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 outputsof 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 andcharge/discharge the capacitive loads of the TFT LCD. In order to reduce the power dissipation of device, acharge-share function is implemented. The device features discharge function, which shorts Voff to GND in orderto shut down the panel faster when the LCD is turned off.
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