Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2006-03-21
2006-03-21
Vu, Bao Q. (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S284000
Reexamination Certificate
active
07015678
ABSTRACT:
Actual switching DC—DC converters have disadvantages in specific operating regions due to different reasons for power losses. Large switching transistors provide favorable efficiency at high output currents, but need high currents to charge/discharge the switching transistor's gate, resulting in poor efficiency at low output currents. Small transistors are more efficient at low currents, but are poor at high currents. The disclosed invention changes the size of the MOSFET switching transistors proportional to the output current, thus combining the efficiency of small transistors at low output currents and of large transistors at high output currents.
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Ackerman Stephen B.
Dialog Semiconductor GmbH
Saile George D.
Vu Bao Q.
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