MSL2100BR

Atmel LED Driver-MSL2100 8-string, High-power, White or RGB LED Drivers for TVs, Monitors, or Intelligent Solid-state Lighting Datasheet Brief Atmel LED Driver-MSL2100 8-string, High-power, White or RGB LED Drivers for TVs, Monitors, or Intelligent Solid-state Lighting General Description The Atmel® LED Driver MSL2100 compact, highpower LED string driver uses external MOSFETs to provide up 1A per string, with current accuracy and matching better than ±1%. The MSL2100 drives eight parallel strings of LEDs, and offers fault detection and management of open and short circuit LEDs. The MSL2100 features a 1MHz I2C serial interface. The interface supports video frame-by-frame LED string intensity control for up to 16 interconnected devices, allowing active area dimming when used for video displays. The advanced PWM engine synchronizes with the video signal, and offers phase shifted string drive, virtually eliminating waterfall noise and motion blur. The MSL2100 adaptively controls up to three DC-DC converters, which power the LED strings, using patented Atmel's Driver Adaptive SourcePower™ technology. These Efficiency Optimizers minimize power use while maintaining LED current accuracy, and allow up to 16 interconnected devices to automatically negotiate the optimum power supply voltages. A unique combination of peak current control and pulse width dimming management offers simple full-screen brightness control, versatile area dimming, and a consistent white point. LED string current is set for each string using a current sense (FET source) resistor. LED current is also digitally controlled for all eight LED strings. Global string drive pulse width is adjusted with a 6-bit global intensity register, and individual string pulse width is modulated with 8-bit control. Additionally, the MSL2100 optionally throttles back the PWM on time of all strings when the temperature of the LEDs exceeds a programmable threshold. The MSL2100 monitors for string open circuit, LED short circuit, loss-of-sync and over temperature faults, and provides a hardware fault output to notify the MCU. Detailed fault status and control are available through the serial interface. Additionally, the MSL2100 includes an on-chip EEPROM that allows the power-up default register settings to be customized via the serial interface. The MSL2100 is offered in a 6 x 6 x 0.85mm, 48-pin QFN package, and operates over a -40°C to +85°C temperature range. Applications • Edge-lit LED Backlit TVs • High-contrast Monitors • Medical and Industrial Displays • High-power LED Arrays • Multi-string LED Lighting • Solid-State Lighting (SSL) Ordering Information PART MSL2100BR DESCRIPTION 8-Ch LED driver PACKAGE 48 pin, 6x6x0.85mm QFN 2 Atmel LED Driver-MSL2100 Atmel LED Driver-MSL2100 8-string, High-power, White or RGB LED Drivers for TVs, Monitors, or Intelligent Solid-state Lighting Key Features • 8-bit PWM String Dimming • Fast, 1MHz I2C/SMBus Interface Supports up to 16 Devices per Bus • 4-Bit Adaptive Power Correction Maximizes Efficiency of up to Three Power Supplies • External MOSFETs allow >0.5A LED String Current • Drives up to Eight Parallel High Power LED Strings • Multiple MSL2100s Share String Supplies and Automatically Negotiate Optimum Voltages • Supports Adaptive, Real-time 2-D Area Dimming for Highest Dynamic Range LCD TVs and Monitors • Programmable String Phase Virtually Eliminates Motion Blur and Improves Efficiency • Global LED Intensity Control via Serial Interface • Supports Direct PWM Control of all LED Strings with a Single PWM Input Signal • ±1% Current Accuracy and Current Balance • Video Frame (VSYNC) and Line (HSYNC) Sync Inputs • Sync Loss Detectors Optionally Disable LED Strings • Internal EEPROM Allows Custom Power-up Default Settings • String Open Circuit and LED Short Circuit Fault Detection •