Abstract
In this article, the design and implementation of a digital controller for universal telecommunication power supplies based on parallel-operated, dual 8-b microcontrollers, are presented. The overload and output short-circuit protection features are also software controlled. The proposed controller is successfully tested in the field on six parallel operating, 1.8 kW, 0-70 V telecommunication power supplies, each incorporating a phase-shifted, full-bridge DC/DC converter operated from a preregulated bus. Experimental results on digitally-controlled load current sharing, current limiting, derating, and output short-circuit protection are presented.
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