| 摘要 |
<p>A power supply circuit (10) and a motor vehicle headlamp with a power supply circuit (10) are proposed. The power supply circuit (10) has a voltage input (14) for a voltage for the vehicle's electrical system and one or more voltage outputs (16) for the connection of lamps (2). The voltage (VB) at the voltage input (14) is measured and compared with a predefined nominal voltage for the voltage outputs (16). A conversion pulse duty ratio is determined from this, and the voltage outputs (16) are intermittently connected, by means of a switching device (S), to the voltage input (14), so lamps (L) connected there each consume their nominal power.</p> |
