Regulator control system
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United States of America Patent
Stats
-
Oct 7, 1986
Grant Date -
N/A
app pub date -
Apr 30, 1984
filing date -
Apr 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switching power supply for converting an input voltage to a different output voltage includes a power switch for producing a sequence of pulses from the input voltage, an output filter for filtering said pulses and for producing an output voltage from the filtered pulses, and means for sensing the output voltage and for controlling the value of the output voltage to a specified value. The power supply includes means for responding to a reduction in the input voltage beneath a normal value and for increasing the duty cycle of the sequence of pulses from the power switch in response thereto. Structure is provided for automatically controlling the frequency of the sequence of pulses to a selected value and for overriding the automatic control of this frequency so as to decrease this frequency in the event the load connected to the power supply draws too much current. Circuitry is provided to minimize off time in each period of the pulse sequence under 'brown-out' conditions.
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