Discrete bootstrap current amplification type energy-saving power supply for luminescent LED

Abstract

The invention discloses a discrete bootstrap current amplification type energy-saving power supply for a luminescent LED. The energy-saving power supply is characterized by mainly consisting of a control chip U2, a discrete bootstrap current amplification circuit, a current detection circuit, a diode rectifier U1, a polar capacitor C1, a diode D3, a field-effect tube trigger circuit, a constant current starting circuit and a variable frequency driving circuit, wherein an N pole of the diode D3 is connected with a VFB pin of the control chip U2, and a P pole of the diode D3 is connected with a VCC pin of the control chip U2 after passing through a resistor R5 and a resistor R6 in sequence; the field-effect tube trigger circuit is connected with an OUT pin and a VREF pin of the control chip U2 respectively; the constant current starting circuit is serially connected between the VCC pin of the control chip U2 and the field-effect tube trigger circuit; and the variable frequency driving circuit is connected with the constant current starting current. The energy-saving power supply has relatively high voltage endurance capability and load capacity, stable current can be output, and the brightness stability of the luminescent LED is effectively guaranteed. The energy consumption of the energy-saving power supply is decreased by more than 55% compared with the energy consumption of an existing power supply circuit.

Description

technical field [0001] The invention relates to the field of electronic energy saving, in particular to an energy-saving power supply for a discrete bootstrap current amplification type cold light LED. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since LED lamps are different from traditional incandescent lamps, they need to be driven by a dedicated power supply circuit. However, the current power supply circuit used in LED lamps is not only vulnerable to external voltage fluctuations, but also has poor load capacity, high energy consumption, and cannot control the output current, which leads to unstable brightness of LED lamps, power consumption, and use. Short life. [0003] Therefore, it is urgent to provide an LED power supply circuit that can not only increase the load capacity, bu...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor load capacity, high energy consumption and inability to control the output current in the LED voltage circuit in the prior art, and provide a discrete bootstrap current amplified energy-saving power supply for cold light LEDs

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