SINGLE-STROKE DC VOLTAGE CONVERTER Russian patent published in 2021 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used in devices for secondary power supply of radio engineering systems, automation and computer technology. A single-cycle DC converter contains a transformer, the secondary winding of which is connected via a diode rectifier to the output terminals of the device, shunted by an output filter capacitor. The beginning of the primary winding of the transformer is connected to the first input pin, and the end is connected to the drain of the switching transistor, the gate of which is connected via the first resistor to the output terminal of the first CMOS integrated circuit of the logic inverter (CMOS IS LI), and the source is connected to the common input terminal, combined with the negative power output of all CMOS IS LI, with the first terminals of the output filter capacitor, the Zener diode and the timing capacitor, as well as with the beginning of the transformer feedback winding. The end of the feedback winding of the transformer is connected through the first diode to the second terminal of the output filter capacitor and through the second resistor with the input terminal of the second CMOS IS LI, the output terminal of which is connected to the first input terminal of the logic circuit AND-NOT and through the reverse-connected second diode with the connection point of the input output of the third CMOS IS LI, the first output of the third resistor and the first output of the serial RC circuit. The second pin of the serial RC circuit is connected to the connection point of the output pin of the logic circuit AND-NOT and the input pin of the first CMOS IS LI, the output pin of which is connected to the first pins of the fourth and fifth resistors through the third diode switched back on. The second terminals of the fourth and fifth resistors are connected, respectively, to the first input terminal and the second terminal of the timing capacitor, to which the second terminal of the third resistor is connected. The converter contains a feedback control transistor, the collector of which is connected to the input of the third CMOS IS LI, the control junction is connected via a galvanic isolation node to the output terminals of the device, and the base is connected to the second terminal of the Zener diode, combined with the plus power output of all CMOS IS LI. In addition, the converter contains the sixth and seventh resistors, as well as a triggering transistor, the collector of which is connected to the positive power terminal of all CMOS IS LI, the emitter is connected via the sixth resistor to the first input terminal of the device, and the base is connected to the second terminal of the filter capacitor.

EFFECT: increase in the efficiency of the device by reducing the power consumption of the converter control circuit while maintaining the potential start-up process from the input voltage.

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