AT1729

Preliminary

3-Channel PWM Controller for LCD Bias

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

2

Pin Configuration

Ordering Information

Part number

Package

Marking

AT1729

TSSOP16

-

Pin Description

Symbol

Pin

No.(A/B)

Descript

Symbol

Pin

No.(A/B)

Descript

FB1

1

CH1 error amplifier output

OUT3

9

CH3 output for Pch-

MOSFET

IN1

2

CH1 inverting input to

error amplifier

OUT2

10

CH2 output for Nch-

MOSFET

IN2

3

CH2 inverting input to

error amplifier

VCC

11

Power Supply

GND

4

Control blocks ground

OUT1

12

CH1 output for Nch-

MOSFET

PGND

5

Power blocks ground

REG

13

Regulated voltage output

FB2

6

CH2 error amplifier output

CT

14

Oscillator timing

capacitor

IN3

7

CH3 inverting input to

error amplifier

CS3

15

Sotf-start for CH3

FB3

8

CH3 error amplifier output CS1_2

16

Soft-star for CH1/2