Initial drive voltage supply control circuit for switching mode

Details Initial drive voltage supply control circuit for switching mode Initial drive voltage supply control circuit for switching mode

1998-06-01

1999-06-01

Nguyen, Matthew

Electric power conversion systems

Current conversion

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

H02M 3335

Patent

active

059093633

ABSTRACT:
An initial drive voltage supply control circuit for an SMPS, comprising a rectifier for rectifying and smoothing an AC voltage inputted by an AC input unit to convert it into a DC voltage, a switching transformer having a primary coil for receiving the DC voltage from the rectifier and secondary and tertiary coils for inducing desired voltages in response to the DC voltage received by the primary coil, an output power controller for supplying or blocking the DC voltage from the rectifier to the primary coil of the switching transformer, an initial drive voltage controller for supplying an initial drive voltage to the output power controller and blocking the initial drive voltage to the output power controller when a normal drive voltage is supplied to the output power controller after the lapse of a predetermined time, a load output unit for rectifying and smoothing the voltage induced in the secondary coil of the switching transformer to output an operating voltage to a load, a drive voltage supply unit for rectifying and smoothing the voltage induced in the tertiary coil of the switching transformer to supply the normal drive voltage to the output power controller, and an error detection feedback unit for detecting the operating voltage from the load output unit and feeding the detected operating voltage back to the output power controller.

REFERENCES:
patent: 3924172 (1975-12-01), Gregorich
patent: 5414610 (1995-05-01), Brainard
patent: 5506764 (1996-04-01), Hon et al.
patent: 5815382 (1998-09-01), Saint-Pierre et al.

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