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Datasheet for MSL3086/MSL3088

Datasheet for MSL3086/MSL3088 Complete

(file size: 1.81 MB, revision A, updated: 09/2012)
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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.

Key Parameters

Parameter
Value

Interface Type:

I2C (PWM)

Number of Strings:

8

Max Current per String:

60mA

LEDs per String:

10

Max String Match:

3.0%

String Current Global:

R

String PWM Global:

12 bits

Boost:

Internal 625kHz

FETs:

Internal