Lemontree

Single-channel buck converter can drive projector's RGB LEDs by simply adding three power MOSFETs

Overview

introduction

This application note provides a reference design for a low-power projector RGB LED driver. A high-current LED driver based on the single-chip MAX16821 can provide up to 10A current for a set of buck-driven RGB LEDs with an on/off time of less than 1µs. Only one color LED is driven at a certain time, and RGB shares the PWM cycle in proportion.

LED driver technical specifications

Input supply voltage: 10V to 15V
LED driving current: 10A
LED forward bias: 4.5V to 6V
LED current rise/fall time: < 1µs
LED current ripple: 10% peak to peak, maximum

Documentation

Application Note

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-19 05:28:57

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