CN216873431U

CN216873431U - A step-down rectification drive power supply circuit for LED lamp is efficient energy-conserving

Info

Publication number: CN216873431U
Application number: CN202220450854.XU
Authority: CN
Inventors: 刘凤
Original assignee: Shanghai Longyuan Electromechanical Technology Co ltd
Current assignee: Shanghai Longyuan Electromechanical Technology Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-07-01
Anticipated expiration: 2032-03-03

Abstract

The utility model provides a high-efficiency energy-saving voltage-reducing rectifying driving power supply circuit for an LED lamp, which comprises an alternating current input end L/N, a rectifying bridge BD1, a power supply chip U1, an inductor T1, an electrolytic capacitor EC1, a stroboscopic removing chip U2 and a direct current output end Vout-. Through having set up rectifier bridge BD1, power chip U1, inductance T1, electrolytic capacitor EC1, remove stroboscopic chip U2, can convert the 220V alternating current into LED lamp 65V-320V's adaptation voltage, no electric leakage has step-down, filtering, removes the stroboscopic function, and the electric energy loss is few to photoelectric conversion rate is high, has finally realized energy-efficient purpose. Compared with the LED lamp in the prior art, the LED lamp can reduce the electric energy consumption by over 35 to 60 percent under the same environmental condition and the same light and normal brightness.

Description

A step-down rectification drive power supply circuit for LED lamp is efficient energy-conserving

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of energy-saving LED lamps, in particular to a high-efficiency energy-saving voltage-reducing rectification driving power circuit for an LED lamp.

[ background of the utility model ]

With the change of times, the electric lighting lamp completely replaces the traditional brightness lamp and kerosene lamp, and in the electric lighting illumination, the resistance filament lamp and ballast gas lamp are changed into the LED lamp which is more energy-saving and brighter, but no matter whether any lighting lamp is mostly resistive and sensitive negative, the power factor is between 0.45 and 0.65, namely only 45 percent and 55 percent of photoelectric conversion rate are achieved, and 35 percent and 55 percent of electric energy are lost in heat energy. Although modern LED lamps are replaced by other high-energy-consumption lamp decorations, the fatal inherent electric energy heat loss of the modern LED lamps is not completely solved all the time, and the vision of people is only brighter than that of the prior lamps.

The LED lamp is actually a semiconductor light-emitting diode (commonly known as a lamp bead) as a light source, and can emit dazzling light in very low direct current voltage and very low current, but the direct current low voltage light-emitting diode lamp bead needs a step-down rectification driving power supply to be matched with an alternating current 220V power grid for use, but the driving power supply is low in price on the market at present, a very simplified resistance-capacitance RC circuit is mostly adopted, the RC driving power supply has the characteristics of few elements, low manufacturing cost, but the biggest defect of internal consumption is large, heat value electric leakage is high, safety coefficient is poor, and service life is short. Besides, due to the low price of the brand, the lamp beads of other brands are large in wattage, have the phenomenon of electric leakage (micro short circuit) and low in photoelectric conversion rate.

It should be noted that, all LED lamps are lighting devices with electronic components combined, and during the step-down rectification process, if isolation filtering measures are not taken, a large amount of higher harmonics will be generated to pollute the power supply, and the higher harmonics will also consume electric energy through the oscillation circuit.

The current LED lamp is supplied with power by 220V alternating current, the adaptive voltage range is designed to be between 186V and 256V, the adaptive voltage range is narrow, the phenomenon of poor flicker can occur when the voltage of a power grid is lower than 186V, the heating loss electric energy begins to increase when the voltage is higher than 235V, the aging of the lamp is accelerated, and the service life is greatly reduced.

[ Utility model ] content

In order to solve the problems pointed out in the background art, the utility model provides a high-efficiency energy-saving step-down rectification driving power supply circuit for an LED lamp.

The utility model provides a step-down rectification drive power supply circuit for LED lamp is energy-efficient, it includes power chip U1, power chip U1's VCC end is connected with rectifier bridge BD 1's output, rectifier bridge BD 1's input is connected with alternating current input end L/N, power chip U1's D end is connected with the input that goes stroboscopic chip U2 through inductance T1, the output that goes stroboscopic chip U2 is connected with direct current output Vout-.

According to an embodiment of the present invention, the ac input terminal L/N is connected to the rectifier bridge BD1 through a fuse, the rectifier bridge BD1 includes two ac input terminals and two dc output terminals, an adjustable resistor RV1 is connected between the two ac input terminals, a capacitor C2 is connected between the two dc output terminals, one dc output terminal is grounded, and the other dc output terminal is used as a pulsating dc terminal V +.

According to an embodiment of the present invention, the power chip U1 includes a VCC terminal, an ROVP terminal, an NC terminal, a GND terminal, two D terminals, and two CS terminals, the VCC terminal is connected to the pulsating dc terminal V +, a resistor R4 is connected between the ROVP terminal and the GND terminal, the GND terminal is grounded, the two CS terminals are connected and grounded through a resistor RS1 and a resistor RS2, a resistor RS1 and a resistor RS2 are connected in parallel, and the two D terminals are connected and connected to the pulsating dc terminal V + through a diode D1.

According to one embodiment of the present invention, the stroboscopic removal chip U2 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8, a resistor R9 and a resistor R10 are connected between the pin 4 and the pin 6 of the stroboscopic-removing chip U2, the resistor R9 and the resistor R10 are connected in parallel, the inductor T1 is connected between the pin 6 of the stroboscopic-removing chip U2 and the D end of the power supply chip U1, the negative end of an electrolytic capacitor EC1 is connected between the inductor T1 and the pin 6 of the stroboscopic-removing chip U2, the positive end of the electrolytic capacitor EC1 is connected with the pulsating direct current end V +, a resistor R7 is connected between the pin 6 of the stroboscopic-removing chip U2 and the pulsating direct current end V +, and a reference resistor RS is connected between a pin 5 and a pin 8 of the stroboscopic removing chip U2, and the pin 8 of the stroboscopic removing chip U2 is connected with the direct current output end Vout-.

In conclusion, the beneficial effects of the utility model are as follows:

1. through having set up rectifier bridge BD1, power chip U1, inductance T1, electrolytic capacitor EC1, remove stroboscopic chip U2, can convert the 220V alternating current into LED lamp 65V-320V's adaptation voltage, no electric leakage has step-down, filtering, removes the stroboscopic function, and the electric energy loss is few to photoelectric conversion rate is high, has finally realized energy-efficient purpose.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.

[ detailed description ] embodiments

Please refer to fig. 1. It should be understood that the structures, ratios, sizes, etc. shown in the drawings and attached to the description are only for understanding and reading the disclosure of the present invention, and are not intended to limit the practical conditions of the present invention, so that the present invention has no technical significance, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the technical contents of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

First, the design of the present invention is described as follows: the LED lamp in the prior art has the problems of large electric energy loss, low photoelectric conversion rate and the like, and in order to solve the problems, the utility model provides a specific implementation mode of a high-efficiency energy-saving step-down rectification driving power circuit for the LED lamp.

A voltage-reducing rectification driving power circuit for efficient and energy-saving LED lamps is shown in figure 1 and comprises an alternating current input end L/N, a rectifier bridge BD1, a power chip U1, an inductor T1, an electrolytic capacitor EC1, a stroboscopic-removing chip U2 and a direct current output end Vout-. The input end of the rectifier bridge BD1 is connected with an alternating current input end L/N; the output end of the rectifier bridge BD1 is connected with the input end of a power supply chip U1, the output end (D end) of the power supply chip U1 is connected with the input end of a stroboscopic removing chip U2 through an inductor T1 and an electrolytic capacitor EC1, and the output end of the stroboscopic removing chip U2 is connected with a direct current output end Vout-.

Alternating current input end L/N is connected with rectifier bridge BD1 through the protective tube, and rectifier bridge BD1 includes two alternating current input ends and two direct current output ends, and two alternating current input ends are connected with alternating current input end L/N respectively, are connected with adjustable resistance RV1 between two alternating current input ends, are connected with electric capacity C2 between two direct current output ends, and a direct current output end ground connection, another direct current output end is as pulsation direct current electric end V +.

The power chip U1 includes VCC terminal, ROVP terminal, NC terminal, GND terminal, two D terminals, and two CS terminals. The VCC end of the power supply chip U1 is connected with the output end (one direct current output end) of the rectifier bridge BD 1; the VCC end of the power supply chip U1 is connected with the pulsating direct current end V +; a resistor R4 is connected between the ROVP end and the GND end of the power supply chip U1, and the GND end is grounded; two CS ends of the power chip U1 are connected and grounded through a resistor RS1 and a resistor RS2, and a resistor RS1 and a resistor RS2 are connected in parallel; two D ends of the power chip U1 are connected and connected with the pulsating direct current end V + through a diode D1.

The stroboscopic-free chip U2 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, and pin 8. A resistor R9 and a resistor R10 are connected between a pin 4 and a pin 6 of the stroboscopic-removing chip U2, and a resistor R9 and a resistor R10 are connected in parallel; an inductor T1 is connected between a pin 6 of the stroboscopic removal chip U2 and the D end of the power supply chip U1, a negative end of an electrolytic capacitor EC1 is connected between the inductor T1 and the pin 6 of the stroboscopic removal chip U2, and a positive end of the electrolytic capacitor EC1 is connected with a pulsating direct current end V +; a resistor R7 is connected between a pin 6 of the stroboscopic-removing chip U2 and a pulsating direct current end V +; and a reference resistor RS is connected between the pin 5 and the pin 8 of the stroboscopic removal chip U2, and the pin 8 of the stroboscopic removal chip U2 is connected with the direct current output end Vout-.

The working process of the present invention will be further described below:

alternating current comes in from an alternating current input end L/N, is rectified by a rectifier bridge BD1 and then is converted into pulsating direct current v +, the pulsating direct current v + is reduced by a voltage reduction constant current through an inductor T1 and a power supply chip U1 and is converted into voltage current suitable for the LED lamp to work, and finally, the voltage current is converted into low-ripple direct current through the combined action of filtering of an electrolytic capacitor EC1 and a stroboscopic removal chip U2.

In summary, in the embodiment, by the arrangement of the rectifier bridge BD1, the power chip U1, the inductor T1, the electrolytic capacitor EC1 and the stroboscopic removal chip U2, 220V alternating current can be converted into adaptive voltage of 65V-320V of the LED lamp, no electric leakage exists, the functions of voltage reduction, filtering and stroboscopic removal are achieved, electric energy loss is low, and therefore the photoelectric conversion rate is high, and the purpose of high efficiency and energy saving is finally achieved. Compared with the LED lamp in the prior art, the LED lamp can reduce the electric energy consumption by over 35 to 60 percent under the same environmental condition and the same light and normal brightness.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A voltage reduction rectification driving power supply circuit for efficient and energy-saving LED lamps is characterized by comprising a power supply chip U1, wherein a VCC end of the power supply chip U1 is connected with an output end of a rectifier bridge BD1, and an input end of the rectifier bridge BD1 is connected with an alternating current input end L/N;

the D end of the power supply chip U1 is connected with the input end of a stroboscopic removing chip U2 through an inductor T1, and the output end of the stroboscopic removing chip U2 is connected with a direct current output end Vout-.

2. The efficient and energy-saving buck rectifying power supply circuit for the LED lamp as claimed in claim 1, wherein the AC input terminal L/N is connected to the rectifier bridge BD1 through a fuse, the rectifier bridge BD1 includes two AC input terminals and two DC output terminals, an adjustable resistor RV1 is connected between the two AC input terminals, a capacitor C2 is connected between the two DC output terminals, one DC output terminal is connected to ground, and the other DC output terminal is used as a pulsating DC terminal V +.

3. The buck rectifying driving power supply circuit for efficient energy saving of an LED lamp according to claim 2, wherein the power chip U1 includes a VCC terminal, a ROVP terminal, an NC terminal, a GND terminal, two D terminals, and two CS terminals;

the VCC end is connected with the pulsating direct current end V +;

a resistor R4 is connected between the ROVP end and the GND end, and the GND end is grounded;

the two CS ends are connected and grounded through a resistor RS1 and a resistor RS2, and a resistor RS1 and a resistor RS2 are connected in parallel;

the two terminals D are connected to each other and connected to the pulsating dc terminal V + through a diode D1.

4. The buck rectification power supply circuit for efficient energy saving of the LED lamp according to claim 3, wherein the stroboscopic removal chip U2 comprises pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8;

a resistor R9 and a resistor R10 are connected between a pin 4 and a pin 6 of the stroboscopic-removing chip U2, and the resistor R9 and the resistor R10 are connected in parallel;

the inductor T1 is connected between the pin 6 of the stroboscopic removal chip U2 and the D end of the power supply chip U1, the negative end of an electrolytic capacitor EC1 is connected between the inductor T1 and the pin 6 of the stroboscopic removal chip U2, and the positive end of the electrolytic capacitor EC1 is connected with the pulsating direct current end V +;

a resistor R7 is connected between a pin 6 of the stroboscopic-removing chip U2 and the pulsating direct current end V +;

and a reference resistor RS is connected between a pin 5 and a pin 8 of the stroboscopic removing chip U2, and the pin 8 of the stroboscopic removing chip U2 is connected with the direct current output end Vout-.