LED driving power supply based on Flyback ripple suppression type non-electrolytic capacitor

Abstract

The invention discloses an LED driving power supply based on a Flyback ripple suppression type non-electrolytic capacitor, and belongs to the technical field of power generation, power transformationor power distribution. A drive circuit comprises a full-bridge rectification filter circuit, a PFC conversion circuit, a ripple suppression unit and a control unit. An isolated single-stage AC-DC converter, an PFC converter based on the Flyback circuit and a ripple suppression converter based on the full-bridge circuit are combined to form the LED drive circuit, the ripple power decoupling is achieved, an electrolytic capacitor is prevented from being used, and meanwhile, the number of energy cycles in the circuit is reduced. The problem that the output voltage is out of control due to the fact that the instantaneous input power is lower than the required output power in a short time is solved, the requirements of no electrolytic capacitor, high power factor and high conversion efficiencyare met, the service life of the LED driving power supply is prolonged, and the stability and efficiency of the LED driving power supply are improved.

Description

technical field [0001] The invention discloses an LED drive power supply based on a Flyback ripple suppression type non-electrolytic capacitor, relates to the design of an LED lighting drive power supply, and belongs to the technical field of power generation, power transformation or power distribution. Background technique [0002] Semiconductor light emitting diodes (Light Emitting Diodes, LEDs) have the advantages of high efficiency, long life, and environmental protection, and have been widely used in various lighting occasions. In the case of AC power supply, the LED drive power supply needs to correct the input power factor. Since the LED is used as the load, its resistance value is very small, and the small ripple voltage will lead to a large ripple current and stroboscopic occurrence. Usually, the capacitor value is used Larger electrolytic capacitors are used for buffering, and the service life of high-quality electrolytic capacitors is much lower than that of LED c...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to address the deficiencies of the above-mentioned background technology and provide a LED drive power supply based on Flyback ripple suppression type electrolytic capacitors. The circuit can simultaneously It meets the requirements of power factor correction and constant output current, has the advantages of no electrolytic capacitor, high power factor and high conversion efficiency, prolongs the service life of the LED drive power supply, improves the stability and efficiency of the LED drive power supply, and solves the problem based on the series structure The active power decoupling circuit has a technical problem that the instantaneous input power is lower than the expected output power in a short period of time, resulting in hidden dangers of capacitor voltage runaway

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