The TPS65162 is a compact LCD bias IC with two high-speed operational amplifiers for the V_com supply. The high current capability of the device is ideal for large LCD-monitor and LCD-TV applications.

The TPS65162 generates all four voltage rails for a TFT LCD (Vs, Vlogic, VGH and VGL) and includes two op-amps to generate the VCOM supply rail. An input-to-output isolation switch is integrated into the device, providing short-circuit protection for the boost converter. A current-limit function is implemented in the input-to-output isolation switch to allow soft turn-on during start-up. The device also features gate voltage shaping for improved TFT-LCD picture quality. The device consists of a boost converter to provide the source voltage Vs, and a step-down converter to provide the logic voltage for the system. A positive and a negative charge-pump driver provide adjustable regulated output voltages VGH and VGL to bias the TFT. Both boost and buck converter, as well as the charge-pump drivers, operate with a fixed switching frequency of 500 kHz or 750 kHz, selectable by the FREQ pin. The device includes adjustable power-on sequencing. The safety features of the device are overvoltage protection for boost converter, short-circuit protection for Vs, Vlogic and VGH, and thermal shutdown.

德克萨斯仪器tps65162rgzr
这是一tps65162 IC与VCOM提供两个高速运算放大器小型LCD偏置。该设备的高电流能力的大型液晶显示器和液晶电视应用的理想选择。
的tps65162为TFT液晶产生所有四个电压轨（VS，VLOGIC，VGH和VGL）和包括两个运算放大器产生VCOM供电轨。输入输出隔离开关集成到设备中，为升压转换器提供短路保护。在输入输出隔离开关中实现电流限制功能，以便在启动期间允许软启动。该器件还具有改进的TFT - LCD图像质量的栅极电压整形。该装置由一个升压转换器来提供源电压VS，以及一个降压转换器来为系统提供逻辑电压。正、负电荷泵驱动器偏置TFT提供可调稳压输出电压VGH和VGL。两个升压和降压转换器，以及电荷泵驱动，采用固定开关频率500 kHz或750 kHz的频率，通过引脚选择。该装置包括可调节的开机顺序。该装置的安全特性的Boost变换器的过电压保护，短路保护和VS，VLOGIC VGH，和热关断。