Intersil汽车TFT-LCD显示器电源方案

        Intersil公司的ISL78010是汽车电子级TFT-LCD显示器电源，它集成一个升压转换器和2A FET，两个用来产生VON 和 VLOGIC的正向LDO，以及用来产生VOFF的负向LDO。升压转换能编程在P模式工作，以得到最佳的瞬态响应，或工作在PI模式，以改善负载的调整率。

        本文介绍了ISL78010的主要性能，方框图，升压稳压器方框图和典型的应用电路图以及手提/便携式显示器应用方案（LCD/OLED）。

       INTERSIL Automotive Grade TFT-LCD Power Supply
       The ISL78010 is a multiple output regulator for use in all TFT-LCD automotive applications. It features a single boost converter with an integrated 2A FET, two positive LDOs for VON and VLOGIC generation, and a single negative LDO for VOFF generation. The boost converter can be programmed to operate in either P-mode for optimal transient response or PI-mode for improved load regulation.

       The ISL78010 includes fault protection for all four channels. Once a fault is detected on either the VBOOST, VON or VOFF channels, the device is latched off until the input supply or EN is cycled. If a fault is detected on the VLOGIC channel, the device is latched off until the input supply is cycled. The VLOGIC channel is not affected by the EN function. The ISL78010 also includes an integrated start-up sequence
       for VLOGIC, VBOOST, VOFF, then VON or for VLOGIC, VOFF, VBOOST, and VON. The latter sequence requires a single external transistor. The timing of the start-up sequence is set using an external capacitor. The ISL78010 comes in a 32 Ld 5x5 TQFP package and is specified for operation over a -40°C to +105°C temperature range.

                                                                               ISL78010外形图

       主要特性：
       2A current FET
       3V to 5V input
       Up to 20V boost output
       1% regulation on boost output
       VLOGIC-VBOOST-VOFF-VON or VLOGIC-VOFF-VBOOST-VON sequence control
       Programmable sequence delay
       Fully fault protected
       Thermal shutdown
       Internal soft-start
       32 Ld 5x5 TQFP packages
       Pb-free plus anneal available (RoHS compliant)

       应用：
       All Automotive LCD Displays

图1。ISL78010方框图



图2。升压稳压器方框图

                                                                      图画。ISL78010应用电路图。
     手提/便携式显示器应用方案 (LCD/OLED)

       详情请见数据表：

       http://mcuol.com/download/upfile/fn6501.pdf

本文来源：Intersil公司     作者：

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