RT8901

3

DS8901-03 October 2013

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Copyright 2013 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Function Block Diagram

Pin No.

Pin Name

Pin Function

1

VGH

Power Supply Input.

2

VGHM

Switch output directly drives the power supply of Gate Driver IC.

3

RE

Source of the internal high-voltage MOSFET P2 connect to a resistor from this pin

to ground.

4

CD

VGHM Discharging Delay Input. For mode selection and VGHM discharging delay

time setting.

5

VD

VGHM Low-Level Regulation Set-Point Input. The voltage level is 10VD.

6

VDPM

High-Voltage Switch Delay Input. Connect a capacitor from VDPM to GND to set

the delay time. The internal current source is 5μA.

7

GND

Ground.

8

VFLK

Control Signal Input Pin. VFLK is produced from timing controller in LCD module.

Functional Pin Description

Logic

Control

Circuit

Regulator

-

+

9R

R

+

-

+

-

VDD

VDD

50µA

5µA

VGH

VGHM

RE

VD

GND

VFLK

VDPM

CD

VDD

P1

P2

Q3

CDO