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The Atmel® MSL3086 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 MSL3086 driver uses a single PWM input to control the LED dimming signals. Additionally, internal registers, available through the I2C interface, optionally control PWM dimming frequency and/or duty cycle.
The MSL3086 driver 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.