Datasheet Texas Instruments TPS65191RHBR

TPS65191
www.ti.com SLVS963A – JULY 2009 – REVISED AUGUST 2010 Triple High-Voltage Scan Driver for TFT-LCD
Check for Samples: TPS65191 FEATURES 1 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 Г— 5-mm QFN Package APPLICATIONS TFT LCD Using ASG (Amorphous Silicon Gate)
Technology DESCRIPTION CKV1 to ASG CKV2 to ASG CKVB1 to ASG 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. RBCS1 RCS1 CKVB2 to ASG 1
2
3 CKV3 to ASG 4 RCS3 5
6 CKVB3 to ASG
STVP to ASG RBCS3 7
8 25 GND 26 CKV1 27 CKVCS1 28 29 CKVB1 30 NC 31 CKV2 CKVBCS1 RBCS2 CKVCS2 32 RCS2 VON CKVBCS2 VON CKVB2 NC NC VOFF CKV3 NC CKVCS3 NC CKVBCS3 DISH
NC CKVB3
STVP DLY 24
23 VOFF 22
21 CVON CVOFF Vlogic 20 …