TPS65178 - 用于电视的具有 6 通道伽玛缓冲器、Vcom 基准和动态增益的完全可编程 LCD 偏置 IC

TPS65178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，TPS65178是用于电视的具有 6 通道伽玛缓冲器、Vcom 基准和动态增益的完全可编程 LCD 偏置 IC，本站介绍了TPS65178的封装应用图解、特点和优点、功能等，并给出了与TPS65178相关的TI元器件型号供参考。

TPS65178 - 用于电视的具有 6 通道伽玛缓冲器、Vcom 基准和动态增益的完全可编程 LCD 偏置 IC - 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 TPS65178 provides a simple and economic power supply solution for a wide variety of LCD bias applications.The device provides all supply rails needed by a TFT-LCD panel but also 6 gamma references, a supply rail for LVDS support, as well as a Vcom reference and its programmable dynamic gain. The solution is delivered in a small 6x6mm QFN package.

The TPS65178 provides a simple and economic power supply solution for a wide variety of LCD bias applications. The device provides all supply rails needed by a TFT-LCD panel. VCC, VCORE and RST for the T-Con. VDD and HVDD for the Source Driver. VGH and VGL for the Gate Driver or the Level Shifter. The VGH voltage can be compensated for low and high temperatures, if GIP (Gate In Panel) technology is used.The transition from one programmed VGH value to another is made using an external thermistor connected to the IC. In addition, a 6-channel Gamma Buffer is integrated as well as the VCOM reference and programmable gain (fixed or dynamic). A VEPI supply rail is also integrated. All output rails and delay times are programmable by a two-wire interface: a single BOM (Bill of Material) can cover several panel types and sizes whose desired output levels can be programmed in production and stored in a non-volatile memory embedded into the TPS65178. VCORE, VEPI and HVDD are generated by synchronous buck converters which support chip inductors for an optimized solution size. The solution is delivered in a small 6x6mm QFN package.

产品特性

8.6V to 14.7V Input Voltage Range
Boost Converter VDD: 12.8V…19V (6-Bit)
Integrated Input-to-Output Isolation Switch
Buck Converter HVDD: VDD tracking
Buck Converter VCC: 3.0V…3.7V (3-Bit)
Buck Converter VCORE: 0.9V…2.4V (4-Bit)
Buck Converter VEPI: 0.9V…2.4V (4-Bit)
Positive Charge Pump VGH:
- 19V…34V for Low Temperature (4-Bit)
- 17V…32V for High Temperature (4-Bit)
Temperature Compensation for VGH
Negative Charge Pump VGL: –1.8V…–8.1V (6-Bit)
6-Ch Gamma Buffer:
- 3-Ch: VDD…HVDD (9-Bit)
- 3-Ch: HVDD...GND (9-Bit)
9-Bit VCOM Reference
2-Bit VCOM Gain
Selectable Dynamic Gain
Reset Signal With Programmable Delay Time
Programmable Sequencing Delays (3 × 3-Bit)
Thermal Shutdown
48-Pin 6-mm × 6-mm QFN Package
APPLICATIONS
- LCD TVs
- LCD Monitors

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