THOMSON T24C99H Schematic

LH185／２１６／２３６Ｎ９９W SERVICE MANUAL



I

NDEX:

PART 1：Brief Introduction Of The LH185／２１６／２３６Ｎ９９W

PART 2: Exploded view

PART 3: IC Introduction

PART 4: Detailed Circuit

PART 5: Components List

PART 6: Components

PART 7: Debug Instruction

6. CONFIGURATION

z The PCB board is thick 1.6 mms
z Component the tallest altitude 16.5 mms
z Install diameter inside the bore 3.5 mms

All rights reserve, if the specification has fluctuation and take real object as quasi

10

4. PICTURE

J5:INVE

RTER

J1:IR&KEY

BOARD

J3:PANEL

POWER

J2:LVDS

J6:AUDIO

OUT

J9:

HDMI

NOTE：J11 can be assembled with YPBPR or SCART .

J10:

VGA

J11:

SCART

J12:

S-VIDEO

J13:

AV

J14:PC

AUDIO

J15:EAR

PHONE

U12:

TUNER

All rights reserve, if the specification has fluctuation and take real object as quasi

6

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PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.cn

5

+12V_I

J8

FUSEF1FUSE

DC-JACKJ8DC-JACK

+5V_SW

3

12

C25

C25
100uF/16V

100uF/16V

D D

C C

F1

1

1 2

2

12

C127

C127
100n

100n

+5Vsb_IN +3.3V_stb

CM1084

CM1084

U5

U5

CM1084

CM1084

3

VIN

VOUT

TAB

GND

1

620ma

CM1084

CM1084

U4

U4

CM1084

CM1084

3

2

VIN

VOUT

4

TAB

GND

1

<FUNCTION>

<FUNCTION>

2
4

<FUNCTION>

<FUNCTION>

220u/16v

220u/16v

包括了

C28

C28

220u/16v

220u/16v

C67

C67
100n

100n

20mA

C84

C84

1.26V的350MA

12

<FUNCTION>

<FUNCTION>

+12V_IN

12

C90

C90
470uF/16V

470uF/16V

1 2

TP6

TP6

1

TEST POINT

TEST POINT

12

C73

C73
100n

100n

1 2

+3.3V_SW

+5V_SW

TP4

TP4

1

TEST POINT

TEST POINT

D2 1N4001D2 1N4001

2 1

D1 1N4001D1 1N4001

2 1

4

+12V_IN

R51

R51
100K

100K

1 2

R870RR87

U7

1 2

C32

C32

3.3n

3.3n

R48

R48

2.2K

2.2K

U2

U2

3

VIN

C31

C31
100n

100n

12

12

L4FBL4
FB

1 2

BM1117-ADJ

BM1117-ADJ

BM1117-ADJ

BM1117-ADJ

VOUT

ADJ

1

TAB

8
7
6
5

VDDP_PM+3.3V_stb

AVDD_MPLL

C88

C88
10U/10V

10U/10V

2
4

100uF/16V

100uF/16V

<FUNCTION>

<FUNCTION>

0R

1 2

1

BS

SYNC

2

VIN

EN

3

VSW

COMP

4

12

GND

FB

C43

C43

1 2

100n

100n

12

C34

C34

C71

C71

9

PAD

100n

100n

MP1482U7MP1482

For PM Mode==>
VDDP_PM & AVDD_MPLL must be alive

1.4mA

6.8mA

12

C97

C97

C87

C87

1 2

100n

100n

100pF

100pF

TV 380mA

VCC1.26V

1

12

TP2

TP2
TEST POINT

TEST POINT

1 2

3

TP1

TP1
+5Vsb_IN

+5Vsb_IN

L5

C74

C74
10n

10n

33uH/2.5AL533uH/2.5A

+5Vsb_IN

1

12

12

R53

R53

12

C56

C56

470uF/16V

470uF/16V

12

C86

C86

68K_1%

68K_1%

100n

100n

R52

R52

15K_1%

15K_1%

1 2

WAKEUP

2

Power on =1

PM==> Power down(PM Mode)=0

WAKEUP

R58

R58

4.7k

4.7k

R59

R59

1 2

4.7k

4.7k

1

1 2

1 2

Q9
3904Q93904

2 3

L1 2A/0805/NCL1 2A/0805/NC

1 2

Q11

Q11

12

+12V

AO3401

AO3401

312

C45

C45
1u

1u

+5Vsb_IN

R4
47kR447k

1 2

R3

2.2kR32.2k

1 2

1

Q3
3904Q33904

2 3

5VA_A

L11FBL11
FB

1 2

12

L10 FB/NCL10 FB/NC

1 2

Q2 AO3401Q2 AO3401

C2

C2
1u

1u

+5V_SW

312

+12V_IN

R70

R70
47k

47k

R61

R61
20k

20k

12

1

+3.3V_SW

B B

+3.3V_SW

A A

1 2

5

AVDD_AU

AVDD_VIF

L6FBL6
FB

C81

C81

10u

10u

AVDDA

12

C26

C26
10U/10V

10U/10V

14mA

C76

C76

1 2

100n

100n

142mA

12

12

C95

C95

C80

C80

1 2

100n

100n

100pF

100pF

VDDP

295mA 78mA

C115

C115

C22

C22

C89

C89

C55

C55

1 2

1 2

1 2

1 2

100n

100n

100n

100n

100n

100n

100n

100n

VCC1.26V VDDC

C46

C46

1 2

100n

100n

C35

C35

C109

C109

1 2

1 2

100n

100n

100n

100n

4

A2
AHOLE138A2AHOLE138

380mA

C39

C39

C62

C62

C23

C23

1 2

1 2

1 2

100n

100n

100n

100n

100n

100n

+5Vsb_IN

12

+5Vsb_IN

R33

A4

A1

A3

AHOLE138A4AHOLE138

AHOLE138A1AHOLE138

AHOLE138A3AHOLE138

1

1

1

1

3

5VA_A

<FUNCTION>

<FUNCTION>

NC

NC

6

6

5

5

4

4

3

3

2

2

POWER1_ON/OFF WAKEUP

1

1

J16

J16

TOP TEST POINT

M9

1

TPADM9TPAD

BUTTOM TEST POINT

M13

M13

1

TPAD

TPAD

+5Vsb_IN

1

POWER1_ON/OFF

C118

C118
100n/NC

100n/NC

M8

1

TPADM8TPAD

M12

M12

M6

1

TPAD

TPAD

TPADM6TPAD

2

R33

12

1k/NC

1k/NC

R13

R13

1 2

R32 NC/0RR32 NC/0R

12

Q29

Q29

3904/NC

3904/NC

2 3

M5

1

TPADM5TPAD

10k/NC

10k/NC

1

R56 4.7k/NCR56 4.7k/NC

Q28

Q28

1

3904/NC

3904/NC

12

01_POWER

01_POWER

01_POWER

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

H:ON
L:OFF

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

1

2 3

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

C

C

C

Date: Sheet of

Date: Sheet of

Date: Sheet

0

0

0

28Friday, April 15, 2011

28Friday, April 15, 2011

28Friday, April 15, 2011

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

of

V1.0

V1.0

V1.0

5

4

3

2

1

SDA_HD
SCL_HD

B_TX0+
B_TX0­G_TX1+
G_TX1­R_TX2+
R_TX2­TXCLK+
TXCLK-

HD5V

12

C144

C144
100n

100n

24C02=>EDID code must
be upto 256byte space,
for HDMI interface.

SDA_HD
SCL_HD

B_TX0+
B_TX0­G_TX1+
G_TX1­R_TX2+
R_TX2­TXCLK+
TXCLK-

HDMI

J9

20

GND0

21

GND1

22

D D

C C

B B

GND2
GND3

CEC/DDC GND

DDC SCL

DDC SDA

Dat2 shield
Dat1 shield
Dat0 shield

clk shield

DAT0+

DAT0-

DAT1+

DAT1-

DAT2+

DAT2-

HDMIJ9HDMI

HD5V

RX_0+
RX_0­RX_1+
RX_1­RX_2+
RX_2-

RX_C+
RX_C-

HD5V

DDC_CLK_IN
DDC_DAT_IN

HPD

HD5V

23

18

+5V

17
15
16
13

CEC

19

HPD

2
5
8
11

7
9
4
6
1
3
10

clk+

12

clk-

14

NC1

R161

R161

R160

R160

10K

10K

10K

10K

1 2

1 2

D10

D10

1N4148

1N4148

<FUNCTION>

<FUNCTION>

R140 100RR140 100R

1 2

R141 100RR141 100R

1 2

R165 0RR165 0R

1 2

R164 0RR164 0R

1 2

R167 0RR167 0R

1 2

R166 0RR166 0R

1 2

R169 0RR169 0R

1 2

R168 0RR168 0R

1 2

R163 0RR163 0R

1 2

R162 0RR162 0R

1 2

21

HOTPLUG

R1701KR170
1K

1 2

HPD

R133 4.7KR133 4.7K

1 2

1

3904

3904

2 3

Q24

Q24

R134

R134
10K

10K

1 2

HPLUG

HPLUG

A A

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

02.HDMI Interface

02.HDMI Interface

02.HDMI Interface

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

B

B

B

Date: Sheet of

Date: Sheet of

5

4

3

2

Date: Sheet

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

0

0

0

38Friday, April 15, 2011

38Friday, April 15, 2011

38Friday, April 15, 2011

1

V1.0

V1.0

V1.0

of

VGA

D D

+5Vsb_IN

SCART_AVOUT

+5V_SW

C C

CVBSOut1

YC

J12 SVIDEOJ12 SVIDEO

SCART

B B

J11

J11

SCART

SCART

A A

5

1617

VGA_RX

1

11

6
2

12

7
3

13

8

VGA_TX

4

14

9
5

15

10

J10

J10
VGA

VGA

R187 4.7KR187 4.7K

1 2

R194 4.7KR194 4.7K

1 2

12

C135

C135
100n

100n

U13

U13

1

NC1

VCC

2

NC2

VCLK

3

NC3

SCL

GND4SDA

24C02/NC

24C02/NC

C60

C60

100n

100n

R150

R150

1 2

22k

22k

1 2

C128

C128

1

12

10u/25V

10u/25V

R149

R149
10k

10k

1 2

S_Y

31

1 2

S_C

1 2

42

12

12

12

C139

C139

L8 2.2uHL8 2.2uH

220p

220p

L9 2.2uHL9 2.2uH

765

C137

C137
220p

220p

C141

C141

C138

C138

220p

220p

220p

220p

SHIELD

SHIELD

21

V_IN

V_IN

20

V_OUT

V_OUT

19
18
17
16
15

DATAGND

DATAGND

14
13
12
11
10
9

SWTCH

SWTCH

8
7
6
5
4

A_OUT_L

A_OUT_L

3
2

A_OUT_R

A_OUT_R

1

AV_OUT

BLANKGND

BLANKGND
VGND

VGND
BLANK

BLANK
R

R

SCART_R

RGND

RGND
DATA

DATA
G

G

SCART_G

CLKOUT

CLKOUT
GGND

GGND

AUDIO/RGB/16:9

B

B

SCART_B

A_IN_L

A_IN_L

SCART-L

R158 10kR158 10k

1 2

BGND

BGND
AGND

AGND

SCART_LOUT

SCART_LOUT

A_IN_R

A_IN_R

SCART-R
SCART_ROUT

SCART_ROUT

12

12

C132

C132

C134

C134

22n

22n

22n

22n

12

12

12

R198

R198

R199

R199

R200

R200

75R

75R

75R

75R

75R

75R

R-

G­B-

DDC_SCL

VGA_RX
DDC_SCL

DDC_SDA

VGA_TX
DDC_SDA

8
7
6
5

R152

R152
220R

220R

Q23

Q23

1

1 2

3906

3906

Q22

Q22

3 2

3904

3904

AV_OUT

R155 220RR155 220R

R156 75RR156 75R

12

12

2 3

R172

R172
75R

75R

1 2

R128 33RR128 33R

C116 47nFC116 47nF

1 2

1 2

SV_Y0

R129 33RR129 33R

1 2

1 2

SV_C0

C117 47nFC117 47nF

12

12

12

R17575RR17575R

R17375RR17375R

C120

C120
R131

R131

CVBS0AV2

33R

33R

1 2

12

47nF

47nF

R196

R196
75R

75R

FB

12

SCART_G

R17175RR17175R

SCART_R
SCART_B

AV_MODE

12

R147

R147

2.7k

2.7k

R139

R139

SCART-L

C149

C149
22pF

22pF

SCART-R

C148

C148
22pF

22pF

Close to connector

R127 10R127 10

R

1 2

G

R126 0RR126 0R

1 2

B

R125 10R125 10

1 2

R123 10R123 10

1 2

RXD

R222 NCR222 NC

1 2

RXD

R223 0RR223 0R

1 2

TXD

R234 NCR234 NC

1 2

TXD

R239 0RR239 0R

1 2

R1424.7k R1424.7k

R1454.7k R1454.7k

12

12

+5Vsb_IN

CVBS0

C105 1nC105 1n

R119 0RR119 0R

1 2

1 2

R120 33RR120 33R

C106 47nFC106 47nF

1 2

1 2

C108 47nFC108 47nF

R122 33RR122 33R

1 2

1 2

R118 33RR118 33R

C104 47nFC104 47nF

1 2

1 2

12

12

12

R157

R157

R148

R148

75R

75R

75R

75R

75R

75R

C66

C66
R193

R193

12

1 2

10K

10K

12

R192

R192

12

10K

10K

1u

1u

12

C143

C143

R182

R182

560pF

560pF

12K

12K

1 2

C63

C63

1 2

12

12

R181

R181

1u

1u

C142

C142

12K

12K

560pF

560pF

1 2

Close to MST IC

C113 1nC113 1n
C112

C112

C114 47nFC114 47nF

C110 47nFC110 47nF

SOY

1 2
1 2
1 2
1 2

RIN+

SOG

47nF

47nF

GIN+

BIN+

close to MST IC

R189 100RR189 100R

1 2

R191 100RR191 100R

1 2

12

12

R197

R197

R190

R190

2.2K

2.2K

2.2K

2.2K

J7

J7
AV3-8R4-5

AV3-8R4-5

L

L

6
5

R

R

4
3

V

V

2
1

SOY
Y+
PR+
PB+

AV_AUL2

AV_AUR2

4

3

2

1

PC audio Input

J14

J14

GND

GND

1

AUDIO_R

AUDIO_R

3
5
4
2

AUDIO_L

AUDIO_L

PHONOJACK

PHONOJACK

HS_RGB

V_RGB

AV_AUDIO&VIDEO Input

SCART_R

SCART_B

SCART_G

R180 10KR180 10K

12

12

C147

C147
22pF

22pF

R202 10KR202 10K

12

C151

C151
22pF

22pF

AV_RIN

AV_LIN

CVBS_1

J13

J13
AV3-8R4-5

AV3-8R4-5

L

L

AV_RIN

6
5

R

R

AV_LIN

4
3

V

V

CVBS_1

2
1

V_RGB

FB

1

AUDIO_SEL

C70

C70

PC_R

1 2

10K

10K

R186

R186
10K

10K

R130

R130
33R

33R

1 2

AV_AUR1

1u

1u

C72

C72

PC_L

1 2

AV_AUL1

1u

1u

C77

C77

12

1 2

PC_AUR0

12

R185

R185

C146

C146

1u

1u

12K

12K

560pF

560pF

1 2

C78

C78

1 2

12

PC_AUL0

12

1u

1u
R183

R183

C145

C145

12K

12K

560pF

560pF

1 2

1 2

CVBS1

C119

C119
47nF

47nF

C140 NCC140 NC

1 2

Q25

Q25
3904

3904

23

1

Q26

Q26
3906

3906

32

VS_RGB

1

12

C136

C136

R159

R159

560pF

560pF

12K

12K

1 2

12

12

C150

C150

R201

R201

560pF

560pF

12K

12K

1 2

R184

R184

1 2

R179

R179
75R

75R

R174 NC R174 NC

R195 1k R195 1k

1 2

+12V

R203

R203
10k

10k

R188 100k R188 100k

1 2

1 2

Q27

Q27
3904

3904

2 3

High (1-3V) - RGB / Low (0-0.4V) - Composite

5

4

3

2

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

03.Video&AudioInterface

03.Video&AudioInterface

03.Video&AudioInterface

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

D

D

D

Date: Sheet

Date: Sheet

Date: Sheet

1

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

0

0

0

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

48Friday, April 15, 2011

48Friday, April 15, 2011

48Friday, April 15, 2011

of

of

of

V1.0

V1.0

V1.0

5

D D

7805/500MA

+12V

12

C52

C52

100uF/16V

100uF/16V

C C

12
13
14
15

F21WT-3DAR-E

F21WT-3DAR-E

U12

U12

B B

7805/500MA

U6

U6

+5V_IN_TUNER

LM340

LM340

1

3

VIN

VOUT

C33

C33

GND

TAB

<FUNCTION>

<FUNCTION>

2

4

12

GND1
GND2
GND3
GND4

220uF/16V

220uF/16V

C58

C58
100n

100n

IF_TV

11

IF

10

NC5

9

NC4

8

ADC

7

+5V

6

NC2

5

SDA

4

SCL

3

AS

2

NC1

AGC

1

AGC

12

<FUNCTION>

<FUNCTION>

12

TP5

TP5

1

TEST POINT

TEST POINT

12

C30

C30
100n

100n

R28

R28
NC

NC

+5V_IN_TUNER

1 2

R85 10 R85 10

1 2

R89 10 R89 10

12

12

C64

C64

C75

C75

22pF

22pF

22pF

22pF

R111

R111
100R

100R

4

Layout placement
Close to Tuner

+12V VIF_12V

R37

R37
150R/NC

150R/NC

12

C59

C59

C21

C21

100n

100n

100uF/16V/NC

100uF/16V/NC

IF_TV

C20

C20
10nF

10nF

I2C_SDA
I2C_SCL

D7

1N4148D71N4148

R94

R94
12K

12K

C101

C101

1 2

100n

100n

VIF_12V

12

C14

C14

C12

C12

R31

R31

10nF

10nF

2.2u

2.2u

1 2

1 2

6.8K

6.8K

1 2

R360RR36
0R

C150RC15
0R

R340RR34

12

0R

R271KR27
1K

TAGC

Q6

2SC2717Q62SC2717

TAGC

L2

0.82uHL20.82uH

1

3

P+S R101=NC R134=0R

12

R35

R35
680R

680R

32

R44

R44
22R

22R

12

C100

C100
10nF

10nF

1 2

C103

C103
10nF

10nF

R109

R109

6.8K

6.8K

R107

R107

6.8K

6.8K

+5V_IN_TUNER

R116

R116

6.8K

6.8K

R112

R112

6.8K

6.8K

+5V_IN_TUNER+5V_IN_TUNER

R95

R95

3.3K

3.3K

R990RR99
0R

R115

R115

6.8K

6.8K

R117NCR117
NC

P+N R101=0R R134=NC
NTSC R101=NC R134=NC

layout placement
Close to Mstar IC

use for two standard audio system.
this is for PAL BG/DK/I,SECAM L &
switch L'.

U10

U10
K9352

K9352

1

IN

D8
BAV277D8BAV277

ING2OUT1

Q18

Q18

R100 NCR100 NC

1

3904

3904

2 3

U11

U11
K7262

K7262

1

SAW

SAW

D9
BAV277D9BAV277

ING2OUT1

GND

3

Q19

Q19

R101 10KR101 10K

SIF_CTL

1

3904

3904

2 3

2

SIF

OUT2

SAW

SAW

GND

3

OUT25IN

4

SIFP

5

4

SIF_CTL

SIFP

SIF

SIFM

SIFM

SIF_CTL

VIFM

VIFM

VIF

VIFP

VIFP

1

A A

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

04.IF Interface

04.IF Interface

04.IF Interface

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

C

C

C

Date: Sheet of

Date: Sheet of

5

4

3

2

Date: Sheet

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

1

0

0

0

58Friday, April 15, 2011

58Friday, April 15, 2011

58Friday, April 15, 2011

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

of

V1.0

V1.0

V1.0

5

+3.3V_stb

3

D5

D5
BAV99

BAV99

12

R80

R80

1

2

12

C37

C37
100n

R66 4.7KR66 4.7K

DVI/HDMI

VGA

Y,Pb,Pr

VIDEO

AUDIO

R501KR50

1K

100n

Q15

Q15

1

12

3906

3906

R76

R76

SYS_RST

HWRESET

12

3 2

100R

100R

R73

R73

12

22K

22K

TXCLK­TXCLK+
B_TX0­B_TX0+
G_TX1­G_TX1+
R_TX2-

R_TX2+
SDA_HD
SCL_HD

INPUT

HS_RGB

VS_RGB

BIN+

SOG

INPUT

GIN+

RIN+

PR+

SOY

Y+

PB+

INPUT

CVBS0

SV_C0

SV_Y0

CVBS1
CVBSOUT1

INPUT

PC_AUL0

PC_AUR0

AV_AUL1

AV_AUR1

AV_AUL2

AV_AUR2

AUDIO

INPUT

AUOutL1_amp
AUOutR1_amp

OUTPUT

VIFP

VIFM

SIFP

SIFM

VIF

INPUT

+3.3V_SW

1 2

ADJ_PWM

C441nC44
1n

1 2

TXCLK­TXCLK+
B_TX0­B_TX0+
G_TX1­G_TX1+
R_TX2­R_TX2+
SDA_HD
SCL_HD

HPLUG

HPLUG

HS_RGB
VS_RGB
BIN+
SOG
GIN+
RIN+

PR+
SOY
Y+
PB+

CVBS0

+5V_IN_TUNER

SV_C0
SV_Y0
CVBS1

CVBSOut1

PC_AUL0
PC_AUR0
AV_AUL1
AV_AUR1
COMP_AUL2
COMP_AUR2

AUOutL2

AUOutL2

AUOutR2

AUOutR2

AUOutL1_amp
AUOutR1_amp

VIFP
VIFM
SIFP
SIFM

TAGC

TAGC

AV_MODE

AV_MODE

R571KR57

1K

PWM2

PWM1PWM1

PWM1

SPI_CZ
SPI_DI
SPI_DO1

100K

100K

D D

12

C38

C38
10u

10u

C C

B B

Mode
Selection

+3.3V_SW

1 2

PWM0

FB

1 2

R55 1KR55 1K

1 2

C96

C96

CL=20pf of XTAL

27pF

27pF

1 2

12

12

14.318MHZX114.318MHZ
X1

R1101MR110

3

1M

C98

C98

27pF

27pF

1 2

R121 68RR121 68R

R124 68RR124 68R

R132 68RR132 68R

WARNING !!!
Please close
to chip.

L3FBL3

TAGC

12

12

12

R88

R88

C82

C82

4.7K

4.7K
100n

100n

C48

C48
100n

100n

R82 0RR82 0R

C61

C61

C65

C65

10u

10u

1 2

100n

100n

1 2

+3.3V_SW

12

R6
10KR610K

CZ

SO

C27NCC27
NC

1 2

SCKSPI_CK

78

7531

8642

7531

8642

CZ

RP6

RP6

56

SI

RP22X4

RP22X4

34

SO

12

R103 470RR103 470R

12

SCL_HD

111

DDCDB_CK

SDA_HD

112

DDCDB_DA

TXCLK-

119

RXACKN

TXCLK+

120

RXACKP

B_TX0-

121

RXA0N

B_TX0+

122

RXA0P

G_TX1-

124

RXA1N

G_TX1+

125

RXA1P

HPLUG

126

HPLUGA

R_TX2-

127

RXA2N

R_TX2+

128

RXA2P

PB+

2

BIN1

SOY

3

SOGIN1

Y+

4

GIN1

C107 47nFC107 47nF

12

12

5

GIN1M

PR+

6

RIN1

HS_RGB

8

HSYNC0

BIN+

9

BIN0

C111 47nFC111 47nF

10

12

12

GIN0M

GIN+

11

GIN0

SOG

12

SOGIN0

RIN+

13

RIN0

VS_RGB

14

VSYNC0

SV_C0

16

CVBS3P

SV_Y0

17

CVBS2P

CVBS1

18

CVBS1P

CVBS0

19

CVBS0P

C121 47nFC121 47nF

20

12

12

C85

C85

1 2

C83 100nC83 100n

12

C79

C79
100pF

100pF

12

12

C51

C51
10U/10V

10U/10V

U3

MX25L8005U3MX25L8005

1

CE#

2

SO

3

WP#
VSS4SI

12

C19NCC19
NC

VCOM0

CVBSOut1

21

CVBSOUT

VIFP

30

VIFP

VIFM

31

VIFM

SIFM

32

SIFM

SIFP

10u

10u

33

SIFP

12

35

VR27

37

TAGC

PC_AUL0

39

LINE_IN_2L

PC_AUR0

40

LINE_IN_2R

AV_AUL1

41

LINE_IN_3L

AV_AUR1

42

LINE_IN_3R

AV_AUL2

43

LINE_IN_4L

AV_AUR2

44

LINE_IN_4R

C57 100nC57 100n

12

45

AUCOM

AUVRADN

46

AUVRM

AUVRADP

47

AUVRP

AUVREF

48

AUVREF

AUOutL1_amp

C53

C53

50

DAC_OUT_0L

AUOutR1_amp

51

DAC_OUT_0R

AUOutL2

100n

100n

52

1 2

LINE_OUT_0L

AUOutR2

53

LINE_OUT_0R

+3.3V_SW

12

C11

C11
100n

100n

8

VDD

7

HOLD#

SCK

6

SCK

SI

5

HWRESET

24

113

25

XIN

XOUT

HWRESET

GND01GND922GND7

GPIO Control Pins

ON-PANEL

WAKEUP
LED
AUDIO_SEL
ON-PBACK

AMP-MUTE

4

VDDP_PM

AVDD_MPLL

AVDDA VDDPVDDC

110

23

123

VDDP_2

AVDD_DVI

AVDD_MPLL

TSUMV26KU

TSUMV26KU

GND4

GND6

GND5

GND8

GND358GND11

29

55

34

49

26

L7FBL7

FB

1 2

+5V_SW

12

GPIOD[0]

ALE

3

AVDD_VIF

AVDD_AU

38

90

64

57

102

56

116

7

78

118

54

36

15

VDDC3

AVDD_ADC

AVDD_ADC1

U8

U8

GND263GND1

GND10

79

117

101

R81

R81

4.7K

4.7K

28

VDDP4

VDDP3

VDDP2

VDDP5

VDDP1

VDDP6

VDDC2

VDDC1

AVDD_AU

AVDD_VIF127AVDD_VIF3

AVDD_VIF2

XO0-

100

LVA0P

XO0+

99

LVA0M

XO1-

98

LVA1P

XO1+

97

LVA1M

XO2-

96

LVA2P

XO2+

95

LVA2M

XOC-

94

LVACKP

XOC+

93

LVACKM

XO3-

92

LVA3P

XO3+

91

LVA3M

XE0-

89

LVB0P

XE0+

88

LVB0M

XE1-

87

LVB1P

XE1+

86

LVB1M

XE2-

85

LVB2P

XE2+

84

LVB2M

XEC-

83

LVBCKP

XEC+

82

LVBCKM

XE3-

81

LVB3P

XE3+

80

LVB3M

WAKEUP

115

WAKEUP

114

CEC

109

SAR0

108

SAR1

107

SAR2

R30 100RR30 100R

106

IRIN

105

INT

R144 100RR144 100R

104

DDCA_DA

R143 100RR143 100R

103

DDCA_CK

77

GPIOD[0]

76

GPIOD[1]

SPI_CK

75

SCK

SPI_CZ

74

SCZ

SPI_DI

73

SDI

SPI_DO1

72

SDO

AMP-MUTE

71

AD[0]

SIF-CTL

70

AD[1]

R20 100RR20 100R

69

AD[2]

R1 100RR1 100R

68

AD[3]

ON-PBACK

67

WRZ

ON-PANEL

66

RDZ

AUDIO_SEL

65

ALE

PWM0

62

PWM0

PWM1

61

PWM1

60

PWM2

PWM2

R54 NCR54 NC

59

PWM3

+3.3V_stb+3.3V_SW

12

R96

R96

R40

R40

R39

12

R45

R45
10k

10k

ON_PBACK
SIF_CTLSIF-CTL

R39

R79

R79

R41

R41

10K

10K

10K

10K

1 2

1 2

10K

10K

10K

10K

10K

10K

1 2

1 2

ON_PANEL

WAKEUP

RED/GRN_LED

AUDIO_SEL
ON_PBACK

SIF_CTL

AMP-MUTE

12
12

12

12
12

RP1 RP22X4

RP1 RP22X4

RP2 RP22X4

RP2 RP22X4

RP3 RP22X4

RP3 RP22X4

RP4 RP22X4

RP4 RP22X4

RP5 RP22X4

RP5 RP22X4

SAR0

SAR1
AV_MODE
IR_SYNC

LED
TXD
RXD

I2C_SCL
I2C_SDA

12

RXE0-

78

7531

8642

7531

8642

RXE0+

56

RXE1-

34

RXE1+

12

RXE2-

78

7531

8642

7531

8642

RXE2+

56

RXEC-

34

RXEC+

12

RXE3-

78

7531

8642

7531

8642

RXE3+

56

RXO0-

34

RXO0+

12

RXO1-

78

7531

8642

7531

8642

RXO1+

56

RXO2-

34

RXO2+

12

RXOC-

78

7531

8642

7531

8642

RXOC+

56

RXO3-

34

RXO3+

12

TXD
RXD

do not use GPIO function in PAD_INT
if the system need HDMI_CEC function

I2C_SCL
I2C_SDA

PWM freq :
from 6MHz ~ 12M/2^34(=0.0007)Hz

LVDS CONNECTOR

12

C154

C154

4.7p

4.7p

12

C155

C155

4.7p

4.7p

Key&IR Pad

PH-14AJ1PH-14A

14

14

13

13

12

12

11

11

10

10

9

9

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

J1

U1

1

A0

2

A1

3

A2
GND4SDA

24C32U124C32

RXO3+

30

RXOC+ RXOC-

28
26

RXO2+

24

RXO1+

22

RXO0+

20

RXE3+

18

RXEC+

16
14

RXE2+

12

RXE1+

10

RXE0+ RXE0-

R42 4.7kR42 4.7k

RED/GRN_LED

1 2

C18

C18
NC

NC

+5Vsb_IN

12

12

R15 10kR15 10k

R1722RR1722R

5V_LED
LED_R
LED_G
IR_IN

INPUT

R16 22RR16 22R

MENU
CH+
CH­VOL+
VOL­POWER
Key7

AD1

INPUT
MENU

R8 470RR8 470R

12

CH+

R9 1.2kR9 1.2k

12

CH-

R10 2.4kR10 2.4k

12

+5V_SW

12

C17

C17
100n

100n

8

VCC

7

WP

6

SCL

5

2

J2

292930
272728
252526
232324
212122
191920
171718
151516
131314

111112

8
6
4
2

HEADER15X2-2.0-MaleJ2HEADER15X2-2.0-Male

+5Vsb_IN

1 2

1

12

2 3

C10 10uC10 10u

1 2

C4 100nC4 100n
C5 1nC5 1n
C6 1nC6 1n
C8 22PC8 22P

1 2

AD0

VOL+
VOL­POWER
key7

I2C_SCL
I2C_SDA

9910
778
556
334
112

R291kR29
1k

Q4
3904Q43904

IR_SYNC

C13

C13

NC/22P

NC/22P

R11 1.2KR11 1.2K
R12 470RR12 470R

R14 75RR14 75R

1

RXO3-

12

C152

C152

RXO2­RXO1-

4.7p

4.7p

RXO0­RXE3­RXEC-

12

C153

C153

RXE2­RXE1-

4.7p

4.7p

VCC-Panel

+5Vsb_IN

R191KR19
1K

1 2

LED_G

Q5

R18 10kR18 10k

LED_R

1

1 2

3904Q53904

2 3

+3.3V_stb

12

12

R242kR24

R232k R232k

R26 100RR26 100R

2k

AD1
AD0

0V

12

0.6V

12

1.23V

1.8V

12

+5V_SW

R2

R7

4.7KR24.7K

4.7KR74.7K

1 2

1 2

R25 100RR25 100R

SAR1

12

SAR0

1 2

C9

C7

100nC9100n

100nC7100n

A A

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

05.TSUMV26KU

05.TSUMV26KU

05.TSUMV26KU

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

D

D

D

Date: Sheet

Date: Sheet

5

4

3

2

Date: Sheet

1

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

0

0

0

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

68Friday, April 15, 2011

68Friday, April 15, 2011

68Friday, April 15, 2011

V1.0

V1.0

V1.0

of

of

of

5

AUDIO Pre AMP

D D

R751KR75

R69 1KR69 1K

1K

1 2

C50 1nC50 1n

R77 220KR77 220K

1 2

C47 1nC47 1n

R71 220KR71 220K

Gain=R222/R223+1

AUOutL1_amp

AUOutR1_amp

C C

Near MST.IC

Ground in the middle of the L/R

audio_OUT

R1462KR146
2K

B B

A A

R68 1KR68 1K

AUOutL2

1 2

C41 1nC41 1n

R63 1KR63 1K

AUOutR2

1 2

R64 220KR64 220K R67 220KR67 220K

C36 1nC36 1n

Near MST.IC
Ground in the middle of the L/R

5

Q20

Q20

1

3904

3904

2 3

R135

R135
470R

470R

R1512KR151
2K

Q21

Q21

1

3904

3904

<FUNCTION>

<FUNCTION>

2 3

R137

R137
470R

470R

C68

C68

1 2

1u

1u

Gain=R285/R291+1

C69

C69

1 2

1u

1u

VCC-OP1

Gain=R226/R234

VCC-OP1

Gain=R314/R313

4

R9010R90

AMP_LIN

10

PWD_MT

R92 1KR92 1K

R9110R91

AMP_RIN

10

PWD_MT

R93 1KR93 1K

+12V

R13610R136
10

12

C126

C126
47uF/16V

47uF/16V

C1311uC131
1u

12

C1331uC133
1u

12

4

Q16

Q16

1

3904

3904

<FUNCTION>

<FUNCTION>

2 3

Q17

Q17

1

3904

3904

<FUNCTION>

<FUNCTION>

2 3

SCART_LOUT

SCART_ROUT

AMP_LIN

AMP_RIN

R9710k R9710k

3

TDA1517P

C93 1uC93 1u

12

12

+12V

R74 4.7KR74 4.7K

R83 10KR83 10K

D3

D3
1N4148

1N4148

2 1

MUTE

12

C122

C122
100uF/16V

100uF/16V

2

3906

3906

1

Q13

Q13

PWD_MT

3

D4

D4

2
1

BAV70L

BAV70L

<FUNCTION>

<FUNCTION>

12

12

R9810k R9810k

3

C94 1uC94 1u

0-2V STANDBY

3.3V-6.4V MUTE

1 2

1 2

8.5V-18V POWERON

C91 1nC91 1n

C92 1nC92 1n

AMP-MUTE

U9

1

INV1

9

INV2

8

M/SB

3

SVRR

R84 100K/NCR84 100K/NC

1 2

C42

C42
100uF/16V

100uF/16V

3

2

TPA1517P/ydU9TPA1517P/yd

SGND2HGND110HGND211HGND312HGND413HGND514HGND615HGND716HGND817HGND918PGND

R721KR72
1K

1

2

1

+12V

12VM

D6

D6
0R

0R

2 1

12

5

12VM

2 3

12

C49

C49
100n

100n

7

VCC

4

OUT1

C124 470uF/16V

C124 470uF/16V

6

OUT2

R105

R105

4.7K

4.7K

MUTE

R1080RR108

0R
R1060RR106
0R

12

C102

C102

Q12

Q12

10u/25V

10u/25V

3904

3904

12

12

C99

C99

C125

C125

R104

R104

100n

100n

470uF/16V

470uF/16V

10K

10K

C123

C123

470uF/16V

470uF/16V

1 2
1 2

J15

J15

GND

GND

L

L
R

R

PHONOJACK-PJ339

PHONOJACK-PJ339

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

06.Audio Amp. Interface

06.Audio Amp. Interface

06.Audio Amp. Interface

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

C

C

C

Date: Sheet of

Date: Sheet of

Date: Sheet

7

AUDIO_L

5
6

R154 330R154 330

1
4

R153 330R153 330

3
2

12

12

C13022n C13022n

C12922n C12922n

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

AUDIO_L+
AUDIO_R+

AUDIO_L

AUDIO_R

12
12

1

AUDIO_R

0

0

0

AUDIO_L+

AUDIO_R+

78Friday, April 15, 2011

78Friday, April 15, 2011

78Friday, April 15, 2011

4
3

J6

2

CON4-2.5J6CON4-2.5

1

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

of

V1.0

V1.0

V1.0

5

4

3

2

1

R78

R78

4.7k

4.7k

3904

3904

R62

R62

4.7K

4.7K

考虑到

invert

而且嵌位电压为

1

3904

3904

1

+5V_SW

Q14

Q14

+5V_SW

的控制，

3.3V

+12V_I

R65

R65

4.7k

4.7k

1 2

12

12

C54NCC54

C40

C40
22n

22n

NC

2 3

12

2 3

R60

R60

4.7k

4.7k

Q10

Q10

，所以

12

R49NCR49

NC

ADJ

脚有时候需要

ADJ

处预留分压电阻

INV_ON
INV_ADJ

12

C29

C29
100n

100n

PWM

J5

J5

6

6

5

5

4

4

3

3

2

2

1

1

PH-6A

PH-6A

+12V_I

NC

10

10

9

9

8

8

7

7

INV_ON

6

6

INV_ADJ

5

5

4

4

3

3

2

2

1

1

脉冲

J4NCJ4

D D

Q8
3904Q83904

1 2

ON_PANEL

C C

B B

1

R47

R47

4.7k

4.7k

+3.3V_SW

1 2

2 3

+3.3V_stb

10k

10k
R38

R38

5VA_A

PANEL_POWER_IN

1

+12V_IN

C3

C3

R21 47kR21 47k

NC

NC

1 2

R22 2.2kR22 2.2k

1 2

Q7
3904Q73904

2 3

PANEL_POWER_IN

J3 J3

1
2
3

12

12

C1

C1
1u

1u

4
5
6

12

C24

C24
100u/16v

100u/16v

2

Q1
AO3401Q1AO3401

VCC-Panel

TP3

TP3

1

3

C16

C16
100n

100n

1

TEST POINT

TEST POINT

12

ON_PBACK

ADJ_PWM

1 2

1 2

MANUFACTURE

QC

PCB

PCB

DIP

DIP

LOGO

LOGO

LOGO

LOGO

S3

S3

S2

S2

1

1

A A

5

4

3

QC
PASS

PASS

P/OS1P/O

S1

1

S/NS5S/N

S4

S4

S5

1

1

Cultraview , Inc.

Cultraview , Inc.

Cultraview , Inc.

Title

Title

Title

07.Panel Interface

07.Panel Interface

07.Panel Interface

Size Document Number Rev

Size Document Number Rev

Size Document Number Rev

B

B

B

Date: Sheet of

Date: Sheet of

2

Date: Sheet

CONFIDENTIAL

CONFIDENTIAL

CONFIDENTIAL

CVMV26L-A-4

CVMV26L-A-4

CVMV26L-A-4

3000 LongDong Road

3000 LongDong Road

3000 LongDong Road
Shanghai,China

Shanghai,China

Shanghai,China
(86) 021-68791101

(86) 021-68791101

(86) 021-68791101

0

0

0

88Friday, April 15, 2011

88Friday, April 15, 2011

88Friday, April 15, 2011

1

V1.0

V1.0

V1.0

of

4321

R12

R13

D1

D51

D5

R20

5

12

R55

7

R54

3

C53

EC53

EC55

EC54

R56

+12V

C52

CON2

1
2
3
4
5
6

+12V

U2A

R66

+12V

R61

R59

R62

C2

231

1

CY3

6

T1A

D52

U3

C55

C54

R63

R64

D2

EC10

D3

D4

ZD10

C14

2
1

D10

EC11

D11

3

R7

R8

R22

Q10

R6

C1

薄膜电容

Q1

R17

R15

R16

R5

R19R18

D

C

B

VR1

CX1

R1

R3

NC

R2

R4

LF1

CY1CY2

R9

R10

F1

CON1

L

T3.15AL/250VAC

TR1

N

D

1

2

C

R11

U10

U2B

C11

1

1

2

2
334

R14

6

6

5

5

4

C12

EC12

C13

B

A

1 2 3 4

PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.cn

A

LCD TV IC Series

CULTRAVIEW

9. APPENDIX

Please check the circuit instruction of the remote control board and keyboard for
reference.

Copyright reserved, if any changes, prevail in kind.

13

电子BOM清单

BOM代码 代码 物料名称

5.03.20.08100 5.03.20.08100 CVMV26L-A-40

代码 物料名称 规格型号 单位 数量 工位

3.02.01.01500 插件IC IC DIP YD1517P DIP18 ROHS PCS 1 U9

3.02.02.00800 声表 声表 DIP K9352M30 SAWFB1 ROHS PCS 1 U10

3.02.02.00900 声表 声表 DIP K7262M30 SAWFB1 ROHS PCS 1 U11

3.02.04.00201 晶振 CRYSTAL DIP 14.31818MHZ 20PF +-10PPM HC-49S ROHS PCS 1 X1

3.02.05.05800 电解电容 ECAP DIP 470UF 16V 8*12 105度 "SGF 寿命 3000H” ROHS 剪脚 PCS 5 C86,C90,C123,C124,C125

3.02.05.05900 电解电容 ECAP DIP 10UF 25V 5*11 105度 “SGF 寿命 2000H” ROHS 剪脚 PCS 2 C102,C128

3.02.05.06100 电解电容 ECAP DIP 47UF 16V 5*11 105度 “SGF 寿命 2000H”ROHS 剪脚 PCS 1 C126

3.02.05.06200 电解电容 ECAP DIP 100UF 16V 5*11 105度 “SGF 寿命 2000H” ROHS 剪脚 PCS 6 C25,C24,C34,C42,C52,C122

3.02.05.06300 电解电容 ECAP DIP 220UF 16V 6*11 105度 “SGF 寿命 2000H”ROHS 剪脚 PCS 3 C33,C28,C84

3.02.08.00200 工字电感 工字电感 DIP 8*10 33UH 2.5A 加UL套管 ROHS PCS 1 L5

3.02.15.02700 连接器 CONNECTER DIP 直插 PH-14A ROHS PCS 1 J1

3.02.15.01800 连接器 CONNECTER DIP 直插 PH-6A ROHS PCS 1 J5

3.02.15.03000 连接器 CONNECTER DIP 直插 XH-4A ROHS PCS 1 J6

3.02.16.00600 JACK RCA JACK DIP AV3-8.4-5 间距14MM　黄白红(左至右) ROHS PCS 1 J13

3.02.16.00800 JACK RCA JACK DIP AV3-8.4-5 间距14MM　绿蓝红(左至右) ROHS PCS 1 J7

3.02.16.04400 JACK SVIDEO JACK DIP DS-103 ROHS PCS 1 J12

3.02.16.06900 JACK RGB JACK(VGA) DIP HDR15 蓝色 锡脚2.6MM“LK”ROHS PCS 1 J10

3.02.16.15200 JACK PHONE JACK DIP PJ-325 ROHS PCS 1 J14

3.02.16.15400 JACK DC JACK DIP DC-005H 2.0MM ROHS PCS 1 J8

3.02.17.00100 排针 双排针 DIP 2*15 2mm(30Pin) ROHS PCS 1 J2

3.02.17.00200 排针 双排针 DIP 3*2 2.54mm(6Pin) ROHS PCS 1 J3

3.02.19.00501 FUSE FUSE DIP 玻璃管式快断双帽加UL管 250V 6.3A 3.6*10 ROHS PCS 1 F1

3.02.20.00100 JUMP 2PIN JUMP ROHS PCS 1 跳在J3上

3.02.16.06400 JACK PHONE JACK DIP PJ-339 ROHS PCS 1 J15

3.02.06.11900 高频头 高频头 DIP FS3311D ROHS PCS 1 U12

PCB CVMV26L-A-40-110130b 208mmx65mm FR4 1.6MM OSP H/HOZ

3.01.01.22280 PCB

3.01.02.02400 IC IC SMD BM1117-ADJ SOT-223 ROHS PCS 1 U2

ROHS PCS 1

IC SMD EON25F40-100GCP SOP8 ROHS 丝印F40-100GCP 外包装

3.01.02.03500 IC

EN25F40-100GCP PCS 1 U3

3.01.02.30300 IC IC SMD MP1482 SOP8 ROHS PCS 1 U7

3.01.02.02300 IC IC SMD BM1117-3.3 SOT-223 ROHS PCS 2 U4,U5

3.01.02.25600 IC IC SMD AS7805D-E1 TO-252“BM”ROHS PCS 1 U6

3.01.02.34200 IC IC SMD K24C32 SOP8 ROHS PCS 1 U1

3.01.02.34800 IC IC SMD TSUMV26KE-LF PQFP128 ROHS PCS 1 U8

3.01.03.00300 CAP 0402 CAP SMD 0402 NPO 22pF +-5% 50V ROHS PCS 7 1

3.01.03.00400 CAP 0402 CAP SMD 0402 NPO 27pF +-5% 50V ROHS PCS 2 C96,C98

3.01.03.00500 CAP 0402 CAP SMD 0402 NPO 100pF +-5% 50V ROHS PCS 3 C79,C80,C87

3.01.03.00800 CAP 0402 CAP SMD 0402 X7R 220pF +-10% 50V ROHS PCS 4 C137,C138,C139,C141
C5,C6,C36,C41,C44,C47,C50,C10

3.01.03.01000 CAP 0402 CAP SMD 0402 X7R 1nF +-10% 50V ROHS PCS 11

5,C113,C91,C92

3.01.03.05000 CAP 0402 CAP SMD 0402 X7R 3.3nF +-10% 50V ROHS PCS 1 C32

3.01.03.01500 CAP 0402 CAP SMD 0402 Y5V 22nF -20%～+80% 16V ROHS PCS 5 C40,C129,C130,C132,C134
C104,C106,C107,C108,C110,C111

,C112,C114,C116,C117,C119,C12

3.01.03.01600 CAP 0402 CAP SMD 0402 Y5V 47nF -20%～+80% 16V ROHS PCS 13

0,C121
C4,C7,C9,C11,C17,C22,C23,C30,

C31,C35,C37,C39,C43,C46,C48,C
49,C53,C55,C56,C57,C59,C60,C62
,C65,C67,C71,C73,C76,C82,C83,C
89,C95,C97,C101,C109,C115,C12

3.01.03.01700 CAP 0402 CAP SMD 0402 Y5V 100nF -20%～+80% 16V ROHS PCS 43

7,C135,C144,C16,C29,C58,C99

3.01.03.02300 CAP 0402 CAP SMD 0402 X7R 560pF +-10% 50V ROHS PCS 6 C136,C142,C143,C145,C146,C150

3.01.03.03900 CAP 0402 CAP SMD 0402 X7R 10nF +-10% 50V ROHS PCS 4 C20,C100,C103,C74
C1,C2,C45,C63,C66,C68,C69,C70,

3.01.04.06500 CAP 0603 CAP SMD 0603 Y5V 1uF -20%～+80% 16V ROHS PCS 15

C72,C77,C78,C93,C94,C131,C133

3.01.05.01200 CAP 0805 CAP SMD 0805 Y5V 10uF -20%～+80% 10V ROHS PCS 3 C26,C51,C88

3.01.05.01200 CAP 0805 CAP SMD 0805 Y5V 10uF -20%～+80% 10V ROHS PCS 5 C10,C38,C61,C81,C85

3.01.08.08800 RES 0402 +-1% RES SMD 0402 +-1% 1/16W 15K ROHS PCS 1 R52

3.01.08.06200 RES 0402 +-1% RES SMD 0402 +-1% 1/16W 68K ROHS PCS 1 R53

R82,R87,R99,R119,R126,R223,R2

,,,,,,,

39,R34,R36,C15,R108,R106,R162,
R163,R168,R169,R166,R167,R164

3.01.09.00100 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 0R ROHS PCS 20

,R165
R85,R89,R90,R91,R123,R125,R12

3.01.09.00200 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 10R ROHS PCS 8

7,R136

3.01.09.00400 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 22R ROHS PCS 2 R16,R17
R118,R120,R122,R128,R129,R130

3.01.09.00500 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 33R ROHS PCS 7

,R131

3.01.09.00900 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 68R ROHS PCS 3 R121,R124,R132
R14,R147,R148,R156,R157,R171,

R172,R173,R175,R179,R196,R198

3.01.09.01000 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 75R ROHS PCS 14

,R199,R200
R1,R20,R25,R26,R30,R76,R111,R

3.01.09.01100 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 100R ROHS PCS 13

140,R141,R143,R144,R189,R191

3.01.09.01400 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 220R ROHS PCS 2 R152,R155

3.01.09.01700 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 470R ROHS PCS 5 R8,R12,R103,R135,R137
R19,R50,R55,R57,R63,R68,R69,R

3.01.09.01900 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 1K ROHS PCS 14

75,R92,R93,R170,R195,R29,R72

3.01.09.02000 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 1.2K ROHS PCS 2 R9,R11

3.01.09.02100 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 2.2K ROHS PCS 5 R3,R22,R48,R190,R197

3.01.09.04200 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 2K ROHS PCS 4 R23,R24,R146,R151

3.01.09.02300 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 2.7K ROHS PCS 2 R139,R10

3.01.09.02400 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 3.3K ROHS PCS 1 R95
R2,R7,R58,R59,R62,R66,R81,R88,

R133,R142,R145,R187,R194,R42,

3.01.09.02500 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 4.7K ROHS PCS 20

R47,R60,R65,R74,R78,R105
5,R79,R96,R97,R98,R101,R134,R1

49,R158,R160,R161,R180,R184,R
186,R192,R193,R202,R83,R104,R

3.01.09.02800 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 10K ROHS PCS 27

203

3.01.09.04600 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 20K ROHS PCS 1 R61

3.01.09.03100 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 22K ROHS PCS 2 R73,R150

3.01.09.03400 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 47K ROHS PCS 3 R4,R70,R21

3.01.09.03600 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 100K ROHS PCS 3 R51,R80,R188

3.01.09.03800 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 1M ROHS PCS 1 R110
R94,R159,R181,R182,R183,R185,

3.01.09.05100 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 12K ROHS PCS 7

R201

3.01.09.05300 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 220K ROHS PCS 4 R64,R67,R71,R77

3.01.09.05500 RES 0402 +-5% RES SMD 0402 +-5% 1/16W 6.8K ROHS PCS 5 R107,R109,R112,R115,R116

3.01.11.04000 RES 0603 +-5% RES SMD 0603 +-5% 1/10W 330R ROHS PCS 2 R153,R154

3.01.13.00100 RES 1206 +-5% RES SMD 1206 +-5% 1/4W 0R ROHS PCS 1 D6

3.01.17.00202 BEADS BEADS SMD 10R 500MA 0603 ROHS PCS 4 L3,L4,L6,L7

3.01.18.00402 INDUCTORS INDUCTORS SMD 2.2UH 15mA 0603 ROHS PCS 2 L8,L9

DIODE、

3.01.20.00100

TRANSISTOR DIODE SMD BAV70 SOT-23 ROHS PCS 1 D4
DIODE、

3.01.20.00200

TRANSISTOR DIODE SMD BAV99 SOT-23 ROHS PCS 1 D5
DIODE、

3.01.20.01400

TRANSISTOR DIODE SMD 1N4001(M1) DO-214AC ROHS PCS 2 D1,D2
DIODE、

3.01.20.01500

TRANSISTOR DIODE SMD BA277 SC-79“NXP”ROHS PCS 2 D8,D9

Q3,Q4,Q5,Q7,Q8,Q9,Q10,Q12,Q14
,Q16,Q17,Q18,Q19,Q20,Q21,Q22,
Q24,Q25,Q27

3.01.20.02000

DIODE、
TRANSISTOR TRANSISTOR SMD 3904 SOT-23 ROHS PCS 19

DIODE、

3.01.20.02100

TRANSISTOR TRANSISTOR SMD 3906 SOT-23 ROHS PCS 4 Q13,Q15,Q23,Q26
DIODE、

3.01.20.03700

TRANSISTOR DIODE SMD PML4148L LL-34“NXP”ROHS PCS 3 D3,D7,D10

3.01.21.03000 MOSFET MOSFET SMD GV3401 SOT-23 ROHS PCS 3 Q1,Q2,Q11

3.01.22.01400 HDMI HDMI SMD 19PIN 卧式 无螺孔 “IAF05-19623-SF97R-01” ROHS PCS 1 J9

3.01.35.00100 RESISTOR 0402 RESISTOR SMD 0402*4 8P/4R +-5% 22R 1/16W ROHS PCS 6 RP1,RP2,RP3,RP4,RP5,RP6

3.01.17.00600 BEADS BEADS SMD 31R 3A 1206 ROHS PCS 1 L11

3.01.03.03600 CAP 0402 CAP SMD 0402 NPO 4.7pF +-0.25PF 50V ROHS PCS 4 C152,C153,C154,C155

MP1482

The Future of Analog IC Technology

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

DESCRIPTION

The MP1482 is a monolithic synchronous buck
regulator. The device integrates two 130m
MOSFETs, and provides 2A of continuous load
current over a wide input voltage of 4.75V to
18V. Current mode control provides fast
transient response and cycle-by-cycle current
limit.

An adjustable soft-start prevents inrush current
at turn-on, and in shutdown mode the supply
current drops to 1µA.

This device, available in an 8-pin SOIC
package, provides a very compact solution with
minimal external components.

2A, 18V Synchronous Rectified

Step-Down Converter

FEATURES

• 2A Output Current

• Wide 4.75V to 18V Operating Input Range

• Integrated 130m Power MOSFET Switches

• Output Adjustable from 0.923V to 15V

• Up to 93% Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Fixed 340KHz Frequency

• Cycle-by-Cycle Over Current Protection

• Input Under Voltage Lockout

APPLICATIONS

• Distributed Power Systems

• Networking Systems

• FPGA, DSP, ASIC Power Supplies

• Green Electronics/ Appliances

• Notebook Computers

TYPICAL APPLICATION

INPUT

7

EN

8

MP1482

SS

GND COMP

BSIN

12

SW

FB

64

C3

3.3nF

10nF

3

5

C5

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.

Efficiency vs
Load Current

100

V

OUTPUT

3.3V
2A

EFFICIENCY (%)

95

90

85

80

75

70

65

60

55

50

0 1.0 2.0 2.51.50.5

V

LOAD CURRENT (A)

OUT

= 3.3V

OUT

= 2.5V

MP1482 Rev. 1.0 www.MonolithicPower.com 1

12/13/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.

MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

PACKAGE REFERENCE

ABSOLUTE MAXIMUM RATINGS

Supply Voltage VIN....................... –0.3V to +20V

Switch Node Voltage V
Boost Voltage V

..........VSW – 0.3V to VSW + 6V

BS

............................ 21V

SW

All Other Pins................................. –0.3V to +6V

BS

SW

GND

IN

TOP VIEW

1

2

3

4

SS

8

EN

7

COMP

6

FB

5

Junction Temperature............................... 150°C

Lead Temperature ....................................260°C

Storage Temperature .............–65°C to +150°C

Recommended Operating Conditions

Input Voltage VIN............................ 4.75V to 18V

Output Voltage V

.................... 0.923V to 15V

OUT

Ambient Operating Temperature .... –40°C to +85°C

Thermal Resistance

(3)

θ

JA

θJC

SOIC8..................................... 90 ...... 45... °C/W

Part Number* Package Temperature

MP1482DS SOIC8

For Tape & Reel, add suffix –Z (e.g. MP1482DS–Z)

*

For Lead Free, add suffix –LF (e.g. MP1482DS–LF–Z)

–40° to +85°C

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its
operating conditions.

3) Measured on approximately 1” square of 1 oz copper.

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

Shutdown Supply Current VEN = 0V 1 3.0 µA

Supply Current VEN = 2.0V; VFB = 1.0V 1.3 1.5 mA

Feedback Voltage VFB

4.75V ≤ V

≤ 18V

IN

Feedback Overvoltage Threshold 1.1 V

Error Amplifier Voltage Gain

Error Amplifier Transconductance GEA

High-Side Switch On Resistance

Low-Side Switch On Resistance

(4)

A

(4)

R

(4)

R

400 V/V

EA

DS(ON)1

DS(ON)2

= ±10µA

∆I

C

130 m

130 m

High-Side Switch Leakage Current VEN = 0V, VSW = 0V 10 µA

Upper Switch Current Limit Minimum Duty Cycle 2.4 3.4 A

Lower Switch Current Limit From Drain to Source 1.1 A

COMP to Current Sense
Transconductance

Oscillation Frequency F

Short Circuit Oscillation Frequency F

Maximum Duty Cycle D

Minimum On Time

(4)

220 ns

3.5 A/V

G

CS

340 KHz

osc1

VFB = 0V 100 KHz

osc2

VFB = 1.0V 90 %

MAX

EN Shutdown Threshold Voltage VEN Rising 1.1 1.5 2.0 V

EN Shutdown Threshold Voltage
Hysteresis

210 mV

EN Lockout Threshold Voltage 2.2 2.5 2.7 V

EN Lockout Hysterisis 210 mV

0.900 0.923 0.946 V

800 µA/V

(2)

(1)

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

ELECTRICAL CHARACTERISTICS (continued)

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

Input Under Voltage Lockout
Threshold

Input Under Voltage Lockout
Threshold Hysteresis

V

210 mV

Rising 3.80 4.10 4.40 V

IN

Soft-Start Current VSS = 0V 6 µA
Soft-Start Period CSS = 0.1µF 15 ms
Thermal Shutdown

Note:

4) Guaranteed by design, not tested.

(4)

160 °C

PIN FUNCTIONS

Pin # Name Description

1 BS

2 IN

3 SW

4 GND Ground.

5 FB

6 COMP

7 EN

8 SS

High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 0.01µF or greater capacitor from SW to BS to power the high side switch.

Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
Drive IN with a 4.75V to 18V power source. Bypass IN to GND with a suitably large capacitor

to eliminate noise on the input to the IC. See Input Capacitor.

Power Switching Output. SW is the switching node that supplies power to the output. Connect
the output LC filter from SW to the output load. Note that a capacitor is required from SW to
BS to power the high-side switch.

Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.923V. See

Setting the Output Voltage.

Compensation Node. COMP is used to compensate the regulation control loop. Connect a
series RC network from COMP to GND to compensate the regulation control loop. In some

cases, an additional capacitor from COMP to GND is required. See Compensation
Components.

Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on
the regulator, drive it low to turn it off. Pull up with 100k resistor for automatic startup.

Soft-Start Control Input. SS controls the soft start period. Connect a capacitor from SS to GND
to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 15ms. To disable the

soft-start feature, leave SS unconnected.

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 12V, VO = 3.3V, L = 10µH, C1 = 10µF, C2 = 22µF, TA = +25°C, unless otherwise noted.

V

20mV/div.

V

OUT

20mV/div.

1A/div.

V

SW

10V/div.

V

IN, AC

200mV/div.

V

O, AC

20mV/div.

Steady State Test

V

IN

I

OUT

IN

I

L

= 12V, V

= 0A, IIN= 8.2mA

OUT

= 3.3V

Heavy Load Operation

2A Load

V

5V/div.

V

OUT

2V/div.

1A/div.

V

SW

10V/div.

V

IN, AC

200mV/div.

V

O, AC

20mV/div.

Startup through Enable

V

= 12V, V

IN

I

= 1A (Resistance Load)

OUT

EN

I

L

OUT

= 3.3V

2ms/div.

Medium Load Operation

1A Load

V

EN

5V/div.

V

OUT

2V/div.

1A/div.

V

SW

10V/div.

V

IN, AC

20mV/div.

V

O, AC

20mV/div.

Shutdown through Enable

V

= 12V, V

IN

I

= 1A (Resistance Load)

OUT

I

L

OUT

= 3.3V

2ms/div.

Light Load Operation

No Load

I

L

1A/div.

V

SW

10V/div.

Short Circuit
Protection

V

OUT

2V/div.

I

L

2A/div.

1A/div.

V

SW

10V/div.

V

OUT

2V/div.

2A/div.

I

L

I

L

Short Circuit
Recovery

1A/div.

V

SW

10V/div.

V

OUT

200mV/div.

1A/div.

I

LOAD

1A/div.

I

L

Load Transient

I

L

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

OPERATION

FUNCTIONAL DESCRIPTION

The MP1482 is a synchronous rectified,
current-mode, step-down regulator. It regulates
input voltages from 4.75V to 18V down to an
output voltage as low as 0.923V, and supplies
up to 2A of load current.

The MP1482 uses current-mode control to
regulate the output voltage. The output voltage
is measured at FB through a resistive voltage
divider and amplified through the internal
transconductance error amplifier. The voltage at
the COMP pin is compared to the switch current
measured internally to control the output
voltage.

The converter uses internal N-Channel
MOSFET switches to step-down the input
voltage to the regulated output voltage. Since
the high side MOSFET requires a gate voltage
greater than the input voltage, a boost capacitor
connected between SW and BS is needed to
drive the high side gate. The boost capacitor is
charged from the internal 5V rail when SW is low.

When the MP1482 FB pin exceeds 20% of the
nominal regulation voltage of 0.923V, the over
voltage comparator is tripped and the COMP
pin and the SS pin are discharged to GND,
forcing the high-side switch off.

FB

SS

COMP

EN

+

OVP

1.1V

5

0.3V

8

0.923V

6

2.5V

7

1.5V

--

+

--

--

+

+

+

-­COMPARATOR

+

-­COMPARATOR

OSCILLATOR

100/340KHz

ERROR

AMPLIFIER

EN OK

LOCKOUT

SHUTDOWN

RAMP

CLK

--

+

1.2V

CURRENT

COMPARATOR

CURRENT

SENSE

AMPLIFIER

SRQ

Q

+

--

INTERNAL

REGULATORS

EN

IN

5V

OVP

IN < 4.10V

2

1

3

4

IN

BS

SW

GND

5V

Figure 1—Functional Block Diagram

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

APPLICATIONS INFORMATION

COMPONENT SELECTION

Setting the Output Voltage

The output voltage is set using a resistive
voltage divider from the output voltage to FB pin.
The voltage divider divides the output voltage
down to the feedback voltage by the ratio:

2R

VV

=

OUTFB

Where V

is the feedback voltage and V

FB

the output voltage.

Thus the output voltage is:

923.0V

OUT

×=

R2 can be as high as 100k, but a typical value
is 10k. Using the typical value for R2, R1 is
determined by:

−×= (k)

OUT

2R1R

+

is

OUT

2R1R

+

2R

)923.0V(83.101R

Choose an inductor that will not saturate under
the maximum inductor peak current. The peak
inductor current can be calculated by:

V

OUT

V

⎞
⎟

⎟

IN

⎠

Where I

V

+=

II

LOADLP

is the load current.

LOAD

OUT

S

⎛
⎜

−×

1

⎜

××

Lf2

⎝

The choice of which style inductor to use mainly
depends on the price vs. size requirements and
any EMI requirements.

Optional Schottky Diode

During the transition between high-side switch
and low-side switch, the body diode of the low­side power MOSFET conducts the inductor
current. The forward voltage of this body diode
is high. An optional Schottky diode may be
paralleled between the SW pin and GND pin to
improve overall efficiency. Table 1 lists example
Schottky diodes and their Manufacturers.

For example, for a 3.3V output voltage, R2 is
10k, and R1 is 26.1k.

Inductor

The inductor is required to supply constant
current to the output load while being driven by
the switched input voltage. A larger value
inductor will result in less ripple current that will
result in lower output ripple voltage. However,
the larger value inductor will have a larger
physical size, higher series resistance, and/or
lower saturation current. A good rule for
determining the inductance to use is to allow
the peak-to-peak ripple current in the inductor
to be approximately 30% of the maximum
switch current limit. Also, make sure that the
peak inductor current is below the maximum
switch current limit. The inductance value can
be calculated by:

V

OUT

=

L

Where V
input voltage, f
I

is the peak-to-peak inductor ripple current.

L

is the output voltage, VIN is the

OUT

is the switching frequency, and

S

⎛
⎜

−×

1

⎜

∆×

If

LS

⎝

⎞

V

OUT

⎟
⎟

V

IN

⎠

Table 1—Diode Selection Guide

Voltage/Current

Part Number

Rating

Vendor

B130 30V, 1A Diodes, Inc.

SK13 30V, 1A Diodes, Inc.

MBRS130 30V, 1A International

Rectifier

Input Capacitor

The input current to the step-down converter is
discontinuous, therefore a capacitor is required
to supply the AC current to the step-down
converter while maintaining the DC input
voltage. Use low ESR capacitors for the best
performance. Ceramic capacitors are preferred,
but tantalum or low-ESR electrolytic capacitors
may also suffice.

Choose X5R or X7R

dielectrics when using ceramic capacitors.

Since the input capacitor (C1) absorbs the input
switching current it requires an adequate ripple
current rating. The RMS current in the input
capacitor can be estimated by:

V

OUT

V

⎞
⎟

⎟

IN

⎠

⎛

V

OUT

⎜

×

−×=

II

LOAD1C

1

⎜

V

IN

⎝

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

The worst-case condition occurs at VIN = 2V
where I

C1

= I

/2. For simplification, choose

LOAD

OUT

,

the input capacitor whose RMS current rating
greater than half of the maximum load current.

The input capacitor can be electrolytic, tantalum
or ceramic. When using electrolytic or tantalum
capacitors, a small, high quality ceramic
capacitor, i.e. 0.1µF, should be placed as close
to the IC as possible. When using ceramic
capacitors, make sure that they have enough
capacitance to provide sufficient charge to
prevent excessive voltage ripple at input. The
input voltage ripple for low ESR capacitors can
be estimated by:

OUT

V

⎛
⎜

1

−××

⎜

IN

⎝

I

LOAD

V

=∆

IN

V

f1C

×

S

V

OUT

V

IN

⎞
⎟

⎟
⎠

Where C1 is the input capacitance value.

Output Capacitor

The output capacitor is required to maintain the
DC output voltage. Ceramic, tantalum, or low
ESR electrolytic capacitors are recommended.
Low ESR capacitors are preferred to keep the
output voltage ripple low. The output voltage
ripple can be estimated by:

OUT

×

⎛
⎜

−×

1

⎜

Lf

⎝

OUT

S

V

=∆

V

V

OUT

V

⎞

⎜

⎟
⎟

⎜

IN

⎠

⎝

+×

R

ESR

⎛

⎞

1

⎟
⎟

××

2Cf8

S

⎠

Where C2 is the output capacitance value and

is the equivalent series resistance (ESR)

R

ESR

value of the output capacitor.

In the case of ceramic capacitors, the
impedance at the switching frequency is
dominated by the capacitance. The output
voltage ripple is mainly caused by the
capacitance. For simplification, the output
voltage ripple can be estimated by:

V

OUT

V

=

OUT

2

S

⎛
⎜

−×

1

⎜

×××

2CLf8

⎝

V

OUT

V

⎞
⎟

⎟

IN

⎠

In the case of tantalum or electrolytic capacitors,
the ESR dominates the impedance at the
switching frequency. For simplification, the
output ripple can be approximated to:

V

V ×⎟⎟

OUT

OUT

=

Lf

×

S

V

OUT

V

⎞

IN

⎠

R

ESR

⎛

1

⎜

−×

⎜
⎝

The characteristics of the output capacitor also
affect the stability of the regulation system. The
MP1482 can be optimized for a wide range of
capacitance and ESR values.

Compensation Components

MP1482 employs current mode control for easy
compensation and fast transient response. The
system stability and transient response are
controlled through the COMP pin. COMP pin is
the output of the internal transconductance
error amplifier. A series capacitor-resistor
combination sets a pole-zero combination to
control the characteristics of the control system.

The DC gain of the voltage feedback loop is
given by:

V

AGRA ×××=

EACSLOADVDC

Where A
G

is the current sense transconductance and

CS

R

is the load resistor value.

LOAD

is the error amplifier voltage gain;

VEA

FB

V

OUT

The system has two poles of importance. One
is due to the compensation capacitor (C3) and
the output resistor of the error amplifier, and the
other is due to the output capacitor and the load
resistor. These poles are located at:

G

Where G

f

=

1P

f

=

2P

is the error amplifier transconductance.

EA

EA

××π

1

××π

A3C2

R2C2

VEA

LOAD

The system has one zero of importance, due to the
compensation capacitor (C3) and the compensation
resistor (R3). This zero is located at:

f

=

1Z

1

3R3C2

××π

The system may have another zero of
importance, if the output capacitor has a large
capacitance and/or a high ESR value. The zero,
due to the ESR and capacitance of the output
capacitor, is located at:

f

ESR

=

1

××π

R2C2

ESR

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

In this case (as shown in Figure 2), a third pole
set by the compensation capacitor (C6) and the
compensation resistor (R3) is used to
compensate the effect of the ESR zero on the
loop gain. This pole is located at:

f

=

3P

1

3R6C2

××π

The goal of compensation design is to shape
the converter transfer function to get a desired
loop gain. The system crossover frequency
where the feedback loop has the unity gain is
important. Lower crossover frequencies result
in slower line and load transient responses,
while higher crossover frequencies could cause
system instability. A good rule of thumb is to set
the crossover frequency below one-tenth of the
switching frequency.

To optimize the compensation components, the
following procedure can be used.

1. Choose the compensation resistor (R3) to set
the desired crossover frequency.

Determine the R3 value by the following
equation:

V

V

f2C2

3R ×

=

××π

GG

×

CSEA

OUT

C

<×

V

FB

×

f1.02C2

×××π

GG

CSEA

OUT

S

V

FB

Where fC is the desired crossover frequency
which is typically below one tenth of the
switching frequency.

2. Choose the compensation capacitor (C3) to
achieve the desired phase margin. For
applications with typical inductor values, setting
the compensation zero, f

, below one-forth of

Z1

the crossover frequency provides sufficient
phase margin.

Determine the C3 value by the following equation:

3C

>

4

f3R2

××π

C

3. Determine if the second compensation
capacitor (C6) is required. It is required if the
ESR zero of the output capacitor is located at
less than half of the switching frequency, or the
following relationship is valid:

ESR

f

S

<

2

1

××π

R2C2

If this is the case, then add the second
compensation capacitor (C6) to set the pole f

P3

at the location of the ESR zero. Determine the
C6 value by the equation:

R2C

×

6C

=

ESR

3R

External Bootstrap Diode

An external bootstrap diode may enhance the
efficiency of the regulator, the applicable
conditions of external BST diode are:

z V

z Duty cycle is high: D=

=5V or 3.3V; and

OUT

V

OUT

>65%

V

IN

In these cases, an external BST diode is
recommended from the output of the voltage
regulator to BST pin, as shown in Fig.2

External BST Diode

BST

MP1482

SW

IN4148

C

BST

5V or 3.3V

+

L

C

OUT

Figure 2—Add Optional External Bootstrap

Diode to Enhance Efficiency

The recommended external BST diode is
IN4148, and the BST cap is 0.1~1µF.

Where R3 is the compensation resistor.

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

TYPICAL APPLICATION CIRCUIT

INPUT

7

EN

8

Figure 3—MP1482 with 3.3V Output, 22µF/6.3V Ceramic Output Capacitor

MP1482

SS

GND COMP

C6

(optional)

BSIN

12

SW

FB

64

C3

3.3nF

C5

10nF

3

5

D1
B130

(optional)

OUTPUT

3.3V
2A

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MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION- KONKA USE ONLY

PACKAGE INFORMATION

SOIC8

NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.

Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.

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CVMV26L

CVMV26L

Common Problems Solution

Common Problems Solution

-

A

-

A

-

-

4

4

0

0

—

—

—

—

—

—

—

—

System chart

System chart

Power Unit Problem Solving

Power Unit Problem Solving

Display Unit Problem Solving

Display Unit Problem Solving

Audio Unit Problem Solving

Audio Unit Problem Solving

—

—

Function Unit Problem Solving

Function Unit Problem Solving

In stand-by condition,

Check the pin 1 of J3,

Whether have 12V？

N

N

Y

Main board testing point TP1 got 5V?TP6 got

3.3V?
Y

Check external

power

Check U7 and U5

Normal boot

power network

After power on, check the

pin 8 of U1 got 5V, testing

pin 3 of Q11 got 12V, testing

point TP4 got 3.3V

YN

Picture 1

Picture 1

Powe

Powe

r Unit P

r Unit P

roblem Solvin

roblem Solvin

g

g

(Q2、Q3) is burnt -out

OK

or loading is

shortcircuit, (Q11、

Q9) is burnt -out or

loading is shortcircuit,

power chip LDO(U4)is

running or not?

Picture 2

Display unit(mess)

Mess or black screen

（back light on）

Whether driven board cable

is correct?

connection is Ok?

Y

N

Check whether it is OK

after chaning LCD?

N

Check output network,

Whether J2 driven board

socket part is normal?

Y

Whether the software

matches?

N

Repair this circuit

N

Change LCD

Y

Check whether

U8（TSUMV26）

power supply and

clock circuit chip LVDS

output pin

Upgrade the

matched software again

Check whether

Change

LCDpower VCC-Panel

driven board wire

is correct？J3 selects

correctly?Q14 output

voltage correctly?

is shortcircuit or

open circuit?

Picture three

Display unit(black screen)

Black screen

of main board J5 got 12V?

Y

Whether the output voltage

Whether pin 5,6

N

for pin 4 of J5 is above 3.3V?

NY

Check and repair

power supply

Check and repair

Inverter is broken

power circuit

or connecting line is bad

N

No sound

Picture 4

Whether there is any audio signal input or

Audio unit(no sound)

Whether amplifier power supply is normal?

Y

Whether the volume,

Y

MUTE

setting is normal?

YN

Whether there is

signal

output from J6?

N

Y

Whether there is signal

input in U9（YD1517P）1/9?

N

Check

peripheral

audio

equipment:

amplifier

power

supply

Resetting

Check

external

loudspeaker

Check and repair
amplifier

power supply
circuit ,
if power supply
is normal,

N

Check an d
repair U8

Check whether there is signal

output from U8audio output pin?

Y

Check and repair

network

of the connecting

part between U8
and U9

circuit

then change U9

TV no searching

/no image

Picture 5

N

Check whether external RF

input signalis normal?

Function unit (ATV video broke down)

Y

Check whether

pin 7 of tuner U12 got 5V?

Y

Y

Check pin4,5of tuner U12,

whether there is I

Y

Whether there is intermediate-frequency signal

in pin 11 of U12?

N

2

C data?

N

N

Check whether the direct

connecting network for

U12/U11 is normal?

NY

Whether the

peripheral circuit of U12

is normal?

Y

N

Check whether

Check and

repair

peripheral

RF

equipment

Check video

sound meter U11

circuit and

U8(TSUMV26)

connecting

network

Repair this
connecting

circuit

Change

tuner

Check and

I2C network

Repair

repair power

pull-up voltage

this

supply

is normal?( pin 2

peripheral

network and

of R2 or pin 2 of

circuit

U6 circuit of

R7)

this pin

TV no sound, only picture

Whether there is

sound under PC AV?

Picture 6

Function unit (ATV no sound

N

Y

Check U11 and it circuit

is normal

Y

N

Refer to

“NO SOUND”

repair guide

Change tuner

Repair this

circuit

Under PC

Picture 8

Function unit（PC）

Image not

in the middle

Miss color,

Color

cast

Whether U8（ TSUMV26）

R.G.B input signal is normal?

Whether the contact

of VGA socket is good?

Whether VS,HS signal

Image

No signal

shakes

Whether the

is regular or stable?

contact of

YN

YN

OSD setting

VGA socket

is good?

Carry out

auto-adjust

operation

The system

setting

is incorrect,

reset it

Check VGA

input circuit

doesn’t match,

reset it,

or input mode

doesn’t support

Check VS.HS

circuit

Check VS.HS

circuit

Picture 9

Function unit（SCART,VGA）

RGB、SCART

SCART

miss color,

color cast

Whether U8（ TSUMV26 ）R.G.B

input signal is normal?

All has

no signal

YN

Whether the contact

of SCART socket

is good?

System setting

is incorrect,

reset it

Check SCART R.G.B
input network

Check

U8

（ TSUMV26 ）

power supply

Picture 10

Function unit（HDMI）

Under HDMI

No image

HDMI related

network of U8（

Whether HDMI

There is image

contact is good?

but no sound

Whether there is

Y

TSUMV26 ）

N

Y

sound under PC?

N

Refer to

"power failure"

repair flow

Check
HDMI input
network

Refer to "no

Check HDMI

sound"

input network

repair flow

Picture 12

Function unit（YPBPR

）

YPBPR

YPBPR

miss color

or color cast

No signal

Check perpheral circuit,

Check Y/PB/PR

signal input network

crystal oscillator circui t

of U8

and input network