DC-DC converter with substantially constant on-time and...

Details DC-DC converter with substantially constant on-time and... DC-DC converter with substantially constant on-time and...

2011-01-25

2011-01-25

Sterrett, Jeffrey L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S286000, C323S288000

Reexamination Certificate

active

07876081

ABSTRACT:
A comparator-system DC-DC converter1according to an embodiment of the present invention comprises a control unit200which has a comparator section20, 40which compares the output voltage of the voltage conversion section with a reference voltage and determines a predetermined ON width of the ON pulse of the control signal Ssw or a predetermined OFF width of the OFF pulse of the control signal Ssw, and frequency control means25which compares the control signal Ssw with reference clock Cref and adjusts the ON width or OFF width so that the frequency of the control signal Ssw is constant. The frequency control means25detects a state where the output current of the voltage conversion section100is 0 A or a state where the output current is going to be 0 A and stops the processing to adjust the ON width or OFF width.

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