com LT3474/LT3474-1 Step-Down 1A LED Driver FEATURES n n n n n n n n n n n n DESCRIPTION The LT®3474/LT3474-1 are fixed 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.
Unique PWM circuitry allows a dimming range of 400:1, avoiding the color shift normally associated with LED current dimming.
The high switching frequency offers several advantages, permitting the use of small inductors and cerami...

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