DC-DC converter circuit having correction circuit for outputting voltage level inversely proportional to input voltage
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United States of America Patent
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-
Feb 28, 2006
Grant Date -
Jun 24, 2004
app pub date -
Dec 12, 2003
filing date -
Dec 17, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A DC-DC converter circuit for stabilizing the output voltage of the secondary side by correcting the input voltage by using a simple circuit, where no state measurement circuit is necessary at the secondary side. The circuit includes a transformer; a switching circuit including a main switching element which is connected to the primary winding of the transformer in series and has a control terminal for controlling the main switching element, wherein the main switching element is PWM-controlled so as to stabilize an output voltage of the secondary side; a driving circuit for generating PWM driving pulses; and a correction circuit for outputting a voltage whose level is in inverse proportion to an input voltage of the DC-DC converter circuit. An output of the driving circuit is connected to the control terminal of the main switching element and to the correction circuit.
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