DC-DC converter with switchable control mode
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United States of America Patent
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-
Dec 3, 2002
Grant Date -
Jun 27, 2002
app pub date -
Mar 14, 2001
filing date -
Dec 22, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a voltage drop chopper type DC-DC converter, in an intermediate load area, a pulse train having a low peak value in the neighborhood of the threshold voltage is applied to a power MOSFET, whereby the power MOSFET is given a high ON resistance and turned on. By doing so, the output voltage is controlled by a PAM (pulse amplitude modulation) switch system for reducing the peak value below the supply voltage.
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