Current control device of a DC-DC switching converter

摘要

A load (21) is fed from a primary supply (22) and also receives a compensating supply (23) via switches (Q1,Q2), a transformer (28) and filtering capacitor (CS). The capacitor current is determined from resistors (RL1, RL2) an adder (35) and compared (36) with a minimum threshold (Imin) the result being used to control the switches (Q1,Q2) through a bistable control unit (45).