Protection circuit for electronic ballasts which use charge pump

Details Protection circuit for electronic ballasts which use charge pump Protection circuit for electronic ballasts which use charge pump

1993-12-09

1995-03-07

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315205, 315209R, 315225, 315DIG5, 315DIG7, H05B 4116

Patent

active

053961536

ABSTRACT:
A protection circuit for electronic ballasts which use charge pump power factor correction includes a switch with an overvoltage sensor, a resistor and a diode. In the event of a fault condition, the switch disables the charge pump power factor correction, while the resistor and diode prevent the switch dissipating unduly large amounts of energy.

REFERENCES:
patent: 4017785 (1977-04-01), Perper
patent: 4808887 (1989-02-01), Fuhnrich et al.
patent: 5010277 (1991-04-01), Courier de Mere
patent: 5099407 (1992-03-01), Thorne

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