ANX6862

     The ANX6862 is an fully I2C programmable integrated power supply solution optimized for large thin-film transistor (TFT) liquid crystal display (LCD) TV panels which  generates all voltage rails for the TFT LCD bias (AVDD, VGH, VGL) and also 3 buck regulators for VIO, VCORE, and VHAVDD supplies. It is especially designed for 12V input. For better display quality control, the device also provides Gate-Pulse-Modulation block and temperature compensation for VGH voltage.

     The boost regulator provides TFT source driver AVDD voltage. The integrated N-channel FET operates at a fixed frequency of 750kHz which has a current limit up to 5A and can be adjusted from 13.5V to 19.8V.

     The 3 buck regulators supply system logic power, core volrage power and the half AVDD power for driver IC. Both boost and buck regulators feature internal soft-start function to limit inrush current and use the current mode control to perform fast load transient response.

     The gate-on and gate-off charge pumps provide TFT-LCD gate drivers regulated gate-on and gate-off supplies. The temperature compensation circuit for gate-on voltage is applied. The internal soft-start function is also included.

     The reset function pullsthe reset signal down when detect the input voltage lower than 8.9V.

     The GPM is a flicker compensation circuit to reduce the coupling effect of gate lines; the gate-shaping timing is controlled by the timing-controller to modulate the Gate-On voltage, VGHM. 

     The ANX6862 is available in a thin 40-pin 6x6 mm WQFN green package.