Hysteretic power-supply controller with adjustable switching...

Details Hysteretic power-supply controller with adjustable switching... Hysteretic power-supply controller with adjustable switching...

2011-05-17

2011-05-17

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S222000, C323S271000

Reexamination Certificate

active

07944192

ABSTRACT:
An embodiment of a hysteretic power-supply controller includes a signal generator, frequency adjuster, and signal combiner. The signal generator is operable to generate a switching signal having a first level in response to a control signal being greater than a first reference value and having a second level in response to the control signal being less than a second reference value, the switching signal having an actual frequency and being operable to drive a switching stage that generates a regulated output signal. The frequency adjuster is operable to generate a frequency-adjust signal that is related to a difference between the actual frequency and a desired frequency. And the signal combiner is operable to generate the control signal from the frequency-adjust signal and the regulated output signal. Such a hysteretic power-supply controller may allow one to set the switching frequency to a desired value independently of the parameters of the power supply.

REFERENCES:
patent: 6388429 (2002-05-01), Mao
patent: 6828766 (2004-12-01), Corva et al.
patent: 7292014 (2007-11-01), Lee et al.
patent: 2004/0232895 (2004-11-01), Chiu et al.
patent: 2005/0128005 (2005-06-01), Li et al.
patent: 2007/0080671 (2007-04-01), Qahouq et al.

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