Variable input voltage DC to DC converter with switching transistor drive current regulator
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United States of America Patent
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Oct 4, 1988
Issued Date -
N/A
app pub date -
Apr 24, 1987
filing date -
Nov 4, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching transistor. The base drive regulator circuit thereby enables the DC to DC converter to operate at high levels of efficiency over wide ranges of DC input voltages such as twelve to forty-eight volts DC.
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