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.
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
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