DC2342A

DC2342A demonstration circuit is a 60V synchronous boost LED controller featuring the LT®3762. It drives single string of LEDs at 2A up to 32V when VIN is between 7 and 28V. It runs down to 4VIN with reduced ILED and can withstand VIN transients as high as 30V. DC2342A runs at approximately 300KHz switching frequency. SSFM can be turned on with a simple jumper, reducing EMI. DC2342A is designed for high power step-up LED controller applications that require excellent efficiency across the VIN range. This demonstration circuit is protected against both open and short LED conditions, each having its own flag. The LT3762 has an input range from 2.5 to 42V. It has an adjustable switching frequency between 100KHz to 1MHz. Enabling SSFM spreads the switching frequency from fSW down to fSW – 30% for reduced EMI. SSFM speed is set by placing a capacitor from the SSFM pin of the LT3762 to ground, and can be disabled by shorting this pin to GND.

Remarques

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