Electronic ballast for operating a lamp with iterative voltage pulses

摘要

The lamp (L) is driven by repeated high-voltage pulses. An electronic control circuit (1) has three outputs (S1,S2,S K), connected to the gates of four transistors (T1-T4). The first two transistors are connected to the first and second outputs of the control circuit, and are connected between earth and the primary (W1) of the transistor. The midpoint (M) of the primary winding is connected to the power supply (U B). The second two transistors are connected to the third output of the control circuit and are connected across the secondary of the transformer. The lamp is driven by the third winding (W3) of the transformer.