CIRCUIT OF FLYBACK SWITCHED MODE POWER SUPPLY AND LIGHTING DRIVER IN WHICH IT IS USED Russian patent published in 2017 - IPC H02M1/44 H02M3/335 H02M3/337 H05B37/02 H05B41/288 

FIELD: electricity.

SUBSTANCE: circuit of flyback switched mode power supply and lighting driver in which it is used comprise: a transformer with primary winding, secondary winding and auxiliary winding situated on one side with the primary winding; an output rectifier connected to the output circuit terminal of the flyback switched mode power supply from the secondary winding of the transformer; a switching transistor designed to control voltage on the primary winding; a controller designed to send PWM signal for excitation of the switching transistor gate; a delay fixation chain designed to fix the gate potential of the switching transistor at low potential, so that the switching transistor is actuated at a wave trough of drain potential damped oscillations. MOS-transistor can be actuated at a wave trough of drain potential damped oscillations, and the loss of the switching capacity of the MOS-transistor can be reduced by locating the delay fixation chain in the circuit of flyback switched mode power supply and adding auxiliary winding in the transformer.

EFFECT: reduced switching capacity losses of MOS-transistors.

18 cl, 3 dwg