Regulating power supply for video display apparatus

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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363 97, 363131, 323288, 358190, 315411, H02M 3335

Patent

active

046791310

ABSTRACT:
A regulating power supply for a video display apparatus includes a switching transistor that periodically energizes a transformer winding. Input switching pulses for the transistor are varied in width and frequency to optimize power transfer via the transformer. The charge and discharge rates of a capacitor determine the pulse width and frequency. The capacitor charging current is selectively switched to be connected to the capacitor while the capacitor discharge current is controlled in response to a feedback signal derived from the regulated voltage level.

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