Switching power supply device and switching method

Details Switching power supply device and switching method Switching power supply device and switching method

2007-05-01

2007-05-01

Laxton, Gary L. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S127000

Reexamination Certificate

active

11285694

ABSTRACT:
A current flowing through a reactor flows through a resistor, which generates a voltage in accordance with the value of the current. As the voltage generated by the resistor is greater than or equal to the threshold of a transistor, the transistor is in an on state. As the current flowing through the reactor decreases and the voltage generated by the resistor becomes lower than the threshold of the transistor, the transistor turns off and an NMOS turns on. Accordingly, the gate voltage of an NMOS is decreased by a diode, ensuring that the NMOS is turned off before the current flowing through the secondary winding of a transformer becomes zero.

REFERENCES:
patent: 4945465 (1990-07-01), Marinus et al.
patent: 6061255 (2000-05-01), Chik et al.
patent: 6353544 (2002-03-01), Lau
patent: 6791849 (2004-09-01), Nakayama
patent: 2004-135415 (2004-04-01), None

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