CN217116466U - Ripple-removing LED driving power supply and LED lamp - Google Patents
Ripple-removing LED driving power supply and LED lamp Download PDFInfo
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- CN217116466U CN217116466U CN202220707883.XU CN202220707883U CN217116466U CN 217116466 U CN217116466 U CN 217116466U CN 202220707883 U CN202220707883 U CN 202220707883U CN 217116466 U CN217116466 U CN 217116466U
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Abstract
The utility model relates to an electronic circuit technical field discloses a remove ripple LED drive power supply and LED lamp. The ripple-free LED driving power supply comprises a positive power supply node, a negative power supply node, an input rectification circuit, a dimming control circuit and a ripple elimination circuit, wherein the positive power supply node is used for being connected with the positive pole of an external LED load, the negative power supply node is used for being connected with the negative pole of the external LED load, the output end of the input rectification circuit is connected with the positive power supply node, the dimming control circuit is connected with the output end of the input rectification circuit, the ripple elimination circuit is respectively connected with the dimming control circuit and the negative power supply node, and when the input end of the input rectification circuit is connected with alternating voltage, the input rectification circuit, the LED load, the ripple elimination circuit and the dimming control circuit form a direct current path. This remove ripple LED drive power supply eliminates some ripples that DC power supply output direct current voltage is pressed through configuration ripple cancelling circuit, improves illuminating effect.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit technique and specifically relates to a remove ripple LED drive power supply and LED lamp.
Background
With the increasing severity of energy crisis and environmental pollution, energy conservation and emission reduction become one of the focus problems of social attention. The LED lamp gradually replaces incandescent lamps, high-voltage sodium lamps and fluorescent lamps to become a fourth-generation green light source due to the advantages of long service life, low power consumption, easiness in dimming, environmental friendliness and the like. Different from the power supply of the traditional lamp, the LED has nonlinear optical-electrical-thermal characteristics, so that the high-quality ripple-free LED driving power supply is a key factor for popularizing LED illumination.
Because the LED lamps must be driven by a dc power supply, each LED lamp is provided with a driving power supply capable of outputting dc power to convert ac power (usually, commercial power) into dc power to supply power to the LED, so as to make the LED emit light.
The power frequency ripple flicker of the LED lamp means that the output voltage of the existing ripple-free LED driving power supply is direct current with ripple, so that the output light source of the LED lamp generally has a low frequency flicker 2 times as high as the input alternating voltage frequency, for example, the power frequency ripple flicker of the LED light source is 100Hz under the alternating current of 50 Hz. Although ripple flicker of light is not easily perceived by naked eyes in general situations, a phenomenon of light flicker stripes occurs under devices such as mobile phones and cameras, and the light flicker caused by the ripple current can damage the eyesight of human eyes.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a remove ripple LED drive power supply and LED lamp to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
In a first aspect, a ripple-free LED driving power supply is provided, including:
the positive electrode power supply node is used for being connected with the positive electrode of an external LED load;
the negative power supply node is used for being connected with the negative electrode of an external LED load;
the input end of the input rectifying circuit is used for accessing alternating current commercial power, and the output end of the input rectifying circuit is connected with the positive power supply node;
the dimming control circuit is connected with the output end of the input rectifying circuit and takes electricity from the output end of the input rectifying circuit;
the ripple eliminating circuit is respectively connected with the dimming control circuit and the negative electrode power supply node, when the input end of the input rectifying circuit is connected with alternating voltage, the input rectifying circuit, the LED load, the ripple eliminating circuit and the dimming control circuit form a direct current path, and the ripple eliminating circuit is used for eliminating current ripples of the LED load.
As an improvement of the scheme, the input rectifying circuit comprises a fuse and a rectifying bridge;
one end of the fuse is used for connecting a live wire, the other end of the fuse is connected with a first input end of the rectifier bridge, a second input end of the rectifier bridge is used for connecting a zero line, a first output end of the rectifier bridge is connected with a positive power supply node, and a second output end of the rectifier bridge is grounded.
As an improvement of the scheme, the dimming control circuit is a linear dimming control circuit.
As an improvement of the above scheme, the dimming control circuit comprises a dimming control module, a first resistor, a second resistor, a third resistor, a fourth resistor, a first electrolytic capacitor and a first diode;
the dimming control module is provided with a power supply input end, a current sampling end, a voltage feedback end, a linear drain end and a chip ground end, the power supply input end of the dimming control module is connected with the output end of the input rectification circuit through a first resistor, the current sampling end of the dimming control module is grounded through a second resistor, the voltage feedback end of the dimming control module is connected with the linear drain end of the dimming control module through a third resistor, the linear drain end of the dimming control module is connected with a ripple eliminating circuit, one end of a fourth resistor and the anode of a first electrolytic capacitor are connected with the cathode of a first diode, the other end of the fourth resistor and the cathode of the first electrolytic capacitor are connected with the linear drain end of the dimming control module, and the chip ground end of the dimming control module is grounded.
As an improvement of the scheme, the dimming control module adopts a BP5178FH series chip.
As an improvement of the above scheme, the ripple cancellation circuit includes a ripple cancellation module;
the ripple elimination module is configured with power supply input end, chip ground and linear drain terminal, the power supply input end and the anodal power supply node of ripple elimination module are connected, the linear drain terminal and the negative pole power supply node of ripple elimination module are connected, the chip ground of ripple elimination module is connected with dimming control circuit.
As an improvement of the scheme, the BP5659B series chips are selected as the ripple elimination module.
In a second aspect, an LED lamp is provided, comprising the ripple-free LED driving power supply of the first aspect.
The utility model has the advantages that: the ripple eliminating circuit is configured to form an input rectifying circuit, the LED load, the ripple eliminating circuit and the dimming control circuit to form a direct current path, ripples existing in a direct current voltage output by a direct current power supply are eliminated, the defect of stroboscopic LED load is overcome, and the lighting effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of a ripple-free LED driving power supply of the first embodiment.
Fig. 2 is a schematic structural diagram of a ripple-free LED driving power supply of a second embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described with reference to the following embodiments and accompanying drawings.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.
In the description of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may include other elements not expressly listed, in addition to those listed.
According to the utility model discloses an aspect provides a remove ripple LED drive power supply.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a ripple-free LED driving power supply according to a first embodiment. As shown in fig. 1, the ripple-free LED driving power supply includes a positive power supply node +, a negative power supply node-, an input rectification circuit 100, a dimming control circuit 200, and a ripple cancellation circuit 300, and is configured to drive an LED load 400.
The positive power supply node + is used for being connected with the positive electrode of the external LED load 400; negative supply node-for connection to the negative of an external LED load 400; the input end of the input rectifying circuit 100 is used for accessing alternating current commercial power, and the output end of the input rectifying circuit 100 is connected with the positive power supply node +; the dimming control circuit 200 is connected to the output end of the input rectification circuit 100, and takes power from the output end of the input rectification circuit 100; the ripple cancellation circuit 300 is connected to the dimming control circuit 200 and the negative power supply node respectively, and when the input end of the input rectification circuit 100 is connected to the ac voltage, the input rectification circuit 100, the LED load 400, the ripple cancellation circuit 300 and the dimming control circuit 200 form a dc path, and the ripple cancellation circuit 300 is used for eliminating the current ripple of the LED load 400.
In this embodiment, when the ac voltage is applied, the input rectification circuit 100 converts the ac voltage and outputs a dc voltage to supply power to the dimming control circuit 200, the ripple cancellation circuit 300, and the LED load 400, the input rectification circuit 100, the LED load 400, the ripple cancellation circuit 300, and the dimming control circuit 200 form a dc path, and the LED load 400 emits light. In the process of driving the LED load 400 to emit light, the dimming control circuit 200 collects current information of the dc path in real time to obtain a current sampling signal, the dimming control circuit 200 adjusts the current on the dc path according to the collected current sampling signal to make the LED load 400 work in a constant current environment, the ripple cancellation circuit 300 subtracts an excess voltage from the voltage flowing out from the cathode of the LED load 400 through a built-in ripple removal LDO (linear regulator), so as to generate a regulated output voltage and cancel a low-frequency ripple current in the voltage.
The ripple-free LED driving power supply provided in this embodiment forms a direct current path by configuring the ripple cancellation circuit 300, the input rectification circuit 100, the LED load 400, the ripple cancellation circuit 300, and the dimming control circuit 200, eliminates ripples in the direct current voltage output by the direct current power supply, overcomes the defect of stroboscopic LED load 400, and improves the lighting effect.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a ripple-free LED driving power supply according to a second embodiment.
The input rectification circuit 100 described in this embodiment includes a fuse FR1 and a rectifier bridge BD 1.
Specifically, one end of the fuse FR1 is used for connecting the live wire L, the other end of the fuse FR1 is connected to the first input end of the rectifier bridge BD1, the second input end of the rectifier bridge BD1 is used for connecting the zero line N, the first output end of the rectifier bridge BD1 is connected to the positive power supply node +, and the second output end of the rectifier bridge BD1 is grounded.
Fuse FR1 connects in series on live wire L, prevents that overcurrent input from damaging the circuit structure, and rectifier bridge BD1 rectifies the alternating voltage of access, converts direct voltage into, and rectifier bridge BD1 exports the direct voltage that obtains through its first output.
The dimming control circuit 200 described in this embodiment is a linear dimming control circuit 200.
Specifically, the dimming control circuit 200 includes a dimming control module U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first electrolytic capacitor CE1, and a first diode D1.
More specifically, the dimming control module U1 is configured with a power supply input terminal, a current sampling terminal, a voltage feedback terminal, a linear drain terminal and a chip ground terminal, the power supply input terminal of the dimming control module U1 is connected to the output terminal of the input rectification circuit 100 through a first resistor R1, the current sampling terminal of the dimming control module U1 is connected to ground through a second resistor R2, the voltage feedback terminal of the dimming control module U1 is connected to the linear drain terminal of the dimming control module U1 through a third resistor R3, the linear drain terminal of the dimming control module U drain terminal 1 is connected to the ripple cancellation circuit 300, one end of a fourth resistor R4 and the anode of a first electrolytic capacitor CE1 are connected to the cathode of a first diode D1, the other end of the fourth resistor R4 and the cathode of a first electrolytic capacitor CE1 are connected to the linear drain terminal of the dimming control module U1, and the chip ground terminal of the dimming control module U1 is connected to ground.
The dimming control module U1 is BP5178FH series chip.
The power supply input end of the dimming control module U1 takes power from the input rectifying circuit 100 through a first resistor R1; the powered dimming control module U1 starts to work, a linear MOS transistor is arranged in the dimming control module U1, the dimming control module U1 controls the on-off of the linear drain end of the linear MOS transistor, the voltage output from the ripple cancellation circuit 300 flows into the dimming control module U1 through the conducted linear drain end, and is grounded through the chip ground end of the dimming control module U1, so that the input rectification circuit 100, the LED load 400, the ripple cancellation circuit 300 and the dimming control circuit 200 form a direct current path; the current sampling end of the dimming control module U1 collects current information of the dc path in real time through the second resistor R2, so as to obtain a current sampling signal, and the dimming control module U1 adjusts the current on the dc path according to the collected current sampling signal, so that the LED load 400 works in a constant current environment; the voltage feedback end of the dimming control module U1 collects the voltage flowing to the dimming control module U1 in real time through the third resistor R3, and the voltage input is prevented from causing damage to the dimming control module U1.
The ripple cancellation circuit 300 according to this embodiment includes a ripple cancellation module U2.
Specifically, the ripple cancellation module U2 is configured with a power supply input terminal, a chip ground terminal, and a linear drain terminal, the power supply input terminal of the ripple cancellation module U2 is connected to the positive power supply node +, the linear drain terminal of the ripple cancellation module U2 is connected to the negative power supply node-, and the chip ground terminal of the ripple cancellation module U2 is connected to the dimming control circuit 200.
The ripple eliminating module U2 is a BP5659B series chip.
Ripple elimination module U2 embeds has the ripple LDO (linear voltage regulator) of going, ripple elimination module U2 gets electricity from the output of input rectifier module through its power supply input end, the voltage that flows out from LED load 400 negative pole is followed ripple elimination module U2's linear drain end input, go the ripple processing by going the ripple LDO, in subtract the excess voltage in LED load 400 negative pole voltage, produce the output voltage through the regulation, the output voltage after the regulation is followed ripple elimination module U2's chip ground end output and is flowed to dimming control circuit 200, play the effect of the low frequency ripple electric current in the elimination voltage.
According to the utility model discloses a second aspect provides a LED lamp, and this LED lamp includes that foretell removes ripple LED drive power supply, and this removes ripple LED drive power supply's concrete structure refers to above-mentioned embodiment, because this embodiment the LED lamp adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not repeated here one by one.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A ripple-free LED driving power supply, comprising:
the positive supply node is used for being connected with the positive electrode of an external LED load;
the negative power supply node is used for being connected with the negative electrode of an external LED load;
the input end of the input rectifying circuit is used for accessing alternating current commercial power, and the output end of the input rectifying circuit is connected with the positive power supply node;
the dimming control circuit is connected with the output end of the input rectifying circuit and takes electricity from the output end of the input rectifying circuit;
the ripple eliminating circuit is respectively connected with the dimming control circuit and the negative electrode power supply node, when the input end of the input rectifying circuit is connected with alternating voltage, the input rectifying circuit, the LED load, the ripple eliminating circuit and the dimming control circuit form a direct current path, and the ripple eliminating circuit is used for eliminating current ripples of the LED load.
2. The ripple-free LED drive power supply of claim 1, wherein the input rectification circuit comprises a fuse and a rectification bridge;
one end of the fuse is used for connecting a live wire, the other end of the fuse is connected with a first input end of the rectifier bridge, a second input end of the rectifier bridge is used for connecting a zero line, a first output end of the rectifier bridge is connected with a positive power supply node, and a second output end of the rectifier bridge is grounded.
3. The ripple-free LED driving power supply according to claim 1, wherein the dimming control circuit is a linear dimming control circuit.
4. The ripple-free LED driving power supply according to claim 3, wherein the dimming control circuit comprises a dimming control module, a first resistor, a second resistor, a third resistor, a fourth resistor, a first electrolytic capacitor and a first diode;
the dimming control module is provided with a power supply input end, a current sampling end, a voltage feedback end, a linear drain end and a chip ground end, the power supply input end of the dimming control module is connected with the output end of the input rectification circuit through a first resistor, the current sampling end of the dimming control module is grounded through a second resistor, the voltage feedback end of the dimming control module is connected with the linear drain end of the dimming control module through a third resistor, the linear drain end of the dimming control module is connected with a ripple eliminating circuit, one end of a fourth resistor and the anode of a first electrolytic capacitor are connected with the cathode of a first diode, the other end of the fourth resistor and the cathode of the first electrolytic capacitor are connected with the linear drain end of the dimming control module, and the chip ground end of the dimming control module is grounded.
5. The ripple-free LED driving power supply according to claim 4, wherein the dimming control module is a BP5178FH series chip.
6. The ripple-free LED drive power supply of claim 1, wherein the ripple cancellation circuit comprises a ripple cancellation module;
the ripple elimination module is configured with power supply input end, chip ground and linear drain terminal, the power supply input end and the anodal power supply node of ripple elimination module are connected, the linear drain terminal and the negative pole power supply node of ripple elimination module are connected, the chip ground of ripple elimination module is connected with dimming control circuit.
7. The ripple-free LED driving power supply according to claim 6, wherein the ripple cancellation module is a BP5659B series chip.
8. An LED lamp comprising the de-rippled LED driving power supply of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220707883.XU CN217116466U (en) | 2022-03-29 | 2022-03-29 | Ripple-removing LED driving power supply and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220707883.XU CN217116466U (en) | 2022-03-29 | 2022-03-29 | Ripple-removing LED driving power supply and LED lamp |
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| Publication Number | Publication Date |
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| CN217116466U true CN217116466U (en) | 2022-08-02 |
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| CN202220707883.XU Active CN217116466U (en) | 2022-03-29 | 2022-03-29 | Ripple-removing LED driving power supply and LED lamp |
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- 2022-03-29 CN CN202220707883.XU patent/CN217116466U/en active Active
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