DC1909A

DC1909A demonstration circuit is a 150KHz, 60V current mode DC/DC step-down converter with accurate current limit featuring the LT®3840. The circuit operates from a VIN range of 4.5V to 60V, survives an 80V transient, and outputs 3.3V at 20A (66W). An integrated buck-boost switching regulator generates a 7.5V bias supply voltage for MOSFET gate drive and IC power to increase the overall efficiency by reducing the power loss. A soft-start feature controls the output voltage slew rate at start-up, reducing current surges and voltage overshoots. The modes of operation (Burst Mode®, discontinuous current mode and continuous current mode) are jumper selectable. Both Burst Mode operation and discontinuous current mode increase the efficiency at light loads. Continuous current mode will maintain a constant switching frequency regardless of the load current. This board is suitable for a wide range of automotive, telecom, industrial, and other applications.

附註

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party