Power converter circuitry and method

Details Power converter circuitry and method Power converter circuitry and method

2005-07-12

2005-07-12

Patel, Rajnikant B. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S211000, C361S056000, C361S086000

Reexamination Certificate

active

06917188

ABSTRACT:
A switching power supply controller coupled to a first switching power supply circuit and a second switching power supply circuit, the controller sensing voltages provided to the first switching power supply circuit and the second switching power supply circuit. Based on voltages sensed, the switching power supply controller provides signals to operate the second switching power supply in either a first or a second mode of operation. In one of the modes of operation, the second switching power supply includes a transistor which is coupled between a first source of electrical potential and an input terminal of the first switching power supply. If switching power supply controller determines that the magnitude of the first source of electric potential is sufficient to operate the first switching power supply, the switching power supply controller provides a control signal to turn on the transistor continuously.

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