intersil ISL6722A, ISL6723A DATA SHEET

®

P

ISL6722A, ISL6723A

彈性單端電流模式 PWM 控制器

數据資料

January 2006

主要特點

FN9237.0

ISL6722A 和 ISL6723A 是低功耗, 單端脈沖寬度調制 (PWM)

電流模式控制器适用于的多种 DC/DC 轉換應用, 包括升壓調

節器, 反饋轉換器以及隔离式輸出配置。与 ISL6721 相似并且

引腳兼容, ISL6722A 和 ISL6723A 提供了修改的功能集。

ISL6722A 用能減少待机電流低于 200µA 的低功耗休止功能

來取代原先的外部同步功能。ISL6723A 改變輸入電壓的欠壓

臨界至 13V。另外, 兩個控制器的內部過溫保護也被去除。控

制器的其余的功能沒有改變，并有包括當輸入電流低于

200µA 時過流及過壓故障切斷的一個低功耗模式。內置

300ms 的延遲時鐘能夠避免當故障切斷時控制器快速”打嗝”

的表現。

這個先進的 BiCMOS 設計兼容了低工作電流, 可調振蕩頻率

高達 1MHz, 以及可調軟啟動。

定購資料

零件號碼零件標號溫度范圍

(o C)

ISL6722AABZ (Note)

ISL6723AABZ (Note)

ISL6722AAVZ (Note)

Add -T suffix to part number for tape and reel packaging.

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

6722AAB

Z

6723AAB

Z

6722AAV

Z

-40 to 105

包裝包裝圖號

#

16 Ld SOIC

(Pb-

free) 16LD SOIC

(Pb

free) 16 Ld

TSSOP

(Pb-

free)

M16.15

M16.173

• 1A MOSFET 驅動器

• 100µA 啟動電流

• 快速瞬變反應運用峰值電流控制模式

• 可調振蕩頻率高達 1MHz

• 低功耗的休止模式(ISL6722A)

• 低功耗的切斷模式

• 過壓及過流故障切斷延遲再啟動

• 可調斜率補償

• 可調軟啟動

• 可調過流切斷延遲

• 可調欠壓和過壓指示

• 上升邊緣消隱

• 基准電壓 1%容差

• 不含鉛加退火, 以及 ELV, WEEE (RoHS Compliant)

應用

• 電信和信息電源

• 無線基站電源

• 檔案服務器電源

• 工業動力系統

• 隔离式降壓及反饋轉換器

• 升壓調節器

插腳引線

ISL6722A，ISL6723A (SOIC，TSSOP)

頂視圖

GATE

ISENSE

SYNC/SLEEP

SLOPE

UV

OV

RTCT

1

2

3

4

5

6

7

89ISET FB

VC

16

PG ND

15

VCC

14

VRE F

13

LGND

12

SS

11

COM

10

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774|Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners

內部電路結构 (ISL6722A)

V

LGND

SLEEP

ISET

ISENSE

SLOPE

COMP

VFB

CC

5K

VREF

SS

+

-

2.5V

+

BG

-

0.8

53 µ A

0. 1

SS CLAM P

+

STAR T/STOP

UV C OMPARAT OR

+

-

+

Σ

100 mV

+

ERROR

AMPLIFIE

R

+

-

ISL6722A, ISL6723A

V

REF

5.00 V

ENABLE

SS CH ARGE

VOLTAGE C LAMP

OC

FAULT

OC

OVERCURRENT

SHUTDOWN

DELAY

SS LOW

FAULT LATC H

SRQ

Q

-

+

BG

+

-

+

SS LOW

COM PARATOR

VREF

STAR T

SS CH ARGED

SET DOMINANT

VREF

UV C OMPARAT OR

4. 65V

RESTA RT

DELAY

OC DETECT

-

+

-

+

OVERCURRENT

COM PARATOR

PWM

COM PARATOR

1/3

+

-

100 nS

BLANKIN G

-

+

4. 375 V

SS DCHG

SS CH GSHT DN

270 mV

SOFT START

CHARGE

CURRENT

25 µ A

ON

-

+

70 µ A

ON

VREF

SS

15 µA

RTCT

20K

30K

VREF

3.0 V/

1. 5V

1mA

ON

12K

OSCILLATOR

COM PARATOR

-

+

-

+

-

2.50V

-

+

BLANKIN G

ON

COMPARATOR

SRQ

Q

3.0V

-

+

-

+

1.45V

36K

OV

UV

V

C

GATE

PGND

2

內部電路結构 (ISL6723A)

V

LGND

ISET

ISENSE

SLOPE

COMP

VFB

CC

5K

VREF

SS

+

-

2.5 V

BG

0.8

53 µA

0.1

SS CLAM P

+

START /STOP

UV COMPARATOR

+

-

+

-

Σ

100 mV

+

ERROR

AMPLIFIE

R

+

-

+

ENABLE

RESTAR T

DELAY

-

+

OVERCURRENT

COM PARATO R

V

REF

5. 00 V 1 %

OC DETECT

PWM

COM PARATOR

1/ 3

ISL6722A, ISL6723A

SS CHAR GE

VOLTAGE CLAM P

SS CHARGED

+

-

100 nS

BLANKIN G

START

UV C OMPARAT OR

SET DOMINANT

VREF

4.65V

OC

FAULT

OC

OVERCURRENT

SHUT DOWN

DELAY

SS LOW

FAULT LATC H

SRQ

Q

-

+

BG

+

-

SS DCHG

SS CHGSHTD N

-

+

SS LOW

COMPARATOR

VREF

+

4.375 V

270 mV

25 µA

-

+

SOFT START

CHARGE

CURRENT

ON

VREF

70 µA

ON

SS

15 µA

RTCT

SYNC

+

-

+

36K

-

2.50V

-

+

1.45V

VREF

20 K

3.0V 12 K

1.5V

4. 5K

ON

Bi-Directional

Synchronization

OSC IN

CLK OUT

NO EXT SYNC

EXT SYN C BLANKIN G

SYNC IN SYNC OUT

VREF

SRQ

Q

30 K

OSCILLATOR

COMPARATOR

-

+

VREF

4V

2V

1mA

ON

100

+

-

+

BLANKIN G

COMPARATOR

-

+

3.0 V

-

+

OV

UV

V

C

GAT E

PGND

3

ISL6722A, ISL6723A

典型應用電路– 48V輸入, 兩個輸出反饋轉換 3.3V @ 2.5A, 1.8V

VIN+

P9

TP1

TP3

CR6

C18

Q1

R4

D1

TP5

R3

R23

C4 U4

VIN-

SLEEP

36 -75 V

R24

C2

R1

C1

R2

Q2

R5

R6

Q3

C3

R25

D2

SP1 SP2

CR5

T1

ISOLATION

XFMR

CR2

C5

R22

TP2

V

ISL6722A

PGND

V

VREF

LGND

SS

COMP

VFB

C

CC

GATE

ISENSE

SLEEP

SLOPE

UV

OV

RTCT

ISET

R21

CR4

C17

C6

R26

R27

C21

C19 C22

+

R16

U2

U3

C15 C16

++

+

C20

R17

R19

C14

R15

R18

C13

R20

R14

TP4

C12

+3 .3V

+1.8V

RETURN

VR 1

R8

C7

R7

R9

4

R10

C8

R11

R12

C9

R13

C11

C10

ISL6722A, ISL6723A

REF

熱性能的資料

Thermal Resistance Junction to Ambient (Typical) θJA (oC/W) 16 Lead SOIC (Note 1)-------------------------------------80 16 Lead TSSOP (Note 1)----------------------------------105 Maximum Junction Temperature -------------------55 Maximum Storage Temperature Range-----------65 Maximum Lead Temperature (Soldering 10s)--------------300

o

C to 150oC

o

C to 150oC

o

C

(SOIC, TSSOP – Lead Tips Only)

額定值

Supply Voltage, VCC, VC -----------GND - 0.3V to +20.0V GATE ------------GND-0.3V to Gate Output Limit Voltage PGND to LGND -------------------------------------------+ VREF ---------------------------------------GND – 0.3V to 5.3V Signal Pins --------------------------------GND – 0.3V to V Peak GATE Current ------------------------------------------- 1A ESD Classification

Human Body Model (Per JESD22-A114C.01)--------------------1250V Charged Device Model (Per JESD22-C101-A)-------------------1000V

0.3V

運行條件

Supply Voltage Range (Typical)------------------9V-18VDC Temperature Range ISL6722AAxZ-------------------------------40 ISL6723AAxZ----------------------------- -40

CAUTION: Stress above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied.

Notes:

1) θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for

details.

2) All voltages are with respect to GND.

電气規范

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block Diagram and Typical Application Schematic.

9V < V

o

C to 105oC

o

C to 105oC

Electrical Specifications

= VC < 20V, RT = 11kΩ, CT = 330pF, TA = -40oC to 105oC (Note 3), Typical values are at TA= 25oC (Continued)

CC

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

UNDERVOLTAGE LOCKOUT

START Threshold (ISL6722A) SLEEP = 0V 7.95 8.25 8.55 V

START Threshold (ISL6723A) 12.4 13 13.4 V

STOP Threshold 7.4 7.7 8.2 V

Hysteresis (ISL6722A) 0.50 0.55 1.00 V

Hysteresis (ISL6723A) 4.00 5.00 6.00 V

Start-Up Current, ICC V

OC/OV Fault Operating Current, ICC - 200 300

< START Threshold - 100 175

CC

µA

Operating Current, ICC - 4.5 10.0 mA

Operating Supply Current, IC Includes 1nF GATE loading - 8.0 12.0 mA

REFERENCE VOLTAGE

Overall Accuracy

Line, load, TA = 0 - 105°C 4.95 5.00 5.05 V

Line, load, T

= -40 - 105°C 4.90 5.00 5.05 V

A

Long Term Stability TA = 125°C, 1000 hours (Note 5) - 5.00 - mV

Fault Voltage 4.50 4.65 4.75 V

VREF Good Voltage 4.65 4.8 4.95 V

Hysteresis 75 165 250 mV

Operational Current -10 - - mA

Current Limit -20 - - mA

CURRENT SENSE

Input Impedance

5

- 5 -

kΩ

ISL6722A, ISL6723A

電气規范

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block Diagram and Typical Application Schematic.

9V < V

= VC < 20V, RT = 11kΩ, CT = 330pF, TA = -40oC to 105oC (Note 3), Typical values are at TA= 25oC (Continued)

CC

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

Offset Voltage 0.08 0.10 0.11 V

Input Voltage Range 0 - 1.5 V

Blanking Time (Note 5) 30 60 100 ns

Gain, ACS

V

ISET

= ∆ISET/∆ISENSE

A

CS

0.77 0.79 0.81 V/V

V

= 0V, VFB = 2.3V,

SLOPE

= 0.35V, 1.5V

ERROR AMPLIFIER

Open Loop Voltage Gain (Note 5) 60 90 - dB

Gain-Bandwidth Product (Note 5) - 15 - MHz

Reference Voltage Initial Accuracy VFB = COMP, TA = 25°C (Note 5) 2.465 2.515 2.565 V

Reference Voltage V

= COMP 2.44 2.515 2.590 V

FB

COMP to PWM Gain, ACOMP COMP = 4V, TA = 25°C 0.31 0.33 0.35 V/V

COMP to PWM Offset COMP = 4V 0.51 0.75 0.88 V

FB Input Bias Current V

= 0V -2 0.1 2

FB

COMP Sink Current COMP = 1.5V, VFB = 2.7V 2 6 - mA

COMP Source Current COMP = 1.5V, VFB = 2.3V -0.25 -0.5 - mA

COMP VOH VFB = 2.3V 4.25 4.4 5.0 V

COMP VOL VFB = 2.7V 0.4 0.8 1.2 V

PSRR Frequency = 120Hz (Note 5) 60 80 -

SS Clamp, VCOMP SS = 2.5V, VFB = 0V, I

= 2V 2.4 2.5 2.6 V

SET

Electrical Specifications

µA

dB

OSCILLATOR

Frequency Accuracy 289 318 347 kHz

Frequency Variation with VCC TA = 105°C (F

T

= -40°C (F

A

- F9V)/F9V - 2 3

20V

- F9V)/F9V 2 3

20V

%

Temperature Stability (Note 5) - 8 - %

Maximum Duty Cycle (Note 6) 68 75 81 %

Comparator High Threshold - 3.00 - V

Comparator High Threshold w/Ext. SYNC (ISL6723A)

(Note 5) - 4.00 - V

Comparator Low Threshold - 1.50 - V

Discharge Current

TA = 0 - 105°C 0.75 1 1.2

T

= -40 - 105°C 0.70 1 1.2

A

mA

SOFTSTART

Charging Current SS = 2V -40 -55 -70

µA

Charged Threshold Voltage 4.26 4.5 4.74 V

Initial Overcurrent Discharge Current

Sustained OC Threshold < SS < Charged Threshold

30 40 55

µA

6

電气規范

ISL6722A, ISL6723A

Electrical Specifications

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block Diagram and Typical Application Schematic.

9V < V

= VC < 20V, RT = 11kΩ, CT = 330pF, TA = -40oC to 105oC (Note 3), Typical values are at TA= 25oC (Continued)

CC

Overcurrent Shutdown Threshold Voltage

Charged Threshold minus,

= 25°C

T

A

0.110 0.125 0.140 V

Fault Discharge Current SS = 2V 0.25 1.0 - mA

Reset Threshold Voltage TA = 25°C 0.22 0.27 0.31 V

SLOPE COMPENSATION

Charge Current

Slope Compensation Gain

Discharge Voltage V

SLOPE = 2V, TA= 0 - 105°C -45 -53 -65

T

= -40 - 105°C -41 -53 -65

A

Fraction of slope voltage added to ISENSE, T

RTCT

= 25°C

A

= 4.5V - 0.1 0.2 V

0.1 0.103 0.107 V/V

µA

GATE OUTPUT

Gate Output Limit Voltage

Gate VOH

Gate VOL

Peak Output Current

= 20V, C

V

C

= 0mA

I

OUT

- GATE, VC = 10V,

V

C

= 150mA

I

OUT

GATE - PGND, I

I

= 20V, C

V

C

(Note 5)

= 1nF,

GATE

11.0 13.5 16.0 V

- 1.5 2.2 V

= 150mA 1.2 1.5

OUT

= 10mA 0.6 0.8

OUT

= 1nF

GATE

- 1 - A

V

Output “Faulted” Leakage VC = 20V, UV = 0V, GATE = 2V 1.2 2.6 - mA

Rise Time

Fall Time

Minimum ON time

= 20V, C

V

C

1V < GATE < 9V

= 20V, C

V

C

1V < GATE < 9V

= 0.5V; VFB = 0V; VC = 11V

I

SET

ISENSE to GATE w/10:1 Divider R = 4.75V through 1kΩ

GATE

= 1nF

TCT

- 60 100 ns

- 15 40 ns

- - 110 ns

(Note 5)

OVERCURRENT PROTECTION

Minimum ISET Voltage - - 0.35 V

Maximum ISET Voltage 1.2 - - V

ISET Bias Current V

= 1.00V -1 - 1

ISET

µA

Restart Delay TA = 25°C 150 295 445 ms

OV & UV VOLTAGE MONITOR

Overvoltage Threshold 2.4 2.5 2.6 V

Undervoltage Fault Threshold 1.38 1.45 1.52 V

Undervoltage Clear Threshold 1.41 1.53 1.62 V

Undervoltage Hysteresis Voltage 20 50 100 mV

UV Bias Current VUV = 2.00V -1 - 1

OV Bias Current VOV = 2.00V -1 - 1

µA

7