TPS65160中文资料4 通道 LCD 偏置（2.8A 最小升压电流限制高达 20V，2A 最小降压电流限制）数据手册TI规格书

描述 Description

The TPS65160 offers a compact power supply solution to provide all four voltages required by thin-film transistor (TFT) LCD panel. With its high current capabilities, the device is ideal for large screen monitor panels and LCD TV applications. The device can be powered directly from a 12-V input voltage generating the bias voltages VGH and VGL, as well as the source voltage VS and logic voltage for the LCD panels. 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 VGL and VGH to bias the TFT. Both boost and step-down converters, as well as the charge-pump driver, operate with a fixed switching frequency of 500 kHz or 750 kHz, selectable by the FREQ pin. The TPS65160 includes adjustable power-on sequencing. The device includes safety features like overvoltage protection of the boost converter and short-circuit protection of the buck converter, as well as thermal shutdown. Additionally, the device incorporates a gate drive signal to control an isolation MOSFET switch in series with VS or VGH. See the application circuits at the end of this data sheet.

特性 Features

• 8-V to 14-V Input Voltage Range
• VS Output Voltage Range up to 20 V
• 1% Accurate Boost Converter With 2.8-A Switch Current
• 1.5% accurate 1.8-A Step-Down Converter
• 500-kHz/750-kHz Fixed Switching Frequency
• Negative Charge Pump Driver for VGL
• Positive Charge Pump Driver for VGH
• Adjustable Sequencing for VGL, VGH
• Gate Drive Signal to Drive External MOSFET
• Internal and Adjustable Soft Start
• Short-Circuit Protection
• 23-V (TPS65160) Overvoltage Protection
• 19.5-V (TPS65160A) Overvoltage Protection
• Thermal Shutdown
• Available in HTSSOP-28 Package