TPS61187RTJT datasheet(9/25 Pages) TI1

Part #	TPS61187RTJT

Description	WLED Driver for Notebooks with PWM Interface and Auto Phase Shift

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Manufacturer	TI1 [Texas Instruments]

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9 / 25 page

L

Diode

VIN

Slope

Compensation

S

R

Q

Oscillator

Vref

IFB1

PWM

Error

Amp

Comp

SW

IFB2

IFB3

IFB4

IFB5

IFB6

M

U

X

EA

R3

FSLCT

A

D

PWMSignal

Generator

CurrentMirror

R1

RISETH

R2

RFPWM

/ MODE

Maximum

LEDcurrent

EN

VIN

Linear

Regulator

VDDIO

C2

0.1uF

CurrentSink

Phase

Shift

PWM

/

Direct

PWM

Dimming

Control

C3

4.7uF

R4

R5

OVP

Protection

PGND

IFB1

IFB2

IFB3

IFB4

IFB5

IFB6

AGND

EN

Shutdown

C1

2.2uF

OUTPUT

OVC

19

1

14

15

3

4

13

20

2

12

9

11

10

8

7

6

Duty

control

Signal

OCP

Protection

TSD

Protection

Open / Short

LED

IFBnouse

oscillator

Frequency /

dutydecoding

circuit

16

NC

17

Optional

R6

FAULT

Fault

Protection

Fault

Condition

5

R7

RFPO

VDD_GPIO

18

C4

OVC

Vref

PWMSignal

Generator

/

MODE

selection

DirectPWM

Optional

Selection

Logic

TPS61187

www.ti.com

SLVSA85D – JUNE 2010 – REVISED FEBRUARY 2012

FUNCTIONAL BLOCK DIAGRAM

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TPS61187RTJT Datasheet(PDF) 9 Page - Texas Instruments

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