Switching power source device
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United States of America Patent
Stats
-
May 15, 1990
Grant Date -
N/A
app pub date -
Apr 28, 1988
filing date -
May 7, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switching power source device provides a desired AC/DC output by producing a pulse width-modulated waveform through ON-OFF control of a pair or pairs of switching elements connected in series with an input power source, eliminating high-frequency components of the pulse width-modulated waveform with a smoothing choke. The switching power source device is configured so that the input power source will not be short-circuited and consequently suffer a voltage and/or current surge, even when both switching elements in the pair assume the ON status at the same time by dividing the smoothing choke into two portions. The two portions of the smoothing choke are connected in series with the input power source when the switching elements in the pair assume the ON status at the same time.
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