Ballast with fast-responding lamp-out detection circuit

Details Ballast with fast-responding lamp-out detection circuit Ballast with fast-responding lamp-out detection circuit

H - Electricity

05

B

H05B 41/26 (2006.01) H05B 41/285 (2006.01) H05B 41/295 (2006.01)

Patent

CA 2388280

A ballast (10) for powering a gas discharge lamp includes a lamp-out detection circuit (300) that quickly responds to a lamp-out condition. Lamp- out detection circuit (300) receives a portion of the lamp current and provides a detection voltage. The detection voltage remains at a first average level while the lamp is conducting current in a normal manner, but quickly decreases below a second level if the lamp ceases to conduct current. In a preferred embodiment, ballast (10) includes an inverter (100) and a resonant circuit (210,220) that are normally operated at a high frequency. The detection voltage is coupled to an enable input (112) of an inverter drive circuit (110), and the inverter (100) is either shut off or operated in a low-power mode within less than ten high frequency cycles after occurrence of a lamp-out condition.

Affiliated with

Also associated with

Rating

Ballast with fast-responding lamp-out detection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ballast with fast-responding lamp-out detection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ballast with fast-responding lamp-out detection circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1830965