Drives 1 high brightness LED at a constant current of 1000 mA from 5V to 30V input.

The LM3485 design is a buck regulator derived controlled current source designed to drive high power, high brightness LEDs (HBLEDs) at a constant current of 1.0A. The design can accept an input voltage ranging from 5V to 30V and can control the output current delivered to series and/or parallel arrays of HBLEDs as long as the forward voltage of all the LEDs in series is less than 0.9 x Vin. The accuracy of the output current is +-10%.

Please download the whitepaper to view the entire reference design.

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