Simple protection circuit and adaptive frequency sweeping...

Details Simple protection circuit and adaptive frequency sweeping... Simple protection circuit and adaptive frequency sweeping...

2008-07-01

2011-11-22

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S308000

Reexamination Certificate

active

08063570

ABSTRACT:
A CCFL inverter circuit integrates a feedback circuit and protection circuit together. For both in-phase and out-of-phase applications, sensed lamp voltages can be used for open lamp and short lamp detection and sensed currents can be used for open lamp detection. The driving circuit adjusts the open lamp frequency by using a duty cycle control signal so that the driving circuit can always achieve the desired lamp voltage gain.

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