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PDF RT8901 Data sheet ( Hoja de datos )
| Número de pieza | RT8901 | |
| Descripción | 35V Gate Pulse Modulator | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
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.
VCD
VFLK
VDPM
4 CD
VGH 1
RT8901
8 VFLK
VGH
C1
1µF
R2
33k
6 VDPM
VGHM 2
R1
C3
100pF
RE 3 1.2k
VGHM
C2
1.5nF
7 GND
VD 5
R5A 200k
VAVDD
R5B
20k
Marking Information
RT8901GS
RT8901GS : Product Number
RT8901
GSYMDNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
VGH
VGHM
RE
CD
2
3
4
8 VFLK
7 GND
6 VDPM
5 VD
Figure 1. Typical Application Circuit for Mode A and
Mode C
VFLK
VDPM
C4
100pF 4 CD
VGH 1
8
RT8901
VFLK
R2
33k
6 VDPM
VGHM 2
R1
C3
100pF
RE 3 1.2k
VGH
C1
1µF
VGHM
C2
1.5nF
7 GND
VD 5
R5A 200k
VAVDD
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
1
1 page  
RT8901
Parameter
Symbol
Test Conditions
Min Typ Max Unit
CD Mode B Voltage Threshold VCD_THB
2.4 2.5 2.6
V
CD Mode C Operation Range VCD_C
3 -- 3.6 V
VDPM Charge Current
CD Charge Current
IVDPM
ICD
Connect VDPM to GND,
VVGH = 30V, VVFLK = 5V
Connect CD to GND,
VVGH = 30V, VVFLK = 0V
4 5 6 μA
40 50 60 μA
VGH Switch On Resistance
RP1
VVGH = 30V/-20mA at VVFLK = 5V -- 15 30
RE Switch On Resistance
RP2
VVGH = 30V/+20mA at VVFLK = 0V
--
15 30
CD Switch On Resistance RQ3 ICD = +1mA at VVFLK = 5V
-- 1 -- k
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect
device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8901-03 October 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RT8901.PDF ] | |
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