CN206759775U - A kind of LED drive circuit and LED light emission device - Google Patents
A kind of LED drive circuit and LED light emission device Download PDFInfo
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- CN206759775U CN206759775U CN201720504119.1U CN201720504119U CN206759775U CN 206759775 U CN206759775 U CN 206759775U CN 201720504119 U CN201720504119 U CN 201720504119U CN 206759775 U CN206759775 U CN 206759775U
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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
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- 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 photoelectric lighting technical field, there is provided a kind of LED drive circuit and LED light emission device.The LED drive circuit connects AC network and LED light source module, including rectification module, energy storage filtration module, current stabilization module, pulse width modulation module, current limiting device and the first protection device.In the utility model, when LED light source module works, pulse signal is produced by pulse width modulation module and adjusts current signal by changing pulse duty cycle to adjust the brightness of LED light source module, so as to improve LED AC and CCG compatibility and input linear regulation；Meanwhile current limliting is carried out to pulse width modulation module by current limiting device, the first protection device carries out overcurrent protection to current limiting device, improves LED reliability and service life.
Description
Technical field
It the utility model is related to photoelectric lighting technical field, more particularly to a kind of LED drive circuit and LED light emission device.
Background technology
Light emitting diode (Light Emitting Diode, LED) is a kind of semiconductor devices that can be luminous, due to LED
Energy-conservation, long-life and it is widely used in photoelectric lighting technical field the advantages that high reliability.
The drive circuit of the LED lamp tube of compatible with alternating (AC) and Inductive ballast (CCG) is mainly self-excitation on the market at present
Vibrate RCC circuits.However, existing self-oscillation RCC circuits can not be completely under the conditions of AC and access CCG two states
The consistent of each parameter is kept, the brightness under the conditions of brightness ratio AC in compatible CCG is weak, therefore, the compatibility of drive circuit
Difference, input linear regulation are low so that output current and power output reduce, so as to reduce the brightness of fluorescent tube.And in order to carry
The input linear regulation of high drive circuit, modulation module can be typically added with adjusting pulsewidth, but the adjusting module of the addition
It is typically easy to easily be burned out because electric current is excessive so that the service life and reliability of fluorescent tube all reduce.
Therefore, there is AC and CCG poor compatibilities in existing LED lamp tube, input linear regulation is low, reliability is low and makes
The problem of with short life.
Utility model content
The utility model provides a kind of LED drive circuit and LED light emission device, it is intended to solves existing LED lamp tube and exists
AC and CCG poor compatibilities, the problem of input linear regulation is low, reliability is low and service life is short.
The utility model provides a kind of LED drive circuit, LED drive circuit connection AC network and LED light source
Module, the LED drive circuit include：
Rectification module, energy storage filtration module, current stabilization module, pulse width modulation module, current limiting device and the first protection device；
The first input end of the rectification module and the second input connect the AC network, the rectification module it is defeated
Go out the first end that end connects the energy storage filtration module, the second end of the energy storage filtration module connects the defeated of the current stabilization module
Enter end, the first output end of the current stabilization module is connected to the first input end of the LED light source module altogether, the current stabilization module
Second output end connects the second input of the LED light source module, and the controlled end of the current stabilization module connects the pulsewidth and adjusted
The control terminal of molding block, the earth terminal of the pulse width modulation module, the first end of the current limiting device and first protection
The first end of device connects altogether, and the second end of the second end of the current limiting device and first protection device is connected to ground altogether；
Output to the energy storage filters mould after the alternating current that the rectification module is provided the AC network carries out rectification
Block, the energy storage filtration module export direct current to the current stabilization module, institute after energy storage filtering is carried out to the alternating current after rectification
Stating output current signal after current stabilization module carries out current stabilization filtering to the direct current of input drives the LED light source module to work；
When the LED light source module works, the pulse width modulation module produces pulse signal and accounted for by changing pulsewidth
Empty current signal more described than regulation is to adjust the brightness of the LED light source module, and the current limiting device is to the pulsewidth modulation mould
Block carries out current limliting, and first protection device carries out overcurrent protection to the current limiting device.
The utility model additionally provides a kind of LED light emission device, and the LED light emission device is including LED light source module and such as
Upper described LED drive circuit.
The utility model is in LED drive circuit using rectification module, energy storage filtration module, current stabilization module, pulsewidth modulation
Module, current limiting device and the first protection device, when LED light source module works, pulse is produced by pulse width modulation module and believed
Number and by change pulse duty cycle adjust current signal to adjust the brightness of LED light source module, so as to improve LED AC and
CCG compatibility and input linear regulation；Meanwhile current limliting, the first protector are carried out to pulse width modulation module by current limiting device
Part carries out overcurrent protection to current limiting device, improves LED reliability and service life.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those skilled in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is the function structure chart for the LED drive circuit that the utility model embodiment provides；
Fig. 2 is another function structure chart for the LED drive circuit that the utility model embodiment provides；
Fig. 3 is the particular circuit configurations figure of the LED drive circuit shown in Fig. 1；
Fig. 4 is the particular circuit configurations figure of the LED drive circuit shown in Fig. 2.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
In description of the present utility model, it is to be understood that term " first ", " second " are only used for describing purpose, and
It is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
One or more this feature can be expressed or be implicitly included to the feature of " first ", " second ".
Fig. 1 shows the modular structure for the LED drive circuit that the utility model embodiment provides, for convenience of description, only
The part related to the utility model embodiment is shown, details are as follows：
It is LED drive circuit that LED drive circuit, which connects AC network 100 and LED light source module 101, AC network 100,
Alternating current is provided, driving LED light source module 101 works after LED drive circuit incoming transport electricity.Wherein, LED light source module 101
Including at least one LED.
LED drive circuit includes：Rectification module 102, energy storage filtration module 103, current stabilization module 104, pulse width modulation module
105th, the protection device 107 of current limiting device 106 and first.
The first input end of rectification module 102 and the second input connection AC network 100, the output of rectification module 102
The first end of end connection energy storage filtration module 103, the input of the second end connection current stabilization module 104 of energy storage filtration module 103,
First output end of current stabilization module 104 is connected to the first input end of LED light source module 101, the second output of current stabilization module 104 altogether
Second input of end connection LED light source module 101, the control of the controlled end connection pulse width modulation module 105 of current stabilization module 104
End, the first end of the earth terminal of pulse width modulation module 105, the first end of current limiting device 106 and the first protection device 107 are total to
Connect, the second end of the second end of current limiting device 106 and the first protection device 107 is connected to ground altogether.
The alternating current that rectification module 102 is provided AC network 100 is exported to energy storage filtration module 103 after carrying out rectification,
Energy storage filtration module 103 exports direct current to current stabilization module 104, current stabilization module after energy storage filtering is carried out to the alternating current after rectification
Output current signal driving LED light source module 101 works after the direct current of 104 pairs of inputs carries out current stabilization filtering.
When LED light source module 101 works, pulse width modulation module 105 produces pulse signal and by changing pulsewidth duty
Than regulation current signal to adjust the brightness of LED light source module 101, current limiting device 106 is limited pulse width modulation module 105
Stream, first protection device 107 carry out overcurrent protection to the current limiting device 106.
In the utility model embodiment, rectification module 102 is used to carry out rectification to the alternating current that AC network 100 provides
After export to energy storage filtration module 103.Specifically, the alternating current that rectification module 102 provides according to AC network 100 controls internal
Device periodicity turn-on and turn-off, the direct current conversion to alternating current is realized with this.
In the utility model embodiment, energy storage filtration module 103 is used to carry out energy storage filtering to the alternating current after rectification
Direct current is exported afterwards to current stabilization module 104.Specifically, alternating current is converted to direct current, energy storage filtration module 103 after over commutation
Energy storage is carried out to the direct current of input, while removes in current signal specific band frequency to prevent from disturbing, and will after filtering
Direct current electricity output afterwards is to current stabilization module 104.
In the utility model embodiment, current stabilization module 104 is used to after carrying out current stabilization filtering to the direct current of input export
Current signal driving LED light source module 101 works.Specifically, when DC supply input current stabilization module 104, current stabilization module 104 is controlled
Current stabilization device inside system carries out current stabilization control to the direct current of input, meanwhile, also include energy storage device in current stabilization module 104
And filtering device, for carrying out energy storage to direct current, while specific band frequency is removed in current signal to prevent from disturbing, and will
Current signal after after filtering is exported to drive LED light source module 101 to work.
In the utility model embodiment, pulse width modulation module 105 produces pulse signal and by changing pulse duty cycle
Current signal is adjusted to adjust the brightness of LED light source module 101.Specifically, when LED drive circuit works, pulsewidth modulation mould
Block 105 produces the current signal that pulse signal detects the output of current stabilization module 104 simultaneously, when detecting current signal and predetermined threshold value
When different, then by adjusting pulsewidth dutycycle to control the size of the current signal of the output of current stabilization module 104, so that LED light
The power of source module 101 and brightness are adjusted.Wherein, predetermined threshold value is set according to actual conditions.
The regulation of the current signal exported based on pulse width modulation module 105 to current stabilization module 104 so that in AC and CCG two
When kind state is changed mutually, the various parameters of two states can be kept consistent, which thereby enhance the compatible and reliable of LED
Property, while be advantageous to improve LED service life.
In the utility model embodiment, current limiting device 106 is used to carry out pulse width modulation module 105 current limliting, and first protects
Shield device 107 is used for the normal work for protecting current limiting device 106.Change pulse duty cycle regulation electricity in pulse width modulation module 105
During flowing signal, pulse width modulation module 105 may cause overcurrent damage due to fluctuating widely for current signal, therefore
Need to carry out current limliting to the electric current of pulse width modulation module 105 by current limiting device 106, when current is excessive, electric current is guided into and connect
Ground terminal is to reduce current value.Similarly, current limiting device 106 may also face during current limliting comes not because immediate current is excessive
And guide earth terminal into and cause the situation of overcurrent damage, and access the first protection device 107 at the both ends of current limiting device 106 can be with
The occurrence of preventing 106 overcurrent damage of current limiting device, thus formed with current limiting device 106 to the double of pulse width modulation module 105
Protect again.
The LED drive circuit that the utility model embodiment provides, pulse duty cycle is changed by pulse width modulation module and adjusted
Current signal is to adjust the brightness of LED light source module, so as to improve LED AC and CCG compatibility and input linear regulation；Together
When, current limliting is carried out to pulse width modulation module by current limiting device, the first protection device carries out overcurrent protection to current limiting device, so as to
Ensure the normal work of drive circuit, improve LED reliability and service life.
On the basis of framework shown in Fig. 1, Fig. 2 shows the another of the LED drive circuit that the utility model embodiment provides
One modular structure, for convenience of description, the part related to the utility model embodiment is illustrate only, details are as follows：
A kind of LED drive circuit, AC network 100 and LED light source module 101 are connected, LED drive circuit includes：It is whole
Flow module 102, energy storage filtration module 103, current stabilization module 104, pulse width modulation module 105, current limiting device 106 and first are protected
Device 107；Also include the second protection device 108.
Wherein, rectification module 102, energy storage filtration module 103, current stabilization module 104, pulse width modulation module 105, current limiting device
106 and first protection device 107 refer to associated description in an embodiment, do not repeat herein.
In the utility model embodiment, the first end connection AC network 100 of the second protection device 108, the second protection
The first input end of the second end connection rectification module 102 of device 108；When the second protection device 108 detects LED drive circuit
During excessively stream, the second protection device 108 disconnects so that LED drive circuit is stopped, and ensures that LED drive circuit and LED
The respectively safety of work component, while double shield is constituted with the first protection device 107 in light source module.
Fig. 3 (corresponding diagram 1) and Fig. 4 (corresponding diagram 2) shows the tool for the LED drive circuit that the utility model embodiment provides
Body circuit structure, for convenience of description, the part related to the utility model embodiment is illustrate only, details are as follows：
As shown in Figure 3 and Figure 4, rectification module 102 includes：First diode D1, the second diode D2, the 3rd diode D3
And the 4th diode D4.
First diode D1 positive pole and the 4th diode D4 negative pole connect the first input for forming rectification module 102 altogether
End, the first diode D1 negative pole and the second diode D2 negative pole connect the output end for forming rectification module 102, the two or two pole altogether
Pipe D2 positive pole and the 3rd diode D3 negative pole connect the second input for forming rectification module 102 altogether, the 3rd diode D3's
Positive pole and the 4th diode D4 positive pole are connected to ground altogether.
In the utility model embodiment, the first diode D1, the second diode D2, the 3rd diode D3 and the four or two
Pole pipe D4 is periodically turned on and ended, be achieved in alternating current in the presence of the alternating current that AC network 100 provides
Direct current is changed, and by the direct current electricity output after rectification to energy storage filtration module 103.
As shown in Figure 3 and Figure 4, energy storage filtration module 103 includes：First inductance L1, first resistor R1, the first electric capacity C1 with
And the second electric capacity C2.
The first end of first inductance L1 first end, first resistor R1 first end and the first electric capacity C1 connects composition storage altogether
Can filtration module 103 first end, the first inductance L1 the second end, the of first resistor R1 the second end and the second electric capacity C2
One end connects the second end for forming energy storage filtration module 103 altogether, and the first electric capacity C1 the second end and the second electric capacity C2 the second end are total to
It is connected to ground.
In the utility model embodiment, by the first inductance L1, first resistor R1, the first electric capacity C1 and the second electric capacity C2
The energy storage filtration module 103 of composition exports direct current to current stabilization module 104 after energy storage filtering is carried out to the direct current of input.Its
In, the first inductance L1 is used to carry out the direct current that rectification module 102 inputs energy storage, and the first electric capacity C1 and the second electric capacity C2 are used
It is filtered in the direct current inputted to rectification module 102.
As shown in Figure 3 and Figure 4, current stabilization module 104 includes：5th diode D5, the 3rd electric capacity C3, second resistance R2 and
Transformer primary side T1.
It is steady that 5th diode D5 negative pole, the 3rd electric capacity C3 first end and second resistance R2 first end connects composition altogether
The input of flow module 104, the 5th diode D5 negative pole, the 3rd electric capacity C3 first end and second resistance R2 first end
The first output end for forming current stabilization module 104 is connect altogether, and the 5th diode D5 positive pole and transformer primary side T1 first end connect altogether
Form the controlled end of current stabilization module 104, the 3rd electric capacity C3 the second end, second resistance R2 the second end and transformer primary side T1
The second end connect the second output end for forming current stabilization module 104 altogether.
In the utility model embodiment, by the 5th diode D5, the 3rd electric capacity C3, second resistance R2 and transformer primary
The current stabilization module 104 of side T1 compositions is mainly used in driving output current signal after carrying out current stabilization filtering to the direct current of input
LED light source module 101 works.Wherein, the 5th diode D5 is used to carry out afterflow to the direct current of input, and the 3rd electric capacity C3 is used for
The direct current of input is filtered, transformer primary side T1 is used to carry out energy storage to the direct current of input.
As shown in Figure 3 and Figure 4, pulse width modulation module 105 includes：Pulse width modulator U1 and the 4th electric capacity C4.Wherein, pulsewidth
Modulator U1 can be specifically model JW1795 PWM chip.
Pulse width modulator U1 control terminal DRAIN be pulse width modulation module 105 control terminal, pulse width modulator U1 power supply
The electric capacity C4 of VDD connections the 4th first end is held, pulse width modulator U1 earth terminal GND is the earth terminal of pulse width modulation module 105
(when pulse width modulator U1 selects model JW1795 PWM chip, the earth terminal of pulse width modulation module 105 is by the PWM
Four GND ends of modulation chip connect composition altogether), the 4th electric capacity C4 the second end ground connection.
In the utility model embodiment, when LED drive circuit works, pulse width modulator U1 produces pulse signal simultaneously
The current signal of the output of current stabilization module 104 is detected, when detecting current signal with predetermined threshold value difference, then with reference to compensating electric capacity
4th electric capacity C4 by adjusting pulsewidth dutycycle with control current stabilization module 104 export current signal size so that LED light
The power of source module 101 and brightness are adjusted.
Regulation based on the pulse width modulator U1 current signals exported to current stabilization module 104 so that in two kinds of shapes of AC and CCG
When state is changed mutually, the various parameters of two states can be kept consistent, which thereby enhance LED compatibility and reliability, together
When be advantageous to improve LED service life.
As shown in Figure 3 and Figure 4, current limiting device 106 is 3rd resistor R3, and 3rd resistor R3 first end is current limiting device
106 first end, 3rd resistor R3 the second end are the second end of current limiting device 106.
In the utility model embodiment, 3rd resistor R3 is used to carry out current limliting to the electric current of pulse width modulation module 105, when
When electric current is excessive, electric current is guided into earth terminal to reduce current value.
As shown in Figure 3 and Figure 4, the first protection device 107 is the 6th diode D6, just extremely the first of the 6th diode D6
The first end of protection device 107, the 6th diode D6 negative pole are the second end of the first protection device 107.
In the utility model embodiment, the 6th diode D6 is used to carry out overcurrent protection to current limiting device 106.
As shown in figure 4, the second protection device 108 is fuse F1, fuse F1 first end is the second protection device 108
First end, fuse F1 the second end is the second end of the second protection device 108.
In the utility model embodiment, when fuse F1 detects LED drive circuit excessively stream, fuse F1 disconnect with
LED drive circuit is stopped, ensure that the respectively safety of work component, while protected with first in LED drive circuit
Shield device 107 constitutes double shield.
In the above-described embodiments, LED light source module can be specifically to include LED, Inductive ballast and fuse F0 (figures
Not shown in) LED lamp tube.Wherein, because the fuse current specification of existing LED lamp tube is generally bigger, generally 1A/
250V, nonserviceable silk of insuring of driving power is difficult to fuse rapidly, and Inductive ballast can send very big noise, and can
Can be when Inductive ballast generate heat and burns out LED, fuse can just play a protective role, and such LED has scrapped, Inductive ballast
Also there is the risk burnt out, therefore, the present embodiment fuse F0 is the fuse compared with small dimension.Preferably, fuse F0 is
One kind in 160mA/250V, 250mA/250V, 315mA/250V.In the selection of specification, carried out according to the length of LED lamp tube
Choose, specifically, when LED length of tube is 0.6m, the fuse of 160mA/250V specifications can be selected；When LED pipe range
Spend for 1.2m when, can select 250mA/250V specifications fuse；When LED length of tube is 1.5m, can select
The fuse of 315mA/250V specifications.
The LED drive circuit that the utility model embodiment provides, pulse duty cycle is changed by pulse width modulator U1 and adjusted
Current signal is to adjust the brightness of LED light source module, so as to improve LED AC and CCG compatibility and input linear regulation；Together
When, current limliting is carried out to pulse width modulator U1 by 3rd resistor R3, excessively stream is carried out to 3rd resistor R3 by the 6th diode D6
Protection, excessively stream guarantor is carried out to LED drive circuit and LED light source module by the fuse F1 and less fuse F0 of specification respectively
Shield, so as to ensure that the normal work of drive circuit and LED light source module under triple protection, improve LED reliability and make
Use the life-span.
In view of above-mentioned LED drive circuit has the advantages of reliability and service life for improving LED, the utility model is implemented
Example additionally provides a kind of LED light emission device, and LED light emission device includes LED light source module and LED drive circuit as described above.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (10)
1. a kind of LED drive circuit, connect AC network and LED light source module, it is characterised in that the LED drive circuit
Including：
Rectification module, energy storage filtration module, current stabilization module, pulse width modulation module, current limiting device and the first protection device；
The first input end of the rectification module and the second input connect the AC network, the output end of the rectification module
The first end of the energy storage filtration module is connected, the second end of the energy storage filtration module connects the input of the current stabilization module
End, the first output end of the current stabilization module are connected to the first input end of the LED light source module altogether, and the of the current stabilization module
Two output ends connect the second input of the LED light source module, and the controlled end of the current stabilization module connects the pulsewidth modulation
The control terminal of module, the earth terminal of the pulse width modulation module, the first end of the current limiting device and first protector
The first end of part connects altogether, and the second end of the second end of the current limiting device and first protection device is connected to ground altogether；
The alternating current that the rectification module is provided the AC network is exported to the energy storage filtration module, institute after carrying out rectification
State after energy storage filtration module carries out energy storage filtering to the alternating current after rectification and export direct current to the current stabilization module, the current stabilization
Output current signal drives the LED light source module to work after module carries out current stabilization filtering to the direct current of input；
When the LED light source module works, the pulse width modulation module produces pulse signal and by changing pulse duty cycle
The current signal is adjusted to adjust the brightness of the LED light source module, the current limiting device enters to the pulse width modulation module
Row current limliting, first protection device carry out overcurrent protection to the current limiting device.
2. LED drive circuit according to claim 1, it is characterised in that the rectification module includes：
First diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4；
The positive pole of the first diode D1 and the negative pole of the 4th diode D4 connect altogether forms the first of the rectification module
Input, the negative pole of the first diode D1 and the second diode D2 negative pole connect altogether forms the defeated of the rectification module
Go out end, the positive pole of the second diode D2 and the negative pole of the 3rd diode D3 connect altogether forms the second of the rectification module
Input, the positive pole of the 3rd diode D3 and the positive pole of the 4th diode D4 are connected to ground altogether.
3. LED drive circuit according to claim 1, it is characterised in that the energy storage filtration module includes：
First inductance L1, first resistor R1, the first electric capacity C1 and the second electric capacity C2；
The first end of the first end of the first inductance L1, the first end of the first resistor R1 and the first electric capacity C1 is total to
Connect the first end for forming the energy storage filtration module, the second end, the second end of the first resistor R1 of the first inductance L1
And the first end of the second electric capacity C2 connects the second end for forming the energy storage filtration module altogether, the of the first electric capacity C1
Two ends and the second end of the second electric capacity C2 are connected to ground altogether.
4. LED drive circuit according to claim 1, it is characterised in that the current stabilization module includes：
5th diode D5, the 3rd electric capacity C3, second resistance R2 and transformer primary side T1；
Negative pole, the first end of the 3rd electric capacity C3 and the first end of the second resistance R2 of the 5th diode D5 is total to
Connect the input for forming the current stabilization module, the negative pole of the 5th diode D5, the first end of the 3rd electric capacity C3 and
The first end of the second resistance R2 connects the first output end for forming the current stabilization module, the positive pole of the 5th diode D5 altogether
Connect the controlled end for forming the current stabilization module altogether with the first end of the transformer primary side T1, the second of the 3rd electric capacity C3
End, the second end of the second resistance R2 and the transformer primary side T1 the second end connect altogether forms the of the current stabilization module
Two output ends.
5. LED drive circuit according to claim 1, it is characterised in that the pulse width modulation module includes：
Pulse width modulator U1 and the 4th electric capacity C4；
The control terminal of the pulse width modulator U1 be the pulse width modulation module control terminal, the power supply of the pulse width modulator U1
End connects the first end of the 4th electric capacity C4, and the earth terminal of the pulse width modulator U1 is the ground connection of the pulse width modulation module
End, the second end ground connection of the 4th electric capacity C4.
6. LED drive circuit according to claim 1, it is characterised in that the current limiting device is 3rd resistor R3, described
3rd resistor R3 first end is the first end of the current limiting device, and the second end of the 3rd resistor R3 is the current limiting device
The second end.
7. LED drive circuit according to claim 1, it is characterised in that first protection device is the 6th diode
The first end of D6, the 6th diode D6 just extremely described first protection device, the negative pole of the 6th diode D6 are
Second end of first protection device.
8. LED drive circuit according to claim 1, it is characterised in that the LED drive circuit also includes the second protection
Device, the first end of second protection device connect the AC network, the second end connection institute of second protection device
State the first input end of rectification module；When second protection device detects the LED drive circuit excessively stream, described second
Protection device is disconnected so that the LED drive circuit is stopped.
9. LED drive circuit according to claim 1, it is characterised in that the LED light source module includes fuse F0,
The specification of the fuse F0 is one kind in 160mA/250V, 250mA/250V, 315mA/250V.
10. a kind of LED light emission device, including LED light source module, it is characterised in that the LED light emission device also includes such as right
It is required that the LED drive circuit described in 1~9 any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504119.1U CN206759775U (en) | 2017-05-05 | 2017-05-05 | A kind of LED drive circuit and LED light emission device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504119.1U CN206759775U (en) | 2017-05-05 | 2017-05-05 | A kind of LED drive circuit and LED light emission device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107969053A (en) * | 2017-12-28 | 2018-04-27 | 广州爱易学智能信息科技有限公司 | Classroom blackboard LED light strip drive circuit with current-limiting protection |
| CN108449837A (en) * | 2018-04-13 | 2018-08-24 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuits |
| CN110708791A (en) * | 2019-10-17 | 2020-01-17 | 深圳市豪恩智能物联股份有限公司 | Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107969053A (en) * | 2017-12-28 | 2018-04-27 | 广州爱易学智能信息科技有限公司 | Classroom blackboard LED light strip drive circuit with current-limiting protection |
| CN108449837A (en) * | 2018-04-13 | 2018-08-24 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuits |
| CN108449837B (en) * | 2018-04-13 | 2019-08-23 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuit |
| WO2019196695A1 (en) * | 2018-04-13 | 2019-10-17 | 深圳市崧盛电子股份有限公司 | Led dimming control circuit |
| CN110708791A (en) * | 2019-10-17 | 2020-01-17 | 深圳市豪恩智能物联股份有限公司 | Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp |
| CN110708791B (en) * | 2019-10-17 | 2024-02-09 | 深圳市豪恩智能物联股份有限公司 | Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp |
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Address after: 518000 Longhua New District, Shenzhen, Guangdong, Da wave Street Da wave office, Tong Sheng Industrial Park Road, Horne Science Park, building A two floor, C area, middle and southern section of B District Patentee after: Shenzhen haoen intelligent joint Limited by Share Ltd Address before: 518000 Longhua New District, Shenzhen, Guangdong, Da wave Street Da wave office, Tong Sheng Industrial Park Road, Horne Science Park, building A two floor, C area, middle and southern section of B District Patentee before: SHENZHEN HORN PHOTOELECTRIC LIGHTING CO., LTD. |