Skyworth H-LED29V17 Schematic

Description:

MODEL.

Brand Name:

JOB NO.

Engineering Dept:

Artwork By: Date:

Checked By: Date:

Approved By: Date:

SERVICE MANUAL

8M28A CHASSIS

Design and specifications are subject to change without prior notice. (Only Referrence)

SIZE:A5

SERVICE MANUAL 8M28A

SKYWORTH

2012-4-28

Content--------------------------------------------------------------2

11-17

18

19-20

21-29

30-47

48-51

52-59

LED 8M26A

TOSHIBA CODE

Component

PAL SECAM / BG DK PAL / I
NTSC / M

VHF LOW K1~S6
VHF HIGH S7~S36
VHF S37~DS57

44.25MHz ~ 140.25MHz

147.25MHz ~ 423.25MHz

431.25MHz ~ 863.25MHz

Asia\Europe

40

55

80

For 22” LED

For 24” LED

For 32” LED

(24 inches is 4 ohm)

(24 inches is 3W)

80

(26inches is 8 ohm)

40

40

3

2

1

4.2
50

0.5
12000

40

3

Standard

Standard

20

40

NO

YES

8
6

46

46

NO

Spanish

4
2

4

0 40 7 0

0 40 7 0

0 40

40 85

-Y 0 5 0

30000

ʳ

Typical Application Circuit ʳ

AP1117

1A LOW DROPOUT POSITIVE ADJUSTABLE OR

FIXED-MODE REGULATOR

5V

C1
10uF

V

in

V

out

GND

Tab is V

out

( 5V/3.3V fixed output ) ʳ

ʳ

Connection Diagramʳ

ʳ
ʳ

3 PIN SOT223 3 PIN TO252 / TO263

C2

22uF

3.3V/1A

5V

Tab is V

V

out

V

out

Adj

C1
10uF

in

( 5V/2.5V ADJ output ) ʳ

Note:

(1VV 

REFo

R1

121

R2

121

R

R

V

o

2.5V/1A

C2

ȍ

22uF

ȍ

2

)

1

(

Top View )

3

2

1

Tab is V

out

3 PIN SOT89

3

2

1

Tab is V

out

V

in

V

out

Adj ( GND)

V

in

V

out

Adj ( GND)

(

Top View )

3

2

1

Tab is V

out

3 PIN TO220

3

2

1

Tab is V

out

V

V

out

Adj ( GND)

in

V

in

V

out

Adj ( GND)

ʳ

ʳ

AP1117 Rev. 3 2 of 11 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

ʳ

Block Diagramʳ

AP1117

1A LOW DROPOUT POSITIVE ADJUSTABLE OR

FIXED-MODE REGULATOR

3

V

in

Thermal

Shutdown

Pin Descriptionsʳ

2

V

out

+

+

-

1.25V

CURRENT

LIMIT

+

-

+

1

GND

(FIXED)

1

Adj

NAME I/O PIN # FUNCTION

Adj (GND) I 1

V

out

V

in

O 2

I 3

A resistor divider from this pin to the V

(Ground only for Fixed-Mode).

The output of the regulator. A minimum of 10uF capacitor (0.15ȍ ESR  20ȍ)

must be connected from this pin to ground to insure stability.

The input pin of regulator. Typically a large storage capacitor (0.15ȍ ESR  20ȍ)

is connected from this pin to ground to insure that the input voltage does not sag
below the minimum dropout voltage during the load transient response. This pin

must always be 1.3V higher than V

pin and ground sets the output voltage

out

in order for the device to regulate properly.

out

ʳ

AP1117 Rev. 3 3 of 11 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

A1semi 1A Fixed and Adjustable Low

A1

A1

A1

Electronics Ltd Dropout Linear Regulator(LDO)

Pin Configurations

L Package

(SOT-223)

V

OUT

T Package

(TO-220) (TO-252)

AS1117

U Package

(SOT-89)

3

INPUT

2

OUTPUT

1

ADJ/GND

V

OUT

3

2

1

R Package

INPUT

OUTPUT

ADJ/GND

3

INPUT

V

OUT

S Package

(TO-263)

V

OUT

3

2

1

3

2

1

INPUT

OUTPUT

ADJ/GND

INPUT

OUTPUT

ADJ/GND

Figure 2. Pin Configurations of AS1117

V

OUT

2

1

OUTPUT

ADJ/GND

AI SEMI ELECTRONICS LTD. 2

http://www.a1semi.com

A1semi 1A Fixed and Adjustable Low

A1

A1

A1

Functional Block Diagram

Electronics Ltd Dropout Linear Regulator(LDO)

Thermal

Shutdown

AS1117

INPUT

Out

+

-

OUTPUT

GND (Fixed Output)

Figure 3. Functional Block Diagram of AS111 7

ADJ (Adjustable Output)

A1 SEMI ELECTRONICS LTD. 3

http://www.a1semi.com

AOZ1051PI

EZBuck™ 3 A Synchronous Buck Regulator

General Description

The AOZ1051PI is a high efficiency, easy to use, 3 A
synchronous buck regulator. The AOZ1051PI works from

4.5 V to 18 V input voltage range, and provides up to 3 A
of continuous output current with an output voltage
adjustable down to 0.8 V.

The AOZ1051PI comes in an exposed pad SO-8
package and is rated over a -40 °C to +85 °C operating
ambient temperature range.

Features

z 4.5 V to 18 V operating input voltage range

z Synchronous Buck: 70 m internal high-side switch

and 40 m internal low-side switch (at 12 V)

z Up to 95 % efficiency

z External soft start

z Output voltage adjustable to 0.8 V

z 3 A continuous output current

z 500 kHz PWM operation

z Cycle-by-cycle current limit

z Pre-bias start-up

z Short-circuit protection

z Thermal shutdown

z Exposed pad SO-8 package

Applications

z Point of load DC/DC converters

z LCD TV

z Set top boxes

z DVD and Blu-ray players/recorders

z Cable modems

Typical Application

VIN

C1
10μF

VIN

EN

AOZ1051PI

COMP

R

C

C

C

Figure 1. 3.3 V 3 A Synchronous Buck Regulator, Fs = 500 kHz

Rev. 1.0 June 2011 www.aosmd.com Page 1 of 14

AGND

SS

PGND

C

SS

L1 4.7μH

LX

R1

FB

R2

VOUT

C2, C3
22μF

AOZ1051PI

A

Ordering Information

Part Number Ambient Temperature Range Package Environmental

AOZ1051PI -40 °C to +85 °C EPAD SO-8 Green Product

AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.

Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.

Pin Configuration

PGND

VIN

GND

FB

1

2

3

4

PAD
(LX)

8

NC

7

SS

6

EN

5

COMP

Exposed Pad SO-8

(Top View)

Pin Description

Pin Number Pin Name Pin Function

1 PGND Power ground. PGND needs to be electrically connected to AGND.

2 VIN Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high,

the device starts up.

3 AGND Analog ground. AGND is the reference point for controller section. AGND needs to be

electrically connected to PGND.

4 FB Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider

between the output and AGND.

5 COMP External loop compensation pin. Connect a RC network between COMP and AGND to

compensate the control loop.

6 EN Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the

device. If on/off control in not needed, connect EN to VIN and do not leave it open.

7 SS Soft-start pin. 5 μA current charging current.

8 NC No Connect Pin. Pin 8 is not internally connected. Connect this pin externally to LX and

use it for better thermal performance.

Exposed pad LX Switching node. LX is the drain of the internal PFET. LX is used as the thermal pad of the

power stage.

Rev. 1.0 June 2011 www.aosmd.com Page 2 of 14

Block Diagram

AOZ1051PI

VIN

EN

SS

FB

COMP

Reference

& Bias

0.8V

UVLO

& POR

+

EAmp

–

Softstart

5μA

SS

5V LDO

Regulator

Internal

+5V

+

PWM

–

Comp

+

500kHz

Oscillator

OTP

ILimit

PWM

Control

Logic

Level

Shifter

FET

Driver

AGND

+

ISen

–

Q1

+

LX

Q2

PGND

Absolute Maximum Ratings

Exceeding the Absolute Maximum Ratings may damage the
device.

Parameter Rating

Supply Voltage (VIN) 20 V

LX to AGND -0.7 V to V

LX to AGND (20 ns) -5 V to 22 V

EN to AGND -0.3 V to V

FB, SS, COMP to AGND -0.3 V to 6.0 V

PGND to AGND -0.3 V to +0.3 V

Junction Temperature (T

Storage Temperature (T

ESD Rating

Note:

1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5 k

Rev. 1.0 June 2011 www.aosmd.com Page 3 of 14

(1)

) +150 °C

J

) -65 °C to +150 °C

S

 in series with 100 pF.

+0.3 V

IN

+0.3 V

IN

2.0 kV

Recommended Operating Conditions

The device is not guaranteed to operate beyond the Maximum
Recommended Operating Conditions.

Parameter Rating

Supply Voltage (VIN) 4.5 V to 18 V

Output Voltage Range 0.8 V to 0.85 • V

Ambient Temperature (TA) -40 °C to +85 °C

Package Thermal Resistance
Exposed Pad SO-8 (4

Note:

2. The value of
FR-4 board with 2 oz. Copper, in a still air environment with
T

= 25 °C. The value in any given application depends on the

A

user’s specific board design.

4

is measured with the device mounted on a 1-in

JA

JA

(2)

)

50 °C/W

IN

2

SY8086

Package Code

Package Code

High Efficiency 1.4MHz, 1A

Synchronous Step Down Regulator

Preliminary Specification

General Description

The SY8086 is a high-efficiency 1.4MHz synchronous
step-down DC-DC regulator ICs capable of delivering
up to 1A output current. The SY8086 operates over a
wide input voltage range from 2.5V to 5.5V and
integrate main switch and synchronous switch with
very low R

Low output voltage ripple and s mall external indu ctor
and capacitor sizes are achieved with 1.4MHz
switching frequency. This along with small SOT-23
footprint prov ides small PCB area application.

to minimize the conduction loss.

DS(ON)

Ordering Information

SY8086

SY8086

Temperature Range: -40

ƶƶƶƶ(ƶƶ

ƶƶ)ƶƶƶƶ

ƶƶƶƶ(ƶƶ

ƶƶ)ƶƶƶƶ

ƶƶƶƶ

ƶƶƶƶ

Temperature Code

Temperature Code

Optional Spec Code

Optional Spec Code

e

C to 85eC

Ordering Number Package type Note

SY8086AAC SOT23-5 1A

Featur es

•

Low R
250m

2.5-5.5V input voltage range

•

•

1.4MHz switching frequency minimizes the
external components

•

Internal softstart limits the inrush current

•

RoHS Compliant and Halogen Free

•

Compact package: SOT23 5 pin

for inter n al switche s (t op/ b ottom):

DS(ON)

Ω

/200m

Ω

Applications

•

Portable Navigation Device

•

Smart phone

•

USB Dongle

•

Set Top Box

•

Media Player

Typical Applications

V

IN

C

IN

EN

IN

LX

FB

GND

Figure 1. Schematic Diagram Figure2 Efficiency vs Load Current

SY8086 Rev. 0.11 Silergy Corp. Confidential- Prepared for Customer Use Only 1

L

R

R

C1(opt.)

1

2

V

OUT

C

OUT