Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2004-11-11
2009-11-03
Nguyen, Matthew V (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S222000
Reexamination Certificate
active
07612545
ABSTRACT:
A DC/DC converter includes a switching element which is opened and closed to supply power from an input power supply Vccthrough a coil to an output terminal, which is connected to a load, and to adjust the voltage at the output terminal. The DC/DC converter also includes a coil current detection resistor arranged to detect a coil current, a smoothing capacitor connected to the load side of the coil current detection resistor and arranged to smooth the voltage at the output terminal, a reference current value control circuit arranged to detect the voltage on the coil side of the coil current detection resistor to control a reference current value of the coil current, a clock generator arranged to generate a reference clock, and a feedback circuit arranged to close the switching element in synchrony with the reference clock and to open the switching element when the coil current exceeds the reference current value.
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International Search Report issued in the corresponding International Application No. PCT/JP2004/016720, mailed on Mar. 8, 2005.
Takemura Ko
Umemoto Kiyotaka
Keating & Bennett LLP
Nguyen Matthew V
Rohm & Co., Ltd.
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