AC/DC converter using a non-latch type switching device

Details AC/DC converter using a non-latch type switching device AC/DC converter using a non-latch type switching device

1994-10-13

1997-07-08

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323285, 323289, 363 89, G05F 140

Patent

active

056465149

ABSTRACT:
An AC/DC converter includes a rectifying circuit, a main switching device constituted by an N-channel IGBT or an N-channel FET, a control circuit, a booster circuit, and a series power supply circuit. The rectifying circuit rectifies a half wave of an input AC voltage. One end of the current path of the main switching device is supplied with a half-wave rectifying output from the rectifying circuit. The control circuit turns on the main switching device when a voltage between the gate and the other end of the main switching device exceeds a first level, and turns off the main switching device when the voltage exceeds a second level which is higher than the first level. The booster circuit boosts the voltage between the gate and the other end of the main switching device to a level which is higher than the second level when the voltage exceeds the first level. The series power supply circuit has an input terminal to which the other end of the current path of the main switching device is connected, and outputs a DC voltage.

REFERENCES:
patent: 3265956 (1966-08-01), Schlabach
patent: 4806844 (1989-02-01), Claydon et al.
patent: 5126652 (1992-06-01), Carlin
patent: 5430637 (1995-07-01), Buck
"World-Wide Single Chip Power Supply", Produced by Harris Semiconductor, HV-2405E, (1991), File No. 2487, pp. 1-3.

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