General Description

The Atmel LED Driver MSL3085 compact, high power 8 LED strings controller uses external MOSFETs to sink up to 350mA per string, with current accuracy and matching better than ±1.5. The MSL3085 drives eight parallel strings of LEDs, and offers fault detection and management of open and short circuit LEDs.

Key Features

• 12-bit PWM String Dimming

• Fast, 1MHz I2C Serial Interface Supports up to Eight Devices per Bus

• 8-bit Adaptive Power Correction Maximizes Efficiency of up to Two String Power Supplies

• Multiple MSL3085s Share String Power Supplies and Automatically Negotiate the Optimum Supply Voltage

• External MOSFETs for high Voltage and/or Current

• Drives up to Eight Parallel LED Strings

• Supports Adaptive, Real-time Area Dimming for Highest Dynamic Range in LCD TVs and Monitors

• Programmable String Phase Reduces Motion Blur and Improves Efficiency

• Global Intensity Control via Serial Interface

• ±1.5 Current Accuracy and Current Balance

• Video Frame (VSYNC) and Line (HSYNC) Sync Inputs

• Sync Loss Detectors Optionally Disable LED Strings

• EEPROM Saves Power-on Default Settings

• LED Open Circuit and Short Circuit Fault Detection

• Individual Fault Detection Enable for Each String

• Over-temperature Shut-Off Protection

• Broadcast Write Simplifies Configuration

• -40°C To +105°C Operating Temperature Range

Applications

Long Life, Efficient LED Backlighting for:

• Televisions and Desktop Monitors

• Medical and Industrial Instrumentation

• Automotive Audio-visual Displays

Channel Signs

Architectural Lighting