Intersil公司的ISL78010是用在汽车电子中TFT-LCD多个输出的稳压器,它是集成了2A FET,两个用于产生VON 和VLOGIC正LDO和一个用于产生VOFF 的负LDO的升压转换器.升压转换器可编程,以工作在优化瞬态响应的P模式或改善负载调整性能的PI模式.本文给出了ISL78010的主要特性,方框图,典型应用电路图以及几种LCD屏的应用方案.

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.

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)



图1.方框图



图2.升压稳压器的方框图



图3.典型应用电路图.
下面列出了几种应用方案:
图4.手提/便携式显示器(LCD/OLED)应用方案:



图5:14吋到24吋LCD屏应用方案



图6.小于14吋的中小型LCD屏应用方案



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详情请上网:

>http://www.intersil.com/data/fn/fn6501.pdf

来源：中电网