Patent ID: 6744220
Filing Date: 2004-06-01
Classification: H05B,Y02B,Y10S

Abstract:
A free-running circuit arrangement for operating a load (La), having at least one switching element (T1, T2), a freewheeling diode that is connected in an anti-parallel fashion relative to the main current direction of the at least one switching element (T1, T2), a load circuit (L3, C6, C5) and a control resonant circuit (L2, CE,T1, CE,T2) which comprises at least one control inductor (L2) and at least one self-capacitance (CE,T1, CE,T2) of the at least one switching element (T1, T2), characterized in that the at least one switching element (T1, T2) has a control electrode, a working electrode and a reference electrode, there acting between the control electrode and the working electrode a capacitance (CM,T1, CM,T2) that is coupled to the control resonant circuit (L2, CE,T1, CE,T2) in such a way that energy is fed into the control resonant circuit (L2, CE,T1, CE,T2) by the charging and discharging current (ICM,T1, ICM,T2) of this capacitance (CM,T1, CM,T2), the circuit arrangement having no components for feeding energy into the control resonant circuit by electromagnetic coupling.