RT8901

®

DS8901-03 October 2013

www.richtek.com

1

©

Copyright 2013 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Ordering Information

35V Gate Pulse Modulator for LCD Panels

General Description

The Gate Pulse Modulator (GPM) is specially designed

for the application of gate driver in TFT LCD panels. The

GPM is controlled by frame signals from timing controller

to modulate the Gate-On voltage that acts a flicker

compensation circuit to reduce the coupling effect between

gate lines and pixels. It also can delay the Gate-On voltage

while power-on for achieving a correct power-on-sequence

for gate driver ICs. Both of the delay time for flicker

compensation and power-on-sequence are programmable

by external resistors and capacitors.

Features

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Flicker Compensation Circuit

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Reduction of Coupling Effect Between Gate Line

and Pixel

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Programmable Power Sequence for Gate Driver IC

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Operation from 20V to 35V Positive Supply Input

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Adjustable Output Delay Time

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RoHS Compliant and 100% Lead (Pb)-Free

Applications



TFT-LCDPanels

Typical Application Circuit

Figure 1. Typical Application Circuit for Mode A and

Mode C

Figure 2. Typical Application Circuit for Mode B

Note :

Richtek products are :



RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.



Suitable for use in SnPb or Pb-free soldering processes.

Marking Information

Pin Configurations

(TOP VIEW)

SOP-8

VGH

2

3

4

5

8

7

6

VGHM

RE

CD

VFLK

GND

VDPM

VD

2

6

8

RT8901

4

1

CD

VFLK

VDPM

VGH

VGHM

RE

1µF

C1

1.5nF

C2

3

R1

1.2k

100pF

C3

5

VD

R5A 200k

R5B

20k

7

GND

R2

33k

2

5

6

8

RT8901

7

4

1

GND

CD

VFLK

VDPM

VGH

VGHM

RE

VD

1µF

C1

1.5nF

C2

3

R1

1.2k

R5A 200k

R5B

20k

100pF

C4

100pF

C3

R2

33k

Package Type

S : SOP-8

Lead Plating System

P : Pb Free

G : Green (Halogen Free and Pb Free)

RT8901

RT8901

GSYMDNN

RT8901GS : Product Number

YMDNN : Date Code

RT8901GS