Abstract: A switch mode power supply for igniting and operating a high-pressure gas discharge lamp includes an ignition sub-circuit which is coupled via a transformer to the circuit. The ignition sub-circuit has at least an ignition capacitor, and a switching element for discharging the capacitor at a desired moment in time having a control electrode. The control electrode of the switching element is connected to the commutator of the lamp circuit via a control sub-circuit having substantially passive elements.

Abstract: The present invention relates to a switch mode power supply for igniting and operating a high-pressure gas discharge lamp (2), comprising an ignition sub-circuit (20) which is coupled via a transformer (14) to the circuit, wherein the ignition sub-circuit comprises: -at least an ignition capacitor (22); -a switching element (30) for discharging the capacitor at a desired moment in time having a control electrode; wherein the control electrode of the switching element is connected to the commutator (6, 7, 10, 16, 18) of the lamp circuit via a control sub-circuit (32, 34, 36, 38) which comprises substantially passive elements.

Abstract: A switching device intended for igniting and operating a high-pressure discharge lamp, provided with a switch-mode power supply (smps) for supplying a controlled current to the lamp, and with a pre-conditioner for feeding the smps. The pre-conditioner is provided with a storage capacitor. The switching device also includes an ignition circuit including a pulse capacitor and a switch for generating ignition-voltage pulses for igniting the lamp. The pulse capacitor, having a capacity of CF, is energized from the storage capacitor via an ohmic resistor.

Abstract: The invention relates to a switching device intended for igniting and operating a high-pressure discharge lamp, provided with a switch-mode power supply (smps) for supplying a controlled current to the lamp, and with a pre-conditioner for feeding the smps. Said pre-conditioner is provided with a storage capacitor. The switching device also comprises an ignition circuit including a pulse capacitor and a switch for generating ignition-voltage pulses for igniting the lamp. The pulse capacitor having a capacity of CF is energized from the storage capacitor via an ohmic resistor with a value of R Ohm. According to the invention, the product RC is at most 1031 2.