Transformerless fast current limiter with symetry correction for a switched-mode power supply
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United States of America Patent
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-
Oct 6, 1981
Grant Date -
N/A
app pub date -
Dec 4, 1979
filing date -
Dec 4, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switched mode power supply employs a pulse width modulation controlled DC-to-DC converter to change a first voltage from a source of DC power into a regulated power source providing direct current at a second DC voltage. A transformerless current-sensing device is adapted for connection in the path between said source and said converter and provides a control signal which is representative of the current flowing in said path. A current-limiter control circuit is responsive to said control signal and provides an enabling output state when the sensed-current exceeds a predetermined value. The enabling state overrides the pulse width modulator control and inhibits the converter, thus terminating the output pulse when the sensed current exceeds said predetermined value.
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