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IntersilISL97691單顆鋰電池4路LED驅(qū)動方案

作者: 時間:2012-08-01 來源:網(wǎng)絡(luò) 收藏

驅(qū)動器,可用于需要模擬調(diào)光的手機顯示器和3D顯示屏.輸入電壓2.4V-5.5V,提供4路40mA電流和高達26V電壓,電流匹配±2.5% ,具有故障保護,主要用在平板電腦,筆記本PC和智能手機顯示器背光,移動顯示器2D或3D 背光.本文介紹了ISL主要特性,方框圖,典型應用電路圖,PCB布局參考圖和故障保護電路圖.

本文引用地址:http://m.butianyuan.cn/article/186015.htm

ISL主要特性:

• Operating Input Voltage 2.4V to 5.5V - No Need for Additional Supplies

• 4 x 60mA (Note 1) and 4 x 40mA (Note 2) LED Current

• 2 Groups of Independent Analog and PWM Current Controls

- 1-Wire Interfaces for 6-bit Analog Dimming

- PWM Inputs for PWM Dimming

- 0.005% Minimum PWM Dimming Duty Cycle at 100Hz

• Low 1mA Operating Current

• ±2.5% Current Matching

• Adjustable Switching Frequency from 400kHz to 1.5MHz

• Fault Protection

- OVP, OTP, Channel Open/Short Circuit Protections

ISL應用:

• Tablet, Notebook PC and Smart Phone Displays LED Backlighting

• Mobile Displays for 2D or 3D LED Backlighting

圖1.ISL97691方框圖


圖2.ISL97691典型應用電路圖

圖3.ISL97691 PCB布局參考圖

圖4.ISL97691簡化故障保護電路圖

更多資訊請關(guān)注:21ic模擬頻道



關(guān)鍵詞: IntersilISL 97691 LED 鋰電池

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