TPS65191 Datasheet, PDF (1/27 Pages) Texas Instruments – Triple High-Voltage Scan Driver for TFT-LCD

TPS65191
www.ti.com
SLVS963A – JULY 2009 – REVISED AUGUST 2010
Triple High-Voltage Scan Driver for TFT-LCD
Check for Samples: TPS65191
FEATURES
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• Triple High-Voltage Scan Driver
• Scan Driver Output Charge Share
• High Output-Voltage Level: Up to 35 V
• Low Output-Voltage Level: Down to –28 V
• Logic-Level Inputs
• 32-pin 5-mm × 5-mm QFN Package
APPLICATIONS
• TFT LCD Using ASG (Amorphous Silicon Gate)
Technology
DESCRIPTION
The TPS65191 is a triple high-voltage scan driver to drive an ASG (amorphous silicon gate) circuit on TFT glass.
Each single high-voltage scan driver receives logic-level inputs of CPVx and generates two high-voltage outputs
of CKVx, CKVBx. The device receives a logic-level input of STV and generates a high-voltage output of STVP.
These outputs are swings from Voff (–28 V) to Von (35 V) and are used to drive the ASG circuit and
charge/discharge the capacitive loads of the TFT LCD. In order to reduce the power dissipation of device, a
charge-share function is implemented. The device features discharge function, which shorts Voff to GND in order
to shut down the panel faster when the LCD is turned off.
R_CS2
CKVB2 to ASG
CKV3 to ASG
CKVB3 to ASG
STVP to ASG
R_BCS2
R_CS3
R_BCS3
1 _CKVBCS2
2 _CKVB2
3 _NC
4 _CKV3
5 _CKVCS3
6 _CKVBCS3
7 _CKVB3
8 _STVP
R_BCS1 R_CS1
VON ²⁴
NC ²³
VOFF ²²
NC ²¹
NC ²⁰
DISH ¹⁹
NC ¹⁸
DLY ¹⁷
VON
C_VON
VOFF
C_VOFF
Vlogic
C_DISH
C_DLY
S0418-02
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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