High efficiency switching power supply

H - Electricity – 02 – M

Patent

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Details

H02M 11/00 (2006.01) H02J 7/34 (2006.01) H02J 9/00 (2006.01) H02M 1/00 (2007.01)

Patent

CA 2575831

A high efficiency switching power supply including an analog front end, a battery control circuitry portion, a display and equalization circuitry portion, field effect transistor (FET) drivers, an isolated power supply transformer circuitry (and three associated sets of tap circuitry), microcontroller circuitry, oscillator circuitry, overcharge protection circuitry, programmable logic circuitry portion, and a zero current predictor. Overbiasing of the FET power supply switches, and/or other various circuitry features disclosed herein, helps achieve electrical power efficiencies of preferably greater than 95%, even more preferably greater than 98% and even more preferably greater than 99%. Preferably, the switching power supply has one or more of the following: (1) high electrical power efficiency (>95%. >98%, >99%); (2) overbiasing of a gate of a power supply switch; (3) a power supply switch with a low gate capacitance ratio; (4) multiple modes of operation; and (5) current prediction wherein an inductor voltage is used to control a constant current capacitor whose voltage indicates the level of current in the inductor.

L~invention porte sur une alimentation de commutation haute efficacité comprenant une extrémité avant analogique, une portion de circuits de commande de batterie, un affichage et une portion de circuits d~égalisation, des pilotes de transformateur à effet de champ (FET), des circuits isolés de transformateur d~alimentation (et trois jeux associés de circuits de dérivation), des circuits de microcontrôleur, des circuits oscillateurs, des circuits de protection contre la surcharge, une portion de circuits à logique programmable et un circuit indicateur de courant nul. La surpolarisation des interrupteurs d~alimentation FET et/ou d~autres caractéristiques de circuits diverses divulguées ici, contribue à obtenir des efficacités d~alimentation électrique de préférence supérieures à 95%, mieux encore supérieures à 98% et idéalement supérieures à 99%. De préférence, l~alimentation de commutation possède un ou plusieurs des éléments suivants : (1) efficacité élevée d~alimentation électrique (>95%, >98%, >99%); (2) surpolarisation d~une porte d~interrupteur d~alimentation ; (3) un interrupteur d~alimentation d~un faible rapport de capacitance de porte ; (4) multiples modes d~exploitation ; et (5) un indicateur de courant utilisant une tension d~inducteur pour commander un condensateur à courant constant dont la tension indique le niveau de courant dans l~inducteur.

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