PROTECTION CIRCUIT FROM VOLTAGE SWELL AND POWER SAVING FOR SWITCHED POWER SUPPLY

摘要

FIELD: electricity.;SUBSTANCE: provided switched power supply (1), connected with AC voltage source and containing a transformer, having a primary winding and a secondary winding. The mentioned switched power supply(1) additionally contains a power rectifier, the input capacitor and SMPS controller. According to the present invention, the low-voltage locking device provides, that if the measured bus voltage is less than a certain level, than the comparator with the reference voltage, determined by the energy-gap width, which is connected in series to the mentioned low-voltage locking device must be powered.;EFFECT: reliability increase.;5 cl, 3 dwg