DC-DC converter

Details DC-DC converter DC-DC converter

2006-01-10

2006-01-10

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S020000, C323S276000

Reexamination Certificate

active

06985369

ABSTRACT:
A DC-DC converter achieves a high level of a signal superimposed in an AC manner onto the output of an insulator such as a photocoupler, and there are very few limitations in the aspects of constant design, phase correction, starting characteristics, and short-circuit protection. A secondary-side control circuit detects an output voltage, and feeds back a control signal to a drive control circuit on the primary side via a photocoupler. The photocoupler insulates the primary side of a DC-DC converter from the secondary side thereof, wherein the control signal output from the secondary-side control circuit is transmitted to the primary side. The output signal of an auxiliary power-supply circuit is superimposed in an AC manner onto the control signal via a coupling capacitor. The drive control circuit has a configuration in which a pulse control signal is applied to a switching element in order to stabilize the output voltage of a secondary-side circuit on the basis of the control signal.

REFERENCES:
patent: 4758937 (1988-07-01), Usui et al.
patent: 4763236 (1988-08-01), Usui
patent: 5661642 (1997-08-01), Shimashita
patent: 0 287 109 (1988-04-01), None
patent: 08-331844 (1996-12-01), None

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