Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch cut-out
Patent
1995-01-25
1997-07-29
Pascal, Robert
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch cut-out
315224, 315219, 315291, 315307, 315209R, H05B 3702
Patent
active
056524790
ABSTRACT:
A circuit for supplying power to a fluorescent lamp. A control system comprises a buck regulator for supplying a buck current, an inverter circuit for receiving the buck current and for generating a lamp voltage, a circuit for sensing a current in a fluorescent lamp, a circuit for sensing a no lamp condition, and a controller for controlling the buck regulator and the inverter. The circuit for sensing a no lamp condition monitors a voltage level at the inverter transformer. The controller is coupled to the circuit for sensing a no lamp condition. If a no lamp condition is detected, the controller responds by shutting itself down. The controller can be reactivated by toggling an on/off signal to reset a latch.
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LoCascio James J.
Mader Urs Harald
Micro Linear Corporation
Pascal Robert
Philogene Haissa
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