Abstract: A kind of fluorescent lamp driver power consists of a multi-switch converting circuit, a power transformer, a resonant inductor, a resonant capacitor, a step-up transformer and a rectifier. The primary winding of the power transformer connects with an AC output of multi-switch converting circuit. The resonant inductor and the resonant capacitor are connect to the secondary winding of the power transformer through the primary winding of the step-up transformer. The secondary winding of the power transformer connects with the rectifier. The secondary winding of the step-up transformer connects with the load output. This invention combines the fluorescent lamp driver power and the power supply of the control system, so that energy transformation occurs only once for the output from the Power Factor Correction Circuit to lamp.

Abstract: A kind of fluorescent lamp driver power consists of the multi-switch converting circuit, power transformer, resonant inductor, resonant capacitor, step-up transformer and rectifier. The primary winding (PW) of the power transformer connects with the AC output of multi-switch converting circuit. The resonant inductor and resonant capacitor, after series connection, connect to the secondary winding (SW) of the power transformer through the PW of the step-up transformer. The SW of the power transformer connects with the rectifier. The SW of the step-up transformer connects with the load output. This invention combines the fluorescent lamp driver power and the power supply of the control system, so that the energy transformation occurs only once for the output from the Power Factor Correction (PFC) Circuit to lamp. By using this invention, the system cost is lowered greatly by saving two converters, working efficiency remarkably enhanced and system stability improved as well.

Abstract: The present invention discloses a kind of fluorescent lamp driver, which consists of the multi-switch converting circuit, power transformer (T1), resonant inductor (L1), resonant capacitor (C3) and step-up transformer (T2). It features the followings: The primary winding (PW) of T1 connects with the AC output of multi-switch converting circuit. L1 and C3, after series connection, connect with the secondary winding (SW) of T1 through the PW of T2. The SW of T2 connects with the load output. In this invention, a resonant inductor is connected in series on the resonant loop to realize frequency and voltage modulation as well as the soft switch function of the primary power switch of the power transformer.