Power supply device for supplying power to electronic card for e.g. household appliance, has electronic switches controllable by electronic card depending on requested power consumption, and capacitor supplying energy to switches

摘要

The device has electronic switches (Q1, Q3) controllable by a load (C) i.e. electronic card, depending on requested power consumption. A reserve capacitor (C-1) supplies energy to two controllable switches, where one of the electronic switches is selected from a group consisting of a high voltage MOS transistor, a transistor, a thyristor and a bipolar transistor. A voltage regulation block (A-1) regulates the voltage to be supplied to the load under variable power consumption, and a Zener diode (D4) limits drive voltage of one of the controllable electronic switches.