Non-isolated Buck LED Controller with Active PFC

The SM1502 is a high efficiency step-down converter for driving high-brightness LEDs with high power factor and accurate LED current in a single stage converter. The controller operates using critical conduction mode. It can reduce the MOSFET switching loss and improve the converter efficiency. It can also minimize the inductor value and size. The device integrates power factor correction function and multi protection functions. Protection functions such as under-voltage lock-out, overvoltage protection, short circuit protection, cycle-by-cycle current limit, open lamp detection, short lamp detection and over temperature protection enhance system reliability and safety. The SM1502 is available in a small SOIC-8L package.

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