Multi-output electronic ballast

Abstract

The invention relates to a multi-output electronic ballast used for driving a plurality of groups of lamps. The multi-output electronic ballast comprises an alternating current-direct current converting circuit, a first inverter circuit, a second inverter circuit, a boost voltage generation circuit and a control circuit, wherein the alternating current-direct current converting circuit is used for converting an alternating current input voltage into a high direct current voltage; the first inverter circuit is used for selectively converting the high direct current voltage into a first alternating current output voltage; the second inverter circuit is used for converting the high direct current voltage into a second alternating current output voltage; the boost voltage generation circuit is used for generating a boost voltage; and the control circuit is used for selectively receiving electric energy from the boost voltage and generating and transmitting a control signal to a first inverter control circuit according to a turn-on state of a first external switch. When the control signal generated by the control circuit is transmitted to the first inverter control circuit, the first inverter control circuit starts running, and then the first inverter circuit converts the high direct circuit voltage into the first alternating circuit output voltage. The multi-output electronic ballast saves cost of electric elements, and has the advantages of small size, small occupied space and the like.

Description

technical field [0001] The invention relates to an electronic ballast, in particular to a multi-output electronic ballast which can selectively stop outputting part of the output voltage. Background technique [0002] Lighting is the basic need of human beings. In recent years, with the frequent global economic, trade and commercial activities, and the improvement of the quality of home life, lighting power consumption has also risen. The overall lighting power demand is very considerable. Currently, the most widely used lamp body is A low-pressure gas discharge lamp, also known as a fluorescent lamp or a fluorescent lamp. Therefore, if we can devote ourselves to the energy saving of this kind of low-pressure gas discharge lamp, we can save considerable electric energy. With the evolution of the times and the improvement of social living standards, ordinary lighting The drive circuit is no longer sufficient, low electromagnetic interference, high efficiency, high power facto...

AI Technical Summary

Problems solved by technology

[0007] Since the power circuits driving each group of lamp tubes are independent of each other, multi-output electronic ballasts contain multiple AC-DC conversion circuits, and the AC-DC conversion circuits contain multiple high-cost power components. The output electronic ballast not only takes up space due to its large size, but also costs a lot

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