TPS65191

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 × 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. CKV2 to ASG CKVB1 to ASG CKV1 to ASG RCS2 CKVB2 to ASG CKV3 to ASG CKVB3 to ASG STVP to ASG RBCS2 RCS3 RBCS3 1 CKVBCS2 2 CKVB2 3 NC 4 CKV3 5 CKVCS3 6 CKVBCS3 7 CKVB3 8 STVP CKVCS2 32 CKV2 31 NC 30 CKVB1 29 CKVBCS1 28 CKVCS1 27 CKV1 26 GND 25 RBCS1 RCS1 VON 24 NC 23 VOFF 22 NC 21 NC 20 DISH 19 NC 18 DLY 17 VON CVON VOFF CVOFF Vlogic CDISH CDLY ...