MSL2021_14 Datasheet, PDF (1/41 Pages) ATMEL Corporation – Atmel LED Drivers

Atmel LED Drivers
MSL2021
2-String LED Driver with Built-In Color Temperature
Compensation and Adaptive Headroom Control for High
CRI LED Luminaires
Features
 Dual-string LED driver for 2-color or unequal VF LEDs
 PWM dimming with 180° phase shift of LED strings
 Programmable look-up table for color temperature compensation
 Main LED string driven by linear current controller
 Drives external N-channel MOSFET
 ± 3% current accuracy, no ripple current
 Adaptively controls headroom of both AC/DC and DC/DC, isolated or non-isolated
topology
 Wide PWM dimming range with 12-bit precision
 8-bit DAC for peak current control
 Color-adjust LED string uses floating buck controller
 Drives external N-channel MOSFET
 Temperature color compensation using programmable look-up table
 Over 100:1 dimming range with 8-bit precision
 8-bit DAC allows changing current sense threshold
 Open and short LED protection
 Over-temperature fault detection
 Operates stand-alone or with a microcontroller
 Open-drain fault indicator output
 -40°C To +105°C operating temperature range
Typical Applications
 General and Architectural Lamps
 High CRI LED Fixtures
 Down Lights and Recessed Lights
 PAR Lamps
42062A–LED–02/2013