RT8901 Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – 35V Gate Pulse Modulator for LCD Panels

®
RT8901
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
 Flicker Compensation Circuit
 Reduction of Coupling Effect Between Gate Line
and Pixel
 Programmable Power Sequence for Gate Driver IC
 Operation from 20V to 35V Positive Supply Input
 Adjustable Output Delay Time
 RoHS Compliant and 100% Lead (Pb)-Free
Applications
 TFT-LCDPanels
Ordering Information
RT8901
Typical Application Circuit
Package Type
S : SOP-8
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
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.
V_CD
V_FLK
V_DPM
4 _CD
VGH ¹
RT8901
8 _VFLK
V_GH
C1
1µF
R2
33k
6 _VDPM
VGHM ²
R1
C3
100pF
RE ^{3 1.2k}
V_GHM
C2
1.5nF
7 _GND
VD ⁵
R5A 200k
V_AVDD
R5B
20k
Marking Information
RT8901GS
RT8901GS : Product Number
RT8901
GSYMDNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
VGH
VGHM
2
RE
3
CD
4
8
VFLK
7
GND
6
VDPM
5
VD
Figure 1. Typical Application Circuit for Mode A and
Mode C
V_FLK
V_DPM
C4
100pF _{4 CD}
VGH ¹
8
RT8901
VFLK
R2
33k
6 _VDPM
VGHM ²
R1
C3
100pF
RE ^{3 1.2k}
V_GH
C1
1µF
V_GHM
C2
1.5nF
7 _GND
VD ⁵
R5A 200k
V_AVDD
R5B
20k
SOP-8
Figure 2. Typical Application Circuit for Mode B
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8901-03 October 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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