Current-balance switching regulator
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United States of America Patent
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-
Mar 27, 1990
Grant Date -
N/A
app pub date -
Feb 21, 1989
filing date -
Feb 27, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A current-balance switching regulator in which a plurality of switching power source portions are connected in parallel for the purpose of supplying a stabilized output voltage to a load. Each of the switching power source portions includes a switching control portion for controlling a switching element connected to the primary side of a transformer in accordance with the output voltage on the secondary side of the transformer. Current is detected on the primary side of the portions. When a current unbalance is detected, current balance is arranged by adding the amount of unbalance equally among the portions, so concentration of the load to a particular portion can be prevented. As a result of such averaging, the life of each portion can be lengthened. The portions are connected so that one is made a master and the rest are slaves, so the output voltage can be determined by a variable resistor or the like. A limiter is provided to limit the amount of unbalance added, and an integrator is provided so the amount of unbalance added is smooth so that operation is stabilized.
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