Control circuit and method for maintaining high efficiency over

Details Control circuit and method for maintaining high efficiency over Control circuit and method for maintaining high efficiency over

1993-03-23

1996-01-02

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323224, G05F 1618

Patent

active

054811783

ABSTRACT:
A circuit and method for controlling a switching voltage regulator having (1) a switch including one or more switching transistors and (2) an output adapted to supply current at a regulated voltage to a load including an output capacitor. The circuit and method generates a control signal to turn said one or more switching transistors OFF under operating conditions when the voltage at the output is capable of being maintained substantially at the regulated voltage by the charge on the output capacitor. Such a circuit and method increases the efficiency of the regulator circuit particularly at low average current levels.

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patent: 4706177 (1987-11-01), Josephson
patent: 5097196 (1992-06-01), Schoneman
patent: 5177676 (1993-01-01), Inam et al.
patent: 5184729 (1993-02-01), Fung et al.
"LT1432 5 V High Efficiency Step-Down Switching Regulator Controller," Data Sheet published by Linear Technology Corporation in the 1992 Linear Databook Supplement, Milpitas, Calif. , pp. 4-145 to 4-171.
"Max 782/Max 786 Notebook Computer Power Supplies," Advance Information Data Sheet published by Maxim Integrated Products, Feb. 1993, Sunnyvale, Calif., pp. 1-8.
"ML4873 Battery Power Control IC," Advance Information Data Sheet published by Micro Linear Corporation, dated Mar. 15, 1993, San Jose, Calif., pp. 1-8.

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