ADD5203ACPZ-RL 查看數據表（PDF） - Analog Devices

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ADD5203ACPZ-RL

8-String, White LED Driver with SMBus and PWM Input for LCD Backlight Applications

Analog Devices 

ADD5203

CIRCUIT DIAGRAM

VIN

VDDIO

26

4

SHDN

25

NC

OVP

16

22

LINEAR

REGULATOR

VOLTAGE

REFERENCE

UVP

COMP

TSD FAULT

SHUTDOWN

ADD5203

THERMAL

SHUTDOWN

OCP FAULT

UVP

REF

REF

ERROR

AMP

GM

LIGHT LOAD

LL

REF

PWM

COMP

R

Q

S

OCP

REF

OVP

REF

COMP 28

DCOMP

DREF

OSC

+

∑

+

CURRENT SENSE

23 SW

24 SW

27 FSLCT

ISET 17

CURRENT

REFERENCE

HEADROOM CONTROL

FB1 7

CURRENT SOURCE 1

LED OPEN/SHORT

FAULT DETECTOR

SOFT START

RSENSE

TSD FAULT

OCP FAULT

20 PGND

21 PGND

FB2 8

FB3 9

CURRENT SOURCE 2

CURRENT SOURCE 3

SMBus INTERFACE

DUTY GENERATOR

5 SDA

6 SCL

FB4 10

CURRENT SOURCE 4

FB5 12

FB6 13

FB7 14

FB8 15

CURRENT SOURCE 5

CURRENT SOURCE 6

CURRENT SOURCE 7

CURRENT SOURCE 8

CURRENT SOURCE CONTROLLER

11

AGND

Figure 2. Circuit Diagram

PWMI DUTY

EXTRACTOR

OPERATION

MODE

SELECTION

PWM

OSCILLATOR

1 PWMI

2 SEL1

3 SEL2

19 C_FPWM

18 R_FPWM

Rev. 0 | Page 3 of 24

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