POWER SUPPLY APPARATUS AND POWER SUPPLY ARRANGEMENT

摘要

The invention relates to a power supply apparatus (1) and also to a power supply arrangement. The power supply apparatus comprises an interface to the load (2). The power supply apparatus also comprises at least one controllable solid-state switch (3), for supplying power between the aforementioned load and the power supply apparatus. The power supply apparatus comprises a control (7), which is fitted to control the aforementioned at least one controllable solid-state switch (3) at the selected switching frequency. The switching frequency is selected such that the noise of the load corresponding to the selected switching frequency meets the selection criterion.