The LP6281 is a programmable multi-channel power converter with integrated one channel VCOM buffer and fourteen channel gamma buffers for TFT LCD panel.
The LP6281 contains one VIO buck converter for T-CON power and one AVDD boost converter to provide the voltage of source driver, HAVDD OP, VCOM OP and Gamma buffer. Moreover, one Positive charge pump / boost (VGH) and one negative charge pump / inverting (VGL) are for the level shifter or gate driver.
The AVDD has isolation switch function for AVDD power on sequence. In addition, the VGH, VGL and VCOM have Negative temperature compensation(NTC) function. All output voltage can be programmed by IIC interface and integrated programmable non-volatile memory.
The LP6281 also integrated protection functions including over voltage protection (OVP), under voltage protection (UVP), short circuit protection (SCP), over current protection (OCP), over temperature protection (OTP) and under-voltage lockout (UVLO).
The package of LP6281 is QFN-46 (4.5mm x6.5mm).