Opto-isolator multi-voltage detection circuit

G - Physics – 01 – R

Patent

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Details

G01R 19/155 (2006.01) G01R 19/165 (2006.01) G01R 19/20 (2006.01)

Patent

CA 2724875

An opto-isolator multi-voltage detection circuit is capable to handle a wide range of input voltages ranging from about 9 volts DC to about 240 volts AC includes an input voltage, an opto- isolator, a rectifier, a voltage divider, first and second transistors, and a DC to DC converter. The voltage divider operatively coupled to the first and second transistors is capable of evenly dividing the input voltage across the first and second transistors. The DC to DC converter operatively coupled to the transistors, the voltage divider, and the opto- isolator is capable of maintaining an output current from the rectifier. The use of the DC to DC converter, the voltage divider, and the transistors provide benefit of reducing a power dissipated throughout the entire circuit.

L'invention porte sur un circuit de détection de multiples tensions à opto-isolateur qui est capable de gérer une large gamme de tensions d'entrée se situant dans la plage d'environ 9 volts en courant continu à environ 240 volts en courant alternatif, ledit circuit comprenant une tension d'entrée, un opto-isolateur, un redresseur, un diviseur de tension, des premier et second transistors et un convertisseur CC à CC. Le diviseur de tension couplé de façon fonctionnelle aux premier et second transistors est capable de diviser de façon uniforme la tension d'entrée à travers les premier et second transistors. Le convertisseur CC à CC couplé de façon fonctionnelle aux transistors, au diviseur de tension et à l'opto-isolateur est capable de maintenir un courant de sortie provenant du redresseur. L'utilisation du convertisseur CC à CC, du diviseur de tension et des transistors fournit un avantage de réduction de puissance dissipée dans l'intégralité du circuit.

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