DC/DC converter with multiple operating modes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 5, 2000
Issued Date -
N/A
app pub date -
Apr 30, 1999
filing date -
Apr 10, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A comparator monitors an output voltage V.sub.out. When an output voltage V.sub.out decreases to a predetermined output voltage or less, the comparator sends a signal that represents this state to a controlling circuit. When the controlling circuit receives the signal, it causes a switching device to be turned on. Thus, a coil current I.sub.L is increased. A hysteresis (window) comparator monitors the coil current I.sub.L. When the coil current I.sub.L reaches a comparison current I.sub.LP, the controlling circuit causes the switching device to be turned off. When the coil current I.sub.L decreases to the comparison current I.sub.LB (where I.sub.LP >I.sub.LB), the controlling circuit references an output signal of the comparator. When the output voltage V.sub.out is lower than the predetermined output voltage, the controlling circuit causes the switching device to be turned on.
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