Appliance for generating operational low voltage (LV) for electronic component modules, with voltage cyclically alternating compared at capacitor with two threshold values, derived from reference voltage

摘要

Generating appliance for direct voltage (DC) supply consists of bridge rectifier (3), resistor (4), semiconductor switch (5), capacitor (6) and two-point control. Input of semiconductor switch is coupled to resistor terminal. Second resistor terminal is fed with rectified mains voltage. Switch output is coupled to capacitor. Actual value input of two-point control is connected to junction of switch and capacitor. Output of two-point control is coupled to control input of switch. Independent claims are included for DC voltage supply of electronic modules.