Switching power supply with input voltage reduction detection

Details Switching power supply with input voltage reduction detection Switching power supply with input voltage reduction detection

1998-05-28

1999-06-29

Sterrett, Jeffrey

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 21, 363 56, H02M 3335

Patent

active

059177144

ABSTRACT:
A switching power supply which takes out an output current from a secondary winding when a switching circuit for switching a current flowing through a primary winding is turned off and supplies a DC output to a load device having a control input for decreasing an amount of consumption power thereof. The switching power supply includes a voltage reduction detection circuit for detecting a voltage generated at the secondary winding when the switching circuit is in an on-state and for outputting to the control input a reduction signal representing reduction of an input voltage of the primary winding side when the detected voltage is out of a predetermined range.

REFERENCES:
patent: 3675115 (1972-07-01), O'Loughlin
patent: 5291386 (1994-03-01), Wu
patent: 5453921 (1995-09-01), Shutts
patent: 5825638 (1998-10-01), Shutts

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