CN206118125U - LED power supply circuit and LED lamps and lanterns - Google Patents
LED power supply circuit and LED lamps and lanterns Download PDFInfo
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- CN206118125U CN206118125U CN201621146894.6U CN201621146894U CN206118125U CN 206118125 U CN206118125 U CN 206118125U CN 201621146894 U CN201621146894 U CN 201621146894U CN 206118125 U CN206118125 U CN 206118125U
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- module
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- lightning strike
- strike protection
- outfan
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model belongs to the technical field of the LED drive, a LED power supply circuit and LED lamps and lanterns is provided. In the carrier roller device, through adopting the LED power supply circuit including a lightning strike protection module and the 2nd lightning strike protection module, LED power supply circuit makes when meetting the thunderbolt situation, the thunderbolt voltage of lightning strike protection pair of module rectifier module output absorbs the processing, when power module's current input and the port pressure differential between the earthing terminal are higher than the clamp voltage of the 2nd lightning strike protection module, the 2nd lightning strike protection pair of module port pressure differential carries out the clamper to be handled, so that power module provides supply access to the LED load, and then make when meetting the thunderbolt, a lightning strike protection pair of module rectifier module's rear end circuit is protected, the 2nd lightning strike protection pair of module power module protects, thereby prevent effectively that the thunderbolt from producing the damage to LED power supply circuit.
Description
Technical field
This utility model belongs to field of LED drive technology, more particularly to a kind of LED power circuit and LED lamp.
Background technology
Because LED has the advantages that low pressure, energy-conservation, long service life are many, obtain in every field at present extensively
Application, especially LED substitute traditional electric filament lamp as the application of mains lighting supply, therefore, linear LED power is also increasingly weighed
Will.
In use, especially outdoor linear LED power, is struck by lightning very big to its destructiveness linear LED power,
And lightning proof protection module is not provided with existing linear LED power, and then the anti-thunder of power supply cannot be lifted in thunderbolt
Ability is hit, so as to protect to power supply, therefore, when existing linear LED power runs into thunderbolt, it is easily caused linear
Component damage in LED power, and then normally cannot power for LED load, LED load will be burnt what is more.
In sum, when existing linear LED power presence runs into thunderbolt, the first device being easily caused in linear LED power
Part is damaged, and then normally cannot be powered for LED load, and the problem of LED load will be burnt what is more.
Utility model content
The purpose of this utility model is to provide a kind of LED power circuit and LED lamp, it is intended to solved existing linear
When LED power presence runs into thunderbolt, the component damage being easily caused in linear LED power, and then cannot be normally LED load
Power supply, will burn what is more the problem of LED load.
This utility model is achieved in that a kind of LED power circuit, for powering for LED load, the LED power
Circuit includes rectification module and supply module, and the input of the rectification module is connected with external power source, the rectification module
First outfan is connected with the voltage input end of the supply module and the input of the LED load, the rectification module
The second outfan and the earth terminal of the supply module be connected to equipotential end altogether, the supply module includes at least one electric current
Input, the LED load includes at least one outfan, and the outfan of the current input terminal and the LED load is one by one
Correspondence connection, the LED power circuit also includes：
First lightning strike protection module and the second lightning strike protection module；
The input of the first lightning strike protection module is connected with the first outfan of the rectification module, first thunder
Hit the outfan of protection module to be connected with the second outfan of the rectification module；The second lightning strike protection module is included at least
One input, and the input of the second lightning strike protection module connects one to one with the outfan of the LED load,
The outfan of the second lightning strike protection module is connected with the outfan of the first lightning strike protection module；
When the LED power circuit runs into thunderbolt situation, the first lightning strike protection module is defeated to the rectification module
The thunderbolt voltage for going out carries out absorption process, when the port differential pressure between the current input terminal and earth terminal of the supply module is higher than
During the clamp voltage of the second lightning strike protection module, the second lightning strike protection module is carried out at clamper to the port differential pressure
Reason, so that the supply module provides supply access to the LED load.
Another object of the present utility model also resides in a kind of LED lamp of offer, and the LED lamp includes above-mentioned LED power
Circuit.
In this utility model, by electric using the LED for including the first lightning strike protection module and the second lightning strike protection module
Source circuit so that when LED power circuit runs into thunderbolt situation, the thunderbolt electricity that the first lightning strike protection module is exported to rectification module
Pressure carries out absorption process, when the port differential pressure between the current input terminal and earth terminal of supply module is higher than the second lightning strike protection mould
During the clamp voltage of block, the second lightning strike protection module carries out clamper process to port differential pressure, so that supply module is carried to LED load
For supply access so that when thunderbolt is run into, the first lightning strike protection module is protected to the back-end circuit of rectification module, and second
Lightning strike protection module is protected to supply module, to provide normal supply access as LED load, is solved existing linear
When LED power presence runs into thunderbolt, the component damage being easily caused in linear LED power, and then cannot be normally LED load
Power supply, will burn what is more the problem of LED load.
Description of the drawings
Fig. 1 is the modular structure schematic diagram of the LED power circuit that the embodiment of this utility model one is provided；
Fig. 2 is the modular structure schematic diagram of the LED power circuit that another embodiment of this utility model is provided；
Fig. 3 is the electrical block diagram of the LED power circuit that the embodiment of this utility model one is provided；
Fig. 4 is the electrical block diagram of the LED lamp that the embodiment of this utility model one is provided.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
Realization of the present utility model is described in detail below in conjunction with concrete accompanying drawing：
Fig. 1 shows the modular structure of the LED power circuit that the embodiment of this utility model one is provided, for the ease of saying
It is bright, the part related to this utility model embodiment is illustrate only, details are as follows：
First, it is notable that the LED power circuit 10 shown in this utility model embodiment is applicable not only to common mode thunder
Hit, it is equally applicable to differential mode thunderbolt.
As shown in figure 1, the LED power circuit 10 that this utility model embodiment is provided is mainly used in being powered for LED load 20,
And the LED power circuit 10 includes rectification module 100 and supply module 102, the input and external power source of rectification module 100
(not shown) connection, the first outfan of rectification module 100 and the voltage input end of supply module 102 and LED load
20 input connection, the second outfan of rectification module 100 is connected to altogether equipotential end, supplies with the earth terminal of supply module 102
Electric module 102 includes at least one current input terminal, and LED load 20 includes at least one outfan, and supply module 102
Current input terminal connects one to one with the outfan of LED load 20.
Further, the LED power circuit 10 also includes the first lightning strike protection module 101 and the second lightning strike protection module
103。
Wherein, the input of the first lightning strike protection module 101 is connected with the first outfan of rectification module 100, the first thunder
Hit the outfan of protection module 101 to be connected with the second outfan of rectification module 100；Second lightning strike protection module 103 include to
An input, and the input of the second lightning strike protection module 103 less connects one to one with the outfan of LED load 20,
The outfan of the second lightning strike protection module 103 is connected with the outfan of the first lightning strike protection module 101.
When LED power circuit 10 runs into thunderbolt situation, the thunder that the first lightning strike protection module 101 is exported to rectification module 100
Hitting voltage carries out absorption process, when the port differential pressure between the current input terminal and earth terminal of supply module 102 is higher than the second thunder
When hitting the clamp voltage of protection module 103, the second lightning strike protection module 103 carries out clamper process to port differential pressure, so that power supply
Module 102 to LED load 20 provides supply access.
Specifically, when LED power circuit 10 runs into thunderbolt situation, can wrap in the commutating voltage of the output of rectification module 100
The thunderbolt voltage of the up to upper kilovolt produced containing moment, now the thunderbolt voltage of the first lightning strike protection module 101 pairs absorb
Process, to guarantee that the commutating voltage that rectification module 100 is exported will not produce damage to rear end supply module 102 and LED load 20
Do harm to, and the commutating voltage of the output of rectification module 100 can also power to supply module 102 with LED load 20；Meanwhile, mould of powering
Block 102 works according to the commutating voltage that rectification module 100 is exported, and when the current input terminal and earth terminal of supply module 102
Between port differential pressure higher than the second lightning strike protection module 103 clamp voltage when, the second lightning strike protection module 103 is opened and right
Port differential pressure carries out clamper process, so that supply module 102 provides supply access to LED load 20.
Further, as the preferred embodiment of this utility model one, as shown in Fig. 2 the first lightning strike protection module 101 includes
Filter unit 101a and lightning strike protection unit 101b.
Wherein, the input of filter unit 101a connects altogether to form the first thunderbolt guarantor with the input of lightning strike protection unit 101b
The input of shield module 101, the outfan of filter unit 101a connects to form first altogether with the outfan of lightning strike protection unit 101b
The outfan of lightning strike protection module 101.
Specifically, filter unit 101a is used to be filtered the thunderbolt voltage of the output of rectification module 100 process, and thunderbolt is protected
Shield unit 101b is used for when filtered thunderbolt voltage is higher than its clamp voltage, and filtered thunderbolt voltage is carried out at absorption
Reason.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, lightning strike protection unit 101b includes the
One transient voltage suppressor TVS1, the first end of the first transient voltage suppressor TVS1 is lightning strike protection unit 101b
Input, the second end of the first transient voltage suppressor TVS1 for lightning strike protection unit 101b outfan.
It should be noted that in this utility model embodiment, lightning strike protection unit 101b can be used for suppression common mode thunderbolt
Produced instantaneous pressure, it is also possible to suppress the instantaneous pressure of differential mode thunderbolt institute bad student, and produced when suppression common mode thunderbolt is used for
During raw instantaneous pressure, lightning strike protection unit 101b can adopt the first transient voltage suppressor TVS1 reality shown in Fig. 3
It is existing；When for the instantaneous pressure for suppressing differential mode thunderbolt institute bad student, lightning strike protection unit 101b can be in the first transition shown in Fig. 3
Pressure-sensitive diode in parallel on the basis of diode TVS1 is suppressed to realize.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, filter unit 101a includes filtered electrical
Hold C1, the first end of filter capacitor C1 is the input of filter unit 101a, and the first end of filter capacitor C1 is filter unit
The outfan of 101a.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, supply module 102 includes divider resistance
R1, current-limiting resistance R2, maintenance electric capacity C2 and power supply control chip U1.
Wherein, the first end of divider resistance R1 for supply module 102 voltage input end, second end of divider resistance R1 with
First pin 1 of power supply control chip U1 connects, and first end and the 4th pin 4 of power supply control chip U1 of current-limiting resistance R2 connect
Connect, second end of current-limiting resistance R2 is the outfan of supply module 102, maintains the first end and power supply control chip U1 of electric capacity C2
The 3rd pin 3 connect, maintain electric capacity C2 the second end be connected with second end of current-limiting resistance R2, power supply control chip U1's connects
Ground terminal GND for supply module 102 earth terminal, the second pin 2 of power supply control chip U1 and the second end for maintaining electric capacity C2 with
And second end of current-limiting resistance R2 connects altogether, power supply control chip U1 includes at least one electric current input pin, and the electric current input is drawn
Foot is the current input terminal of supply module 102.
It should be noted that the number of the electric current input pin of power supply control chip U1 determines the electricity of supply module 102
The number of stream input, and the outfan number phase of the electric current input pin number of power supply control chip U1 and LED load 20
Together；Preferably, in the present embodiment, the electric current input pin number of power supply control chip U1 is four, and it is respectively first electric
Stream input pin 8, the second electric current input pin 7, the 3rd electric current input pin 6 and the 4th electric current input pin 5.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, the second lightning strike protection module 103 includes
At least one transient voltage suppressor, the first end of transient voltage suppressor is the second lightning strike protection module 103
Input, the second end of transient voltage suppressor is the outfan of the second lightning strike protection module 103；It should be noted that
In the present embodiment, the number of the input of the second lightning strike protection module 103 is identical with the number of the outfan of LED load 20,
And due to the number of the outfan of LED load 20 it is identical with the electric current input pin number of power supply control chip U1, therefore, it is excellent
Choosing, in this utility model second embodiment, the input of the second lightning strike protection module 103 is four, i.e., the second thunderbolt is protected
Shield module 103 includes four transient voltage suppressors, its second transient voltage suppressor TVS2 of difference, the 3rd transition
Voltage suppression diode TVS3, the 4th transient voltage suppressor TVS4 and the 5th transient voltage suppressor TVS5.
Wherein, the first end of four transient voltage suppressors TVS2, TVS3, TVS4 and the TVS5 is respectively second
The input of lightning strike protection module 103, the second of four transient voltage suppressors TVS2, TVS3, TVS4 and the TVS5
End connects altogether the outfan to form the second lightning strike protection module 103.Specifically, the first of the second transient voltage suppressor TVS2
Hold as the first input end of the second lightning strike protection module 103, the first end of the 3rd transient voltage suppressor TVS3 is second
Second input of lightning strike protection module 103, the first end of the 4th transient voltage suppressor TVS4 is the second lightning strike protection
3rd input of module 103, the first end of the 5th transient voltage suppressor TVS5 is the second lightning strike protection module 103
4th input.
Further, LED load 20 includes at least one LED load, number and the power supply control chip U1 of the LED load
Electric current input pin number it is identical, accordingly, as the preferred embodiment of this utility model one, as shown in Fig. 2 LED load 20
Including four LED loads, four LED loads are respectively the first LED load 201, the second LED load 202, the 3rd LED load
203 and the 4th LED load 204.
Wherein, the input of the first LED load 201 for LED load 20 input, the outfan of the first LED load 201
It is connected with the input of the second LED load 202, and the outfan of the first LED load 201 is the first output of LED load 20
End, it is connected with the first end of the second transient voltage suppressor TVS2, the outfan and the 3rd LED of the second LED load 202
The input connection of load 203, and the outfan of the second LED load 202 is the second outfan of LED load 20, it is with the
The first end connection of three transient voltage suppressors TVS3, the outfan of the 3rd LED load 203 and the 4th LED load 204
Input connects, and the outfan of the 3rd LED load 203 is the 3rd outfan of LED load 20, itself and the 4th transient voltage
Suppress the first end connection of diode TVS4, the outfan of the 4th LED load 204 for LED load 20 the 4th outfan, its with
The first end connection of the 5th transient voltage suppressor TVS5.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, the first LED load 201 includes first
LED 1, the second LED load 202 includes the second LED 2, and the 3rd LED load 203 includes the 3rd
Optical diode LED3, the 4th LED load 204 includes the 4th LED 4.
Specifically, the anode of the first LED 1 is the input of the first LED load 201, the first light-emitting diodes
The negative electrode of pipe LED1 is the outfan of the first LED load 201；The anode of the second LED 2 is the second LED load 202
Input, the negative electrode of the second LED 2 is the outfan of the second LED load 202；3rd LED 3
Anode be the 3rd LED load 203 input, the negative electrode of the 3rd LED 3 is the output of the 3rd LED load 203
End；The anode of the 4th LED 4 is the input of the 4th LED load 204, the negative electrode of the 4th LED 4
For the outfan of the 4th LED load 204.
It should be noted that in this utility model embodiment, the first LED load 201, the second LED load the 202, the 3rd
The LED load of LED load 203 and the 4th may each comprise multiple LEDs, and the plurality of LED can be adopted
Connected with the mode of series connection, it would however also be possible to employ parallel way connects, the structure being not limited to herein shown in Fig. 3.
Additionally, the load in this utility model embodiment in the electric current input pin of power supply control chip U1, LED load 20
The number of the transient voltage suppressor in number and the second lightning strike protection module 103 is exemplary illustration, and it is not
It is confined to this.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, rectification module 100 is full-bridge type rectification
Circuit, it includes the first commutation diode D1, the second commutation diode D2, the 3rd commutation diode D3 and the pole of the 4th rectification two
Pipe D4.
Wherein, the anode of the first commutation diode D1 connects to form rectification mould altogether with the negative electrode of the 3rd commutation diode D3
The negative electrode of the first input end of block 100, the negative electrode of the first commutation diode D1 and the second commutation diode D2 connects to form rectification altogether
First outfan of module 100, anode and the anode of the 4th commutation diode D4 of the 3rd commutation diode D3 connect to form whole altogether
Second outfan of flow module 100, the anode of the second commutation diode D2 connects altogether to be formed with the negative electrode of the 4th commutation diode D4
Second input of rectification module 100.
Further, as the preferred embodiment of this utility model one, as shown in figure 3, what this utility model embodiment was provided
LED power circuit 10 also includes that F1, electric fuse F1 play a protective role to LED power circuit 10, under normal circumstances,
When the voltage instantaneous of external power source are too high, electric fuse F1 will fuse, and then prevent LED power circuit 10 from damaging
It is bad.
Below by taking the particular circuit configurations shown in Fig. 3 as an example, the LED power circuit 10 that this utility model embodiment is provided
Operation principle illustrate, details are as follows：
As shown in figure 3, the LED power circuit 10 that this utility model embodiment is provided is under normal circumstances, i.e., do not meet
During to thunderbolt situation, the first commutation diode D1, the second commutation diode D2 in rectification module 100, the 3rd commutation diode
D3 and the 4th commutation diode D4 carry out exporting commutating voltage after arrangement process to the voltage that external power source is exported, filter capacitor
C1 is filtered process to commutating voltage, to eliminate commutating voltage in noise signal, and due to the electricity of now commutating voltage
Pressure amplitude value is not above the reference voltage of the first transient voltage suppressor TVS1, and the reference voltage refers to prevent rear end from supplying
The voltage limits that electric control chip U1 and LED load are damaged, therefore, the first transient voltage suppressor TVS1 not work
Make, rectification module 100 exports commutating voltage to power supply control chip U1 and LED load 20.
After power supply control chip U1 receives commutating voltage by sub-resistance R1, power supply control chip U1 is according to the rectified current
Pressure work, wherein divider resistance R1 is used to carry out voltage division processing to commutating voltage, to prevent from being input into into power supply control chip U1
Voltage it is excessive, and then cause power supply control chip because overtension be damaged；Simultaneously as the rectification of rectification module 100
The commutating voltage for exporting afterwards is the sine wave of only positive half, therefore, the voltage magnitude of the commutating voltage pushing away over time
Shifting is stepped up, when the voltage magnitude of the commutating voltage reaches the electric conduction of the first LED 1 in LED load 20
During pressure, the first LED 1 will output current to power supply control chip U1.
And because in normal condition, the port voltage of the 8th pin 8 of power supply control chip U1 is with its earth terminal GND's
Port pressure between the port voltage of port differential pressure, the port voltage of the 7th pin 7 and its earth terminal GND between port voltage
The port electricity of difference, the port differential pressure between the port voltage of the 6th pin 6 and the port voltage of its earth terminal GND, the 5th pin 5
Within normal range, i.e., power supply control chip U1 can be normal for port differential pressure between pressure and the port voltage of its earth terminal GND
In the range of work, therefore, the second transient voltage suppressor TVS2 now in the second lightning strike protection module 103, the 3rd
Transient voltage suppressor TV3, the 4th transient voltage suppressor TVS4 and the 5th transient voltage suppressor
TVS5 does not work, and when the first LED 1 outputs current to power supply control chip U1, power supply control chip U1
Control the 8th pin 8 to open, and current path is formed between the 8th pin 8 and the 4th pin 4, and then cause first to light
Diode (LED) 1 lights；It should be noted that in this utility model embodiment, maintaining electric capacity C2 to be used to maintain power supply control core
The operating current of piece U1, power supply control is flow through to guarantee the normal work of power supply control chip U1, and current-limiting resistance R2 for control
The electric current of coremaking piece U1, causes to damage to prevent electric current excessive to power supply control chip U1.
When the voltage magnitude of the commutating voltage is increased to can be with the first LED 1 and the second light emitting diode
During the conducting voltage sum of LED2, the first LED 1 is simultaneously turned on the 2nd LED light emitting diode D2, and first lights
The current segment of diode (LED) 1 flow to the second LED 2, partly flow to the 8th pin 8 of power supply control chip U1,
And the 2nd LED LEDs 2 output current to the 7th pin 7 of power supply control chip U1, now power supply control chip
U1 controls the 8th pin 8 of itself and disconnects, and the 7th pin is opened, and is led to forming electric current between the 7th pin 7 and the 4th pin 4
Road, and then cause the first LED 1 and the second LED 2 simultaneously luminous.In the same manner, power supply control chip U1
The current path of the LED LEDs 3 of the first LED 1 to the 3rd can also be formed, so that first luminous two
Pole pipe LED1 is simultaneously luminous to the 3rd LED LEDs 3, and the light-emitting diodes of the first LED 1 to the 4th
The current path of pipe LED4, so that the LED LEDs 4 of the first LED 1 to the 4th are simultaneously luminous, concrete mistake
Journey refers to the simultaneously luminous operation principle of 1 and second LED of above-mentioned first LED 2, herein no longer
Repeat.
And when thunderbolt situation is run into, due to the voltage instantaneous increase in the external power source output of thunderbolt moment, and can be high
The thunderbolt voltage of the up to upper kilovolt produced comprising moment up in upper kilovolt, therefore the commutating voltage of the output of rectification module 100, and
When reference voltage of the thunderbolt voltage higher than the first transient voltage suppressor TVS1, the first transient voltage suppressor
TVS1 is opened, and carries out absorption process to the thunderbolt voltage in rectification module 100, with prevent from being struck by lightning voltage to it is too high and will power supply
Control chip U1 is damaged with LED load 20, and guarantees that the commutating voltage that rectification module 100 is exported can also be to supply module 102
Power with LED load 20.
Simultaneously as the LED power electricity provided with this utility model embodiment in the live wire L of thunderbolt moment external power source
Between the earth terminal GND (the earth) on road 10, meeting between the earth terminal of LED power circuit 10 and the earth terminal of power supply control chip U1
Have leakage current to occur, and the presence of the leakage current will cause the 8th pin 8 of power supply control chip U1 port voltage and its
The port voltage of port differential pressure, the port voltage of the 7th pin 7 and its earth terminal GND between the port voltage of earth terminal GND
Between port differential pressure, the port voltage of the 6th pin 6 and its earth terminal GND port voltage between port differential pressure, the 5th
Port differential pressure between the port voltage of the port voltage of pin 5 and its earth terminal GND is excessive, and works as above-mentioned each port differential pressure
The respectively greater than clamp voltage of the second transient voltage suppressor TVS2, the clamper of the 3rd transient voltage suppressor TVS3
The clamper of voltage, the clamp voltage of the 4th transient voltage suppressor TVS4 and the 5th transient voltage suppressor TVS5
During voltage, the clamp voltage refers to ensure that above-mentioned each port differential pressure belongs to the voltage limits of normal range, the second wink
Time variant voltage suppresses transient voltage suppressors TVS5 of diode TVS2 to the 5th to open, and each self-corresponding port differential pressure is entered
The process of row clamper, to guarantee the normal work of power supply control chip U1, and then causes electric control chip U1 to be in LED load 20
Light emitting diode provides supply access.
Furthermore, it is necessary to explanation, in this utility model embodiment, due to the live wire L in thunderbolt moment external power source
And the earth terminal GND of LED power circuit 10 between, the earth terminal of the earth terminal of LED power circuit 10 and power supply control chip U1
Between the leakage current that occurs can also flow other ports of power supply control chip U1, and then cause other power supply controls chip U1
Port voltage raise, and then cause power supply control chip U1 damage, the second pin the 2, the 3rd of such as power supply control chip U1
The pin 4 of pin 3 and the 4th, therefore, the second pin 2 of power supply control chip U1, the 3rd pin 3 and the 4th pin 4 occur
When port voltage is too high, the second transient voltage suppressor TVS2 to the 5th transient voltage suppressor TVS5 can also be right
There is port voltage and are suppressed in second pin 2, the 3rd pin 3 and the 4th pin 4, to prevent second pin 2, the 3rd pin
3 and the port voltage of the 4th pin 4 it is too high, it is achieved thereby that the overvoltage protection of LED power circuit 10 so that LED power circuit
10 normal works.
Furthermore, the leakage occurred between the live wire L and the earth terminal GND of LED power circuit 10 of thunderbolt moment external power source
Electric current, may further result in the first LED 1, the second LED the 2, the 3rd luminous two in LED load 20
The voltage of each node of pole pipe LED3 and the 4th LED 4 changes, now, the second lightning strike protection module
The second transient voltage suppressor TVS2 in 103 to the 5th transient voltage suppressor TVS5 can respectively pair with first
The LEDs of optical diode LED1 to the 4th 4 carry out clamper process, and then protect the first LED 1 to the 4th
LED 4 is without damage.
Fig. 4 shows the LED lamp 30 that the embodiment of this utility model one is provided, for convenience of description, illustrate only with
The related part of this utility model embodiment, details are as follows：
As shown in figure 4, the LED lamp 30 that this utility model embodiment is provided includes LED power circuit 10 and LED load
20, LED power circuit 10 is used to be powered for LED load 20.Due to this utility model embodiment provide LED power circuit 10 with
LED power circuit 10 shown in Fig. 3 is identical, therefore, the specific works of the LED lamp 30 that this utility model embodiment is provided are former
Reason, refers to the detailed description previously with regard to Fig. 3, and here is omitted.
In this utility model embodiment, by adopting the first lightning strike protection module 101 and the second lightning strike protection mould are included
The LED power circuit 10 of block 103 so that when LED power circuit 10 runs into thunderbolt situation, the first lightning strike protection module 101 pairs
The thunderbolt voltage of the output of rectification module 100 carries out absorption process, when between the current input terminal and earth terminal of supply module 102
When port differential pressure is higher than the clamp voltage of the second lightning strike protection module 103, the second lightning strike protection module 103 is carried out to port differential pressure
Clamper process, so that supply module 102 provides supply access to LED load 20 so that when thunderbolt is run into, the first lightning strike protection
Module 101 is protected to the back-end circuit of rectification module 100, and the second lightning strike protection module 103 is protected to supply module 101
Shield, to provide normal supply access as LED load 20, when solving existing linear LED power presence and running into thunderbolt, easily
Cause the component damage in linear LED power, and then normally cannot power for LED load, LED load will be burnt what is more
Problem.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit this utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (7)
1. a kind of LED power circuit, for powering for LED load, the LED power circuit includes rectification module with power supply mould
Block, the input of the rectification module is connected with external power source, the first outfan and the supply module of the rectification module
Voltage input end and the LED load input connection, the second outfan of the rectification module and the power supply mould
The earth terminal of block is connected to altogether equipotential end, and the supply module includes at least one current input terminal, the LED load include to
A few outfan, the current input terminal connects one to one with the outfan of the LED load, it is characterised in that described
LED power circuit also includes：
First lightning strike protection module and the second lightning strike protection module；
The input of the first lightning strike protection module is connected with the first outfan of the rectification module, and first thunderbolt is protected
The outfan of shield module is connected with the second outfan of the rectification module；The second lightning strike protection module includes at least one
Input, and the input of the second lightning strike protection module connects one to one with the outfan of the LED load, it is described
The outfan of the second lightning strike protection module is connected with the outfan of the first lightning strike protection module；
When the LED power circuit runs into thunderbolt situation, what the first lightning strike protection module was exported to the rectification module
Thunderbolt voltage carries out absorption process, when the port differential pressure between the current input terminal and earth terminal of the supply module is higher than described
During the clamp voltage of the second lightning strike protection module, the second lightning strike protection module carries out clamper process to the port differential pressure,
So that the supply module provides supply access to the LED load.
2. LED power circuit according to claim 1, it is characterised in that the first lightning strike protection module includes filtering
Unit and lightning strike protection unit；
The input of the filter unit connects altogether to form the first lightning strike protection mould with the input of the lightning strike protection unit
The input of block, the outfan of the filter unit connects altogether to form first thunderbolt with the outfan of the lightning strike protection unit
The outfan of protection module；
The filter unit is used to be filtered process, the lightning strike protection unit to the thunderbolt voltage of rectification module output
For when filtered thunderbolt voltage is higher than its clamp voltage, to the filtered thunderbolt voltage absorption process being carried out.
3. LED power circuit according to claim 2, it is characterised in that the lightning strike protection unit includes the first transition
Voltage suppression diode, the first end of first transient voltage suppressor is the input of the lightning strike protection unit,
Second end of first transient voltage suppressor is the outfan of the lightning strike protection unit.
4. LED power circuit according to claim 2, it is characterised in that the filter unit includes filter capacitor, described
The first end of filter capacitor is the input of the filter unit, and the first end of the filter capacitor is the defeated of the filter unit
Go out end.
5. LED power circuit according to claim 1, it is characterised in that the supply module includes divider resistance, current limliting
Resistance, maintenance electric capacity and power supply control chip；
The first end of the divider resistance is the voltage input end of the supply module, the second end of the divider resistance with it is described
The first pin connection of power supply control chip, the first end of the current-limiting resistance connects with the 4th pin of the power supply control chip
Connect, the second end of the current-limiting resistance is the outfan of the supply module, the first end of the maintenance electric capacity and the power supply
The 3rd pin connection of control chip, described to maintain the second end of electric capacity to be connected with the second end of the current-limiting resistance, the confession
The earth terminal of electric control chip is the earth terminal of the supply module, and the power supply control chip is input into including at least one electric current
Pin, the electric current input pin is the current input terminal of the supply module.
6. LED power circuit according to claim 1, it is characterised in that the second lightning strike protection module is included at least
One transient voltage suppressor, the first end of the transient voltage suppressor is the second lightning strike protection module
Input, the second end of the transient voltage suppressor is the outfan of the second lightning strike protection module.
7. a kind of LED lamp, including LED load, it is characterised in that the LED lamp is also included as claim 1 to 6 is arbitrary
LED power circuit described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621146894.6U CN206118125U (en) | 2016-10-20 | 2016-10-20 | LED power supply circuit and LED lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621146894.6U CN206118125U (en) | 2016-10-20 | 2016-10-20 | LED power supply circuit and LED lamps and lanterns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206118125U true CN206118125U (en) | 2017-04-19 |
Family
ID=58527368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621146894.6U Withdrawn - After Issue CN206118125U (en) | 2016-10-20 | 2016-10-20 | LED power supply circuit and LED lamps and lanterns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206118125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106376136A (en) * | 2016-10-20 | 2017-02-01 | 深圳市明微电子股份有限公司 | LED power circuit and LED lamp |
-
2016
- 2016-10-20 CN CN201621146894.6U patent/CN206118125U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106376136A (en) * | 2016-10-20 | 2017-02-01 | 深圳市明微电子股份有限公司 | LED power circuit and LED lamp |
| CN106376136B (en) * | 2016-10-20 | 2019-01-01 | 深圳市明微电子股份有限公司 | A kind of LED power circuit and LED lamp |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20190101 |
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| AV01 | Patent right actively abandoned |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |