TPS65162 - 具有输入到输出集成隔离开关、2 个运算放大器和 GPM 的 4 通道 LCD 偏置

TPS65162是TI德州仪器公司的一款电流感应放大器、I2C/PMBus监控器产品，TPS65162是具有输入到输出集成隔离开关、2 个运算放大器和 GPM 的 4 通道 LCD 偏置，本站介绍了TPS65162的封装应用图解、特点和优点、功能等，并给出了与TPS65162相关的TI元器件型号供参考。

TPS65162 - 具有输入到输出集成隔离开关、2 个运算放大器和 GPM 的 4 通道 LCD 偏置 - 电流感应放大器、I2C/PMBus监控器 - 保护、监控和热插拔 - 德州仪器

产品描述

The TPS65162 is a compact LCD bias IC with two high-speed operational amplifiers for the Vcom 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.

产品特性

8-V to 14.7-V Input Voltage Range
500 kHz / 750 kHz Fixed Switching Frequency
Boost Output Voltage up to 19 V
- 1%-Accurate Boost With 2.8-A Switch Current Overvoltage Protection
Input-to-Output Isolation Switch for Vs Short-Circuit protection for Boost
2.5-A Step-Down Converter
Regulated Positive Charge-Pump Driver VGH
Regulated Negative Charge-Pump Driver VGL
Gate Voltage Shaping for VGH
Soft Start for all Converters
Two Integrated High-Speed Opamps
- 50-MHz, 3-dB Bandwidth
- Slew Rate 55 V / µs
- 215-mA Short-Circuit Current
48 Pin 7x7 mm QFN Package

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