| 摘要 |
A flash control circuit for use with a system controller is disclosed. The circuit includes a booster unit for receiving a first voltage signal and for outputting a second voltage signal to a lamp. The booster unit boosts the first voltage signal and then charges the boosted first voltage signal. Also included is a voltage sensor for sensing the voltage of the second voltage signal and for transmitting a voltage indication signal to the system controller. An oscillator outputs the first voltage signal according to an oscillation control signal from the system controller, and a triggering unit generates a trigger pulse according to a lighting control signal output from the system controller. The circuit further includes an accidental lighting prevention unit coupled to the triggering unit. The accidental lighting prevention unit disables the lighting control signal for a first period of time after a system power signal has been switched on and disables the lighting control signal for a second period of time before the system power signal has been switched to an OFF state.
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