LT3474EFE Datasheet PDF - Linear Technology

●DESCRIPTION

●The LT® 3474/LT3474-1 are fi xed frequency step-down DC/DC converters designed to operate as constant-current sources. An internal sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA to 1A, allowing a wide dimming range.

●FEATURES

●True Color PWM™ Delivers Constant Color with 400:1 Dimming Range

●Wide Input Range: 4V to 36V

●Up to 1A LED Current

●Adjustable 200kHz–2MHz Switching Frequency

●Adjustable Control of LED Current

●Integrated Boost Diode

●High Output Current Accuracy is Maintained Over a Wide Range from 35mA to 1A

●Open LED (LT3474) and Short-Circuit Protection

●High Side Sense Allows Grounded Cathode Connection

●Uses Small Inductors and Ceramic Capacitors

●LT3474-1 Drives LED Strings Up to 26V

●Compact 16-Lead TSSOP Thermally Enhanced Surface Mount Package