Patent ID: 7750583
Filing Date: 2010-07-06
Classification: H05B,Y10S

Abstract:
1. An electronic ballast with a step-up converter (LH, SH, DH, CH), which has an input capacitance (C), for operation using a phase gating dimmer, which has an inductance acting in series with a supply, characterized in that the electronic ballast has a device (DS, CS) for storing a prognosis value of a supply voltage (UIN) of the electronic ballast, in which, during a system half-cycle of the supply, the prognosis value of the supply voltage (UIN) is stored after termination of the phase gating in order to set the input capacitance (C), prior to the end of the phase gating, at most to a voltage which corresponds to the value stored in the device (DS, CS), by a charging operation in a subsequent system half-cycle.