Current-mode resonant inverter circuit for discharge lamp

Details Current-mode resonant inverter circuit for discharge lamp Current-mode resonant inverter circuit for discharge lamp

2006-01-11

2009-06-02

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S210000, C315S2090SC, C315S244000, C363S022000

Reexamination Certificate

active

07541749

ABSTRACT:
A highly stable current-mode resonant inverter circuit operates by detecting resonance current in the secondary side circuit. The inverter circuit comprises a step-up transformer with a secondary winding connected to a secondary side circuit with a capacitive component. The leakage inductance and the secondary winding and the capacitive component compose a series resonant circuit. The inverter circuit is configured to detect a current flowing through the secondary winding or capacitive component in the secondary side circuit, and determine a switching timing in response to the detected current. The determined switching timing allows the inverter circuit to oscillate self-excitedly at a resonance frequency of the series resonant circuit.

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