典型應用 RT8452 高電壓大
電流 LED
驅動器控制器的升壓配置中的真正 PWM 調光,適用于降壓-升壓或降壓-升壓拓撲。 RT8452 是一款電流模式 PWM 控制器,設計用于驅動大電流 LED 應用的外部 MOSFET。 LED 電流的
電流檢測放大器閾值為 190mV,可通過一個外部電流檢測
電阻器進行編程。 RT8452 的最大工作輸入電壓為 36V,輸出電壓高達 48V,非常適合降壓、升壓或降壓-升壓操作
說明
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Typical Application True PWM Dimming in Boost Configuration for RT8452 High Voltage High Current LED Driver Controller for Buck-Boost or Buck-Boost Topology. The RT8452 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. With the maximum operating input voltage of 36V and output voltage up to 48V, the RT8452 is ideal for Buck, Boost or Buck-Boost operation