Diodes AL9910通用高压高亮LED驱动方案

Diodes 公司的AL9910/A是PWM高效高压高亮LED驱动器控制集成电路.源电压从85VAC到256VAC,输入电压高达500V. AL9910能以固定频率高达300kHz驱动外接MOSFET,输出电流从几毫安到大于1.0A,效率高于90%,主要应用在DC/DC或AC/DC LED驱动器,RGB背光LED驱动器,平板显示器背光,通用恒流源以及装饰LED照明.本文介绍了AL9910/A主要特性,功能方框图, 典型应用电路图和带与不带无源PFC的典型应用电路图.

UNIVERSAL HIGH VOLTAGE HIGH BRIGHTNESS LED DRIVER、

The AL9910/A is a PWM high-efficiency LED driver control IC. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 85VAC up to 265VAC. The AL9910 controls an external MOSFET at fixed switching frequency up to 300kHz. The frequency can be programmed using a single resistor. The LED string is driven at constant current and provides constant light output and enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A.
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