Pulse width modulated converter circuit with linear sawtooth generator - has input voltage compensation with second generator fed from input and synchroniser

摘要

Pulse width modulation converter circuit, which converts the input direct voltage into a constant output voltage. A regulating circuit produces an output voltage from which the regulating voltage is derived. There is an input voltage compensating circuit (CL) which is coupled to the control circuit and a sawtooth generator which is synchronised to the input frequency. The input compensation circuit has a second generator fed from the input direct voltage and generates a voltage which is a function of the input direct voltage. The synchroniser contains a comparator (A2) which is coupled to the second generator.