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The Atmel® MSL3088 8-channel LED driver features an integrated boost regulator controller which offers a complete solution to drive up to eight parallel LED strings at up to 40V. The LED current sinks control up to 60mA peak for up to 19W of LED power. A single resistor sets LED current with string matching and accuracy within ±3%.
The advanced integrated pulse-width modulation (PWM) circuitry allows up to 4095:1 dimming, and offers simple PWM dimming control. The MSL3088 driver has two inputs—one for frequency and the other for duty cycle. Additionally, internal registers, available through the I2C interface, optionally control PWM dimming frequency and/or duty cycle.
The MSL3088 features phase-shifted PWM dimming to reduce the boost regulator transient response. The integrated fault detection circuitry detects and acts upon string open-circuit and LED short-circuit faults, boost regulator over-voltage faults, and die over-temperature faults.
A proprietary Efficiency Optimizer maintains sufficient boost regulator output voltage for proper LED current while minimizing power use.