ANALOG DEVICES DC2548A Demonstration Board, LT8672EMS#PBF, Active Rectifier Controller

DC2548A demonstration circuit is an active rectifier with reverse protection featuring the LT®8672. The demo board is designed for 5A load current. The input voltage range of the LT8672 is -40V to +42V. Two clamping diodes, D1 and D2, are used on the board to protect the IC from overvoltage spikes at the input, thus limiting the application�s DC input voltage range to -15V and +35V. The voltage drop on the MOSFET is 20mV in regulation. The LT8672 can rectify input ripple with an amplitude of 6VP-P and a frequency of up to 50KHz, or with an amplitude of 2VP-P and a frequency of up to 100KHz. High frequency ripple should not be applied at full load current for more than a few minutes, otherwise C5 may overheat. The demo board allows installation of an EMI filter at the output. To use the EMI filter, install L2, C7, and remove C5 on the board. In addition, multiple MOSFET footprints are provided on the backside of the board, making it convenient to use other MOSFETs.

Notes

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