Flash strobe power supply system and method
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United States of America Patent
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Nov 16, 2004
Grant Date -
Apr 29, 2004
app pub date -
Oct 29, 2002
filing date -
Oct 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reliable strobe power supply is disclosed that provides requisite light energy for emergency uses without causing EMI problems. A two phase dual flyback power converter operating in transitional mode is disclosed containing a microcontroller that maintains a 180 degree displacement between the two phases by enabling a small, variable dead time between the cessation of stored energy in the flyback transformers and turn-on of the associated power switching transistor for one or the other phases. The power supply is capable of detecting a fault (neoning) and automatically correcting the condition by incrementing the flash capacitor charge off-time delay. The power supply is also capable of tolerating defective (persistently neoning) strobe tubes that cause an inordinate delay in capacitor charging by turning them off.
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