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Electronics Manufacturing & Production Handbook 2017


 

DC-DC converter runs in CV or CC mode
15 November 2017, Power Electronics / Power Management

The A7431 is a wide input voltage, high efficiency step-down DC-DC converter that operates in either constant voltage (CV) or constant current (CC) mode. It provides up to 3 A output current at 125 kHz switching frequency.

A7431 eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and adaptors with accurate current limit. It achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss on the additional current sensing resistor.

The device has an OVP pin for output over-voltage protection, and integrates adaptive gate drive to achieve excellent EMI performance passing the EN55022 Class B EMC standard without adding additional EMI components, while maintaining high conversion efficiency. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.

The A7431 is available in a PSOP8 package and requires very few external components for operation.


Credit(s)
Supplied By: ICORP Technologies
Tel: +27 11 781 2029
Fax: 086 555 7808
Email: enquiries@icorpgroup.co.za
www: www.icorpgroup.co.za
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