Patent ID: 9674908
Date: 2017-06-06
CPC Classifications: H02M,H05B

Claim:
1. A secondary-side bucking and current-stabilizing flyback power converter, adopting a dual-stage isolated circuit architecture, and provided for driving a low-power LED module to achieve the effect of a non-strobe output and improve the illumination effect of the LED module, comprising: an input module, electrically coupled to an external power supply, and provided for outputting an input current; a conversion module, adopting a flyback circuit architecture, and including a primary coil, a regulation coil, a regulator, an iron core and a secondary coil, and the primary coil and the regulation coil being installed at a primary side of the iron core, and the secondary coil being installed at a secondary side of the iron core, and the regulator being electrically coupled to the primary coil and the regulation coil, and the primary coil being electrically coupled to the input module, and the secondary coil forming an output voltage through the magnetic induction of the iron core after receiving the input current, while the regulation coil forming a regulation signal through the magnetic induction of the iron core and the regulation signal being provided for the regulator to regulate the duty cycle of the primary coil; and an output module, adopting a buck circuit architecture, and comprising a current stabilizer, and the output module being electrically coupled to the secondary coil and the LED module, and the output voltage being used to convert and form an output current to be outputted to the LED module, and the current stabilizer regulating the duty cycle of the output voltage after sensing the load effect of the output current on the LED module to keep the total output of the output current constant and reduce the ripple amplitude of the output current.