Power supply circuit
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United States of America Patent
Stats
-
Aug 11, 1987
Grant Date -
N/A
app pub date -
Aug 13, 1986
filing date -
Aug 23, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A direct-current power supply circuit includes a series-connected switch (TR1) and an inducator (L) connected together with a flywheel diode (D) across an input voltage supply (V.sub.s). A transformer (TX) has a primary winding connected to the inductor (L) and the diode (D) by way of a bridge-connected network of switching devices (TR2-TR5). A reservoir capacitor (c) is connected to a secondary winding of the transformer (TX) by way of a full-wave rectifier (DB), and a load (LD) may be connected to the reservoir capacitor (c). Control means (CM) are provided to control the operation of the series-connected switch (TR1) and the network of switching devices (TR2-TR5) so that each cycle of operation transfers an equal amount of charge to the reservoir capacitor (c) regardless of variations in the input voltage (V.sub.s) or load conditions.
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