Charging device with boundary mode control

Details Charging device with boundary mode control Charging device with boundary mode control

2007-11-08

2009-08-11

Ullah, Akm E (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S020000, C363S021010, C363S021120, C363S021180

Reexamination Certificate

active

07573730

ABSTRACT:
A charging device with boundary mode control is disclosed. The charging device includes a transformer, a power switch, a detection circuit and a pulse-width modulation (PWM) controller. The power switch is electrically connected to one end of a primary-side winding of the transformer. The detection circuit is electrically connected to the primary-side winding and the power switch. The detection circuit detects the resonance of the parasitic capacitance of the power switch, thereby generating a detection signal for boundary mode control. The PWM controller generates a pulse-width modulation signal for driving the power switch, and turns on the power switch according to the detection signal.

REFERENCES:
patent: 6038144 (2000-03-01), Matsumoto et al.
patent: 6826063 (2004-11-01), Ichikawa et al.

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