SECONDARY POWER SUPPLY Russian patent published in 2024 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in secondary power supply devices of radio engineering, automation and computer equipment. Secondary power supply source comprising a single-cycle DC voltage converter, including an output transformer, a filter capacitor, rectifying diode and power transistor, PWM control controller, comprising a generator, a reference element, a first resistor and a PWM comparator, first output of comparator is connected to first terminals of second resistor and first capacitor shunted by output terminals of generator, second terminals of the second resistor and the first capacitor are connected to the second input terminal and to the first input terminal, respectively, second output of the PWM comparator is connected through the first resistor to the output of the reference element and to the collector of the control transistor, emitter of which is connected to first input terminal and to end of secondary winding of feedback transformer, and the base, shunted by the second capacitor and the third resistor, is connected through the fourth resistor to the cathode of the feedback diode, which anode is connected to the beginning of the secondary winding of the feedback transformer, base of the switching transistor is connected to the first terminal of the fifth resistor, feedback amplifier inputs are connected to the first and second output terminals, the feedback amplifier output is connected to the commutating transistor collector, emitter of which is connected to the beginning of the primary winding of the feedback transformer, the end of which is connected to the first output terminal, wherein the second output of the fifth resistor is connected to the beginning of the secondary winding of the output transformer.

EFFECT: high reliability and high speed of response to change in input voltage and load current of the power supply.

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