Switching power circuit and power control method

Details Switching power circuit and power control method Switching power circuit and power control method

2007-05-01

2009-12-08

Nguyen, Matthew V (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S283000

Reexamination Certificate

active

07629782

ABSTRACT:
A switching power circuit having a counter which periodically counts a value between a first value and a second value, a determining unit which continuously determines a third value between the first value and the second value, based on a voltage difference between an output voltage and a reference voltage, a driving unit which alternately switches a first switching element and a second switching element, base on a small and large relation between a counting value of the counter and the third value, and a control unit which resets the counting value of the counter to the first value, based on the voltage difference or a current value at the second switching element.

REFERENCES:
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patent: 7148669 (2006-12-01), Maksimovic et al.
patent: 7456620 (2008-11-01), Maksimovic et al.
patent: 2005/0057238 (2005-03-01), Yoshida
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patent: 2004-304872 (2004-10-01), None
U.S. Appl. No. 12/351,426, filed Jan. 9,2009, Nakamura et al.

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