Digital power controller for gas discharge devices and the like

Details Digital power controller for gas discharge devices and the like Digital power controller for gas discharge devices and the like

2004-09-13

2008-11-11

Chen, Shih-Chao (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000

Reexamination Certificate

active

07449844

ABSTRACT:
A programmable digital power controller for gas discharge devices such as fluorescent lamps or other devices using all digital internal and external programmable controls. A specific ASIC is described. A gate array and microcomputer share parallel functions with fast sub-functions carried out by the gate array and slower sub-functions carried out by a micro-processor. Circuits are provided for automatic shut down when a high frequency ground fault is detected; for connecting the filaments of multiple gas discharge devices in a series/parallel circuit in a manner that power for a particular device is disabled when that device is removed from the circuit; for driving the load as close to resonance as possible but in an inductive mode; and for developing a dead time between high side and low side switches which is related to transformer current, switch current, bridge voltage or bridge voltage dv/dt.

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