Power Management IC Development Tools 110W Multiple String LED Driver
The is an 110W offline AC to DC LED current driver with power factor correction evaluation module . This design utilizes a three stage approach with a universal input boost PFC stage, a low side buck stage providing a controlled current source and a half bridge DC transformer stage to provide isolation to four LED strings. This converter was designed to support up to four strings of 15 high brightness LED"s in series 58.5V max per string. The converter will provide 500mA average current to each string. The design incorporates an interface for microprocessor control to allow for shutdown into a low power mode <0.5 W and PWM dimming of the LED"s. The boost, buck and DC half bridge multi transformer stages are included on a evaluation module single board assembly.
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- Operates from 90VRMS to 265VRMS
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- Boost follower or fixed output PFC stage
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- PFC disable option
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- Output current disable
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- External or internal PWM dimming option
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- Output isolated from line input
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- Open circuit protection If one LED string fails open the remaining strings stay on
High voltages may cause injury, so please ensure all safety procedures are followed while working