Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2008-09-02
2010-06-22
Sterrett, Jeffrey L (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S285000, C323S351000
Reexamination Certificate
active
07741820
ABSTRACT:
A PWM controller for controlling a switching voltage regulator comprises a first comparator, a second comparator and a third comparator. The first comparator is configured to detect voltages of a first node and a second node so as to determine whether to stop the PWM controller. The PWM controller is stopped if a first potential is lower than a threshold, and the first potential derives from the voltage of the first node by a level shift of a first voltage difference. The second comparator is configured to detect the voltage of the first node and then to compare the voltage with a power reference voltage so as to determine whether the PWM controller receives necessary power. The third comparator is configured to compare the voltage of the second node with an enable reference voltage so as to determine whether to disable the PWN controller.
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NCP1582, NCP1582A, NCP1583.
Chien Mao Chuan
Huang Hsiang Lin
Huang Kent
Kao Shun Hau
Advanced Analog Technology, Inc.
Hsu Winston
Sterrett Jeffrey L
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