TPS65166,pdf(Compact LCD Bias

The TPS65166 offers a compact power supply soluTIon to provide all voltages required by a LCD panel for large TV panel applicaTIons running from a 12V supply rail. The device is opTImized to support LCD technology using ASG gate drive circuits.

The device generates all voltage rails for the TFT LCD bias (V_S, V_ONE, V_OFFE, V_SS). In addiTIon to that it includes a step-down converter (V_logic) to provide the logic voltage. By pulling the HVS pin high an implemented high voltage stress test feature programs the boost converter output voltage V_s to higher values. The boost converter operates at a fixed switching frequency of 750kHz. The positive charge pump is running from the boost converter and is regulated by an external transistor.