Linear Technology LT3955
LED Converter
FEATURES
nn 3000:1 True Color PWM™ Dimming for LEDs nn Wide VIN Range: 4.5V to 60V nn Rail-to-Rail Current Sense Range: 0V to 80V nn Internal 80V/3.5A Switch nn Programmable PWM Dimming Signal Generator nn Constant Current (±3%) and Constant-Voltage (±2%) Regulation nn Accurate Analog Dimming nn Drives LEDs in Boost, SEPIC, CUK, Buck Mode, Buck-Boost Mode, or Flyback Configuration nn Output Short-Circuit Protected Boost nn Open LED Protection and Reporting nn Adjustable Switching Frequency: 100kHz to 1MHz nn Programmable VIN UVLO with Hysteresis nn C/10 Indication for Battery Chargers nn Low Shutdown Current: <1µA nn Thermally Enhanced 5mm × 6mm QFN PackageAPPLICATIONS
nn High Power LEDs nn Output Short-Circuit Protected Boost nn Battery and SuperCap Chargers nn Accurate Current Limited Voltage Regulators LT3955 60VIN LED Converter with Internal PWM GeneratorDESCRIPTION
The LT®3955 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It features an internal low side N-channel MOSFET rated for 80V/3.5A.