CN106973467A - A kind of manual power switching module of LED control devices - Google Patents
A kind of manual power switching module of LED control devices Download PDFInfo
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- CN106973467A CN106973467A CN201710373872.6A CN201710373872A CN106973467A CN 106973467 A CN106973467 A CN 106973467A CN 201710373872 A CN201710373872 A CN 201710373872A CN 106973467 A CN106973467 A CN 106973467A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
The invention provides a kind of manual power switching module of LED control devices, the problem of current LED lamp power switching module cost is high, power output is unstable is solved.Its output end accesses LED control device modules, and it includes working power, pwm signal generating unit and the switch unit being sequentially connected；The working power is that the pwm signal generating unit and the switch unit provide working power；The pwm signal generating unit provides the pwm signal of pwm signal, output preset frequency and dutycycle for the LED control devices module；The switch unit provides different pwm signals to switch pwm signal for the LED control devices module.
Description
Technical field
The present invention relates to field of circuit control, more particularly to a kind of manual power switching module of LED control devices.
Background technology
In LED lamp, generally require to switch over power output to reach the purpose of switching LED lamp brightness, it is existing
Some power switching circuitries generally require to be selected the AC-DC control IC of matching to support according to the brightness of required LED lamp
PWM dimming functions, for example common TRAIC light modulations of existing power handover scheme, MCU controls etc. cause the holistic cost mistake of circuit
Height, and then cause LED lamp price high, market acceptance is bad；It is another to have scheme for directly switching current-limiting resistance resistance to switch
Power output, but current-limiting resistance is more sensitive, and changed power is big, and serious causes LED control devices not work, and power output is inadequate
It is stable, it is difficult to ensure the service life of LED lamp.
The content of the invention
The invention provides a kind of manual power switching module of LED control devices, solve current LED lamp power and cut
Change the mold the problem of block cost is high, power output is unstable.
To achieve the above object, technical solution of the present invention is：
A kind of manual power switching module of LED control devices, its output end access LED control device modules, it includes
Working power, pwm signal generating unit and the switch unit being sequentially connected；
The working power is that the pwm signal generating unit and the switch unit provide working power；
The pwm signal generating unit provides pwm signal for the LED control devices module, exports preset frequency and accounts for
The pwm signal of empty ratio；
The switch unit provides different pwm signals to switch pwm signal for the LED control devices module.
Further, the pwm signal generating unit includes chip U1, resistance R1, resistance R2, electric capacity C1 and electric capacity
C2；The resistance R1, the resistance R2 and the electric capacity C1 are sequentially connected in series between power vd C and ground；The chip U1's
1st pin is grounded；Accessed after 2nd pin and the connection of the 6th pin between the resistance R2 and the electric capacity C1；3rd pin and the switching are single
The input connection of member；4th pin is connected with another input of the switch unit；After 5th pin is connected with the electric capacity C2
Ground connection；7th pin is accessed between the resistance R1 and resistance R2；8th pin access power vd C.
Further, the switch unit includes switch SW1, resistance R3, resistance R4, resistance R6, resistance RH, triode Q1
And triode Q2；The base stage of the triode Q1 is connected after being connected with the resistance R3 with the 3rd pin of the chip U1, described
Triode Q1 grounded emitter, the colelctor electrode of the triode Q1 is connected with the base stage of the triode Q2；The triode
Q2 grounded emitter, access power vd C after the colelctor electrode of the triode Q2 is connected with the resistance R6；The resistance R4 mono-
End is connected with the 4th pin of the chip U1, and the other end is connected with the colelctor electrode of the triode Q1；The control of the switch SW1
End is connected with the 4th pin of the chip U1, the 1st grade of access power vd C of the switch SW1, the 2nd grade of ground connection；The resistance RH
One end be connected with the colelctor electrode of the triode Q2, the other end is connected with the LED control devices module.
Further, the switch unit includes switch SW1, resistance R3, resistance R5, resistance RL and triode Q1；
The base stage of the triode Q1 is connected after being connected with the resistance R3 with the 3rd pin of the chip U1, three pole
Pipe Q1 grounded emitter, access power vd C after the colelctor electrode of the triode Q1 is connected with the resistance R5；The resistance RL
One end be connected with the colelctor electrode of the triode Q1, the other end is connected with the LED control devices module.
Further, the working power includes transformer T1 secondary pole, diode D1 and electric capacity C3, the transformer
The T1 pin of secondary pole the 1st connected with the diode D1 after as power vd C and the resistance R1, the resistance R5, the resistance
The R6 and switch SW1 the 1st grade of connection, the pin ground connection of secondary pole the 2nd of the transformer T1, the electric capacity C3 is connected across power supply
Between VDC and ground.
Further, base chip U1 when the chip U1 is 555.
Further, the LED control devices module includes chip U2, electric bridge, electric capacity C4, electric capacity C5, transformer T2, two
Pole pipe D2, resistance R7 and metal-oxide-semiconductor N1；The resistance RH and the resistance RL access the pwm signal input of the chip U2
Pin；The pwm signal output pin of the chip U2 is connected with the grid of the metal-oxide-semiconductor N1；The grounding leg of the chip U2 with it is described
The source electrode connection of metal-oxide-semiconductor；The source electrode of the metal-oxide-semiconductor is grounded after being connected with the resistance R7；The ac input end of the electric bridge connects
Enter AC power, the first output end accesses the first pole of the transformer T2 after being connected after being connected with electric capacity C4 with the second output end
1st pin, the 2nd pin of the first pole of the transformer T2 is connected with the drain electrode of the metal-oxide-semiconductor；The pin of secondary pole the 3rd of the transformer T2
Turn into the output end LED+ of LED control device modules after being connected with diode D2；The pin of secondary pole the 4th of the transformer T2 turns into
The output end LED- of LED control device modules；The electric capacity C5 be connected across the output end LED+ and output end LED- it
Between.
Further, the chip U2 is that AC-DC controls IC.
From the above-mentioned description of this invention, compared to the prior art, the invention has the advantages that：
First, the present invention produces specific pwm signal, the different switch unit by choosing by pwm signal generating unit
Circuit selects the duty cycle range of the pwm signal of output, meanwhile, LED control devices are selected by switch on switch unit
Module is total power output or certain power output；The technology no longer needs to select different according to the demand of LED control devices
AC-DC control IC, the chips such as MCU need not be used in whole circuit so that can be realized with a low cost switching using the technology
In high-power output, and directly can increase the functional module in original single power model, simple in construction, function-stable drops simultaneously
Low production cost.
2nd, the present invention switches the technical scheme of power output without the use of directly switching current-limiting resistance resistance, overcomes
LED control devices do not work caused by the current-limiting resistance existed using current-limiting resistance is more sensitive, changed power is big, output
The problems such as power is unstable.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the structured flowchart of the present invention；
Fig. 2 is the schematic diagram of the circuit diagram of the embodiment of the present invention one；
Fig. 3 is the schematic diagram of the circuit diagram of the embodiment of the present invention two.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Referring to figs. 1 to Fig. 3, a kind of manual power switching module of LED control devices, its output end access LED control dresses
Module is put, it includes working power, pwm signal generating unit and the switch unit being sequentially connected；
The working power is that the pwm signal generating unit and the switch unit provide working power；
The working power includes transformer T1 secondary pole, diode D1 and electric capacity C3, the secondary pole of the transformer T1
1st pin connected with the diode D1 after as power vd C and the resistance R1, the resistance R5, the resistance R6 and institute
Switch SW1 the 1st grade of connection is stated, the pin ground connection of secondary pole the 2nd of the transformer T1, the electric capacity C3 is connected across power vd C and ground
Between.
Wherein transformer T1 secondary pole, diode D1, electric capacity C3, the mould is coupled as by LED control device main transformers
Block provides working power.
The pwm signal generating unit provides pwm signal for the LED control devices module, exports preset frequency and accounts for
The pwm signal of empty ratio；
The pwm signal generating unit includes chip U1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2；The resistance
R1, the resistance R2 and the electric capacity C1 are sequentially connected in series between power vd C and ground；The 1st pin ground connection of the chip U1；The
Accessed after 2 pin and the connection of the 6th pin between the resistance R2 and the electric capacity C1；One input of the 3rd pin and the switch unit
Connection；4th pin is connected with another input of the switch unit；5th pin is grounded after being connected with the electric capacity C2；7th pin connects
Enter between the resistance R1 and the resistance R2；8th pin access power vd C；Base chip U1 when the chip U1 is 555；
Resistance R1, resistance R2, electric capacity C1, electric capacity C2, chip U1 composition pwm signal generating units, are that LED control devices are carried
Exported for dutycycle for 50% ＜ D ＜ 100% pwm signal.Wherein by adjust resistance R1, resistance R2, electric capacity C1 parameters come
The pwm signal of the predetermined frequency of the pin outputs of chip U1 the 3rd and dutycycle is set, and the parameter of each component is selected with reference to following public affairs
Formula：Frequency Fsw=1.44/ ((R1+2*R2)+C1), dutycycle D=(R1+R2)/(R1+2*R2).
The LED control devices module includes chip U2, electric bridge, electric capacity C4, electric capacity C5, transformer T2, diode D2, electricity
Hinder R7 and metal-oxide-semiconductor N1；The resistance RH and the resistance RL access the pwm signal input pin of the chip U2；The core
Piece U2 pwm signal output pin is connected with the grid of the metal-oxide-semiconductor N1；The grounding leg of the chip U2 and the source of the metal-oxide-semiconductor
Pole is connected；The source electrode of the metal-oxide-semiconductor is grounded after being connected with the resistance R7；The ac input end incoming transport electricity of the electric bridge
Source, the first output end accesses the 1st pin of the first pole of the transformer T2, institute after being connected after being connected with electric capacity C4 with the second output end
The 2nd pin for stating transformer T2 first pole is connected with the drain electrode of the metal-oxide-semiconductor；The pin of secondary pole the 3rd and diode of the transformer T2
Turn into the output end LED+ of LED control device modules after D2 series connection；The pin of secondary pole the 4th of the transformer T2 turns into LED and controls dress
Put the output end LED- of module；The electric capacity C5 is connected across between the output end LED+ and the output end LED-.The core
Piece U2 is that AC-DC controls IC, its model JW1600.
In the present invention, the switch unit provides different to switch pwm signal for the LED control devices module
Pwm signal.
Embodiment one：
Reference picture 2, the switch unit includes switch SW1, resistance R3, resistance R4, resistance R6, resistance RH, triode Q1
And triode Q2；The base stage of the triode Q1 is connected after being connected with the resistance R3 with the 3rd pin of the chip U1, described
Triode Q1 grounded emitter, the colelctor electrode of the triode Q1 is connected with the base stage of the triode Q2；The triode
Q2 grounded emitter, access power vd C after the colelctor electrode of the triode Q2 is connected with the resistance R6；The resistance R4 mono-
End is connected with the 4th pin of the chip U1, and the other end is connected with the colelctor electrode of the triode Q1；The control of the switch SW1
End is connected with the 4th pin of the chip U1, the 1st grade of access power vd C of the switch SW1, the 2nd grade of ground connection；The resistance RH
One end be connected with the colelctor electrode of the triode Q2, the other end is connected with the LED control devices module.
When switch SW1 pushes 1 gear：
The pin of chip U1 Enable Pins the 4th is height, and chip U1 starts working, and the 3rd pin output preset frequency and dutycycle are (predetermined to account for
The value of empty ratio is between 50%-100%) pwm signal and be input to switch unit；
When pwm signal (pwm signal that the i.e. LED control devices unit is received) dutycycle for needing switch unit to export exists
It is reverse twice by resistance R3, resistance R4, resistance R6, resistance RH, triode Q1, triode Q2 when 50%-100% is interval, together
When by power vd C pass through resistance R6 provide PWM cut-in voltages；LED control device module chips U2 (AC-DC contrl IC)
The pwm signal that pwm signal input pin receives switch unit output realizes adjustment LED control device power.
When switch SW1 pushes 2 gear：
The pin of chip U1 Enable Pins the 4th is low, and chip U1 does not work, and the 3rd pin is low.
When pwm signal (pwm signal that the i.e. LED control devices unit is received) dutycycle for setting switch unit to export exists
When 50%-100% is interval, resistance R4 is grounded by switching SW1, and triode Q2 is closed, and power vd C makes switching by resistance R6
The pwm signal of unit output is normal high；LED control device module chips U2 (AC-DC contrl IC) pwm signal input pin is
Chang Gao, realizes that LED control devices total power is exported.
Embodiment two：
Reference picture 3, the present embodiment and embodiment one are essentially identical, and its difference is：The switch unit includes opening
Close SW1, resistance R3, resistance R5, resistance RL and triode Q1；The base stage of the triode Q1 connected with the resistance R3 after with
The 3rd pin connection of the chip U1, the grounded emitter of the triode Q1, colelctor electrode and the resistance of the triode Q1
Access power vd C after R5 series connection；One end of the resistance RL is connected with the colelctor electrode of the triode Q1, the other end with it is described
LED control devices module is connected.
When switch SW1 pushes 1 gear：
The pin of chip U1 Enable Pins the 4th is height, and chip U1 starts working, and the 3rd pin output preset frequency and dutycycle are (predetermined to account for
The value of empty ratio is between 50%-100%) pwm signal and be input to switch unit；
When pwm signal (pwm signal that the i.e. LED control devices unit is received) dutycycle for needing switch unit to export exists
It is once reverse by resistance R3, resistance R5, resistance RL and triode Q1 when 0%-50% is interval, while being passed through by power vd C
Resistance R5 provides PWM cut-in voltages；LED control device module chips U2 (AC-DC contrl IC) pwm signal input pin is received
The pwm signal of switch unit output realizes adjustment LED control device power.
When switch SW1 pushes 2 gear：
The pin of chip U1 Enable Pins the 4th is low, and chip U1 does not work, and the 3rd pin is low.
When pwm signal (pwm signal that the i.e. LED control devices unit is received) dutycycle for setting switch unit to export exists
When 0%-50% is interval, triode Q1 is closed, and power vd C is by resistance R5, and the pwm signal for exporting switch unit is normal high；
LED control device module chips U2 (AC-DC contrl IC) pwm signal input pin is normal high, realizes the full work(of LED control devices
Rate is exported.
There is above-mentioned technical proposal to understand, the present invention produces specific pwm signal by pwm signal generating unit, pass through choosing
The duty cycle range for the pwm signal for taking different switch unit circuits to select output；Meanwhile, pass through the switch on switch unit
Selection LED control device modules are total power output or certain power output；The technology is no longer needed according to LED control devices
Demand select that in different AC-DC controls IC, whole circuit the chips such as MCU need not be used so that can be with using the technology
High-power output in switching is realized with a low cost, and directly can increase the functional module in original single power model, it is simple in construction,
Function-stable, while reducing production cost.
Meanwhile, the present invention switches the technical scheme of power output without the use of directly switching current-limiting resistance resistance, overcomes
The current-limiting resistance existed using current-limiting resistance is more sensitive, changed power it is big caused by LED control devices do not work, output
Power it is unstable the problems such as.
The preferred embodiments of the present invention have shown and described in described above, as previously described, it should be understood that not office of the invention
Be limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and
Environment, and can be changed in invention contemplated scope described herein by the technology or knowledge of above-mentioned teaching or association area
It is dynamic., then all should be appended by the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In scope of the claims.
Claims (8)
1. a kind of manual power switching module of LED control devices, its output end access LED control device modules, its feature exists
In：It includes working power, pwm signal generating unit and the switch unit being sequentially connected；
The working power is that the pwm signal generating unit and the switch unit provide working power；
The pwm signal generating unit provides pwm signal, output preset frequency and dutycycle for the LED control devices module
Pwm signal；
The switch unit provides different pwm signals to switch pwm signal for the LED control devices module.
2. a kind of manual power switching module of LED control devices as claimed in claim 1, it is characterised in that：The PWM letters
Number generating unit includes chip U1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2；The resistance R1, the resistance R2 and
The electric capacity C1 is sequentially connected in series between power vd C and ground；The 1st pin ground connection of the chip U1；After 2nd pin is connected with the 6th pin
Access between the resistance R2 and the electric capacity C1；3rd pin is connected with an input of the switch unit；4th pin with it is described
Another input connection of switch unit；5th pin is grounded after being connected with the electric capacity C2；7th pin accesses the resistance R1 and institute
State between resistance R2；8th pin access power vd C.
3. a kind of manual power switching module of LED control devices as claimed in claim 2, it is characterised in that：The switching
Unit includes switch SW1, resistance R3, resistance R4, resistance R6, resistance RH, triode Q1 and triode Q2；The triode Q1
Base stage and the resistance R3 series connection after be connected with the 3rd pin of the chip U1, the grounded emitter of the triode Q1 is described
Triode Q1 colelctor electrode is connected with the base stage of the triode Q2；The grounded emitter of the triode Q2, the triode
Access power vd C after Q2 colelctor electrode is connected with the resistance R6；Described resistance R4 one end and the 4th pin of the chip U1 connect
Connect, the other end is connected with the colelctor electrode of the triode Q1；The control end of the switch SW1 connects with the 4th pin of the chip U1
Connect, the 1st grade of access power vd C of the switch SW1, the 2nd grade of ground connection；One end of the resistance RH and the collection of the triode Q2
Electrode is connected, and the other end is connected with the LED control devices module.
4. a kind of manual power switching module of LED control devices as claimed in claim 2, it is characterised in that：The switching
Unit includes switch SW1, resistance R3, resistance R5, resistance RL and triode Q1；
The base stage of the triode Q1 is connected after being connected with the resistance R3 with the 3rd pin of the chip U1, the triode Q1
Grounded emitter, access power vd C after the colelctor electrode of the triode Q1 is connected with the resistance R5；The one of the resistance RL
End is connected with the colelctor electrode of the triode Q1, and the other end is connected with the LED control devices module.
5. a kind of manual power switching module of LED control devices as described in claim 3 or 4, it is characterised in that：The work
Make secondary pole of the power supply including transformer T1, diode D1 and electric capacity C3, the transformer T1 pin of secondary pole the 1st and two pole
The 1st grade of the power vd C and resistance R1, the resistance R5, the resistance R6 and the switch SW1 is used as after pipe D1 series connection
Connection, the pin ground connection of secondary pole the 2nd of the transformer T1, the electric capacity C3 is connected across between power vd C and ground.
6. a kind of manual power switching module of LED control devices as claimed in claim 5, it is characterised in that：The chip
Base chip U1 when U1 is 555.
7. a kind of manual power switching module of LED control devices as claimed in claim 6, it is characterised in that：The LED controls
Apparatus module processed includes chip U2, electric bridge, electric capacity C4, electric capacity C5, transformer T2, diode D2, resistance R7 and metal-oxide-semiconductor N1；
The resistance RH and the resistance RL access the pwm signal input pin of the chip U2；The pwm signal output of the chip U2
Pin is connected with the grid of the metal-oxide-semiconductor N1；The grounding leg of the chip U2 is connected with the source electrode of the metal-oxide-semiconductor；The metal-oxide-semiconductor
Source electrode is grounded after being connected with the resistance R7；The ac input end incoming transport power supply of the electric bridge, the first output end and electric capacity
The 1st pin of the first pole of the transformer T2 is accessed after being connected after C4 series connection with the second output end, the first pole of the transformer T2
2nd pin is connected with the drain electrode of the metal-oxide-semiconductor；The pin of secondary pole the 3rd of the transformer T2 turns into LED controls after being connected with diode D2
The output end LED+ of apparatus module；The pin of secondary pole the 4th of the transformer T2 turns into the output end LED- of LED control device modules；
The electric capacity C5 is connected across between the output end LED+ and the output end LED-.
8. a kind of manual power switching module of LED control devices as claimed in claim 7, it is characterised in that：The chip
U2 is that AC-DC controls IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373872.6A CN106973467B (en) | 2017-05-24 | 2017-05-24 | A kind of manual power switching module of LED control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373872.6A CN106973467B (en) | 2017-05-24 | 2017-05-24 | A kind of manual power switching module of LED control device |
Publications (2)
| Publication Number | Publication Date |
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| CN106973467A true CN106973467A (en) | 2017-07-21 |
| CN106973467B CN106973467B (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710373872.6A Expired - Fee Related CN106973467B (en) | 2017-05-24 | 2017-05-24 | A kind of manual power switching module of LED control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659907A (en) * | 2018-12-24 | 2019-04-19 | 惠州市蓝微电子有限公司 | A kind of lithium battery short-circuit detection protection method |
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| CN104113972A (en) * | 2014-08-11 | 2014-10-22 | 上海亚明照明有限公司 | LED power supply switching circuit |
| US20150277469A1 (en) * | 2014-03-28 | 2015-10-01 | Pass & Seymour, Inc. | Power control device with calibration features |
| CN207011035U (en) * | 2017-05-24 | 2018-02-13 | 厦门益光照明科技股份有限公司 | A kind of manual power switching module of LED control devices |
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2017
- 2017-05-24 CN CN201710373872.6A patent/CN106973467B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427635A (en) * | 2011-09-15 | 2012-04-25 | 中国船舶重工集团公司第七○七研究所 | Accurate LED (light-emitting diode) dimming device and method on basis of PWM (Pulse Width Modulation) |
| CN102869160A (en) * | 2012-09-12 | 2013-01-09 | 中达电通股份有限公司 | Constant-current dimming control device of LED (Light Emitting Diode) lamp |
| CN203167332U (en) * | 2012-10-09 | 2013-08-28 | 惠州学院 | Visual self-adaptive light adjustable energy-saving LED lamp |
| US20150277469A1 (en) * | 2014-03-28 | 2015-10-01 | Pass & Seymour, Inc. | Power control device with calibration features |
| CN104113972A (en) * | 2014-08-11 | 2014-10-22 | 上海亚明照明有限公司 | LED power supply switching circuit |
| CN207011035U (en) * | 2017-05-24 | 2018-02-13 | 厦门益光照明科技股份有限公司 | A kind of manual power switching module of LED control devices |
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| CN109659907A (en) * | 2018-12-24 | 2019-04-19 | 惠州市蓝微电子有限公司 | A kind of lithium battery short-circuit detection protection method |
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| Publication number | Publication date |
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| CN106973467B (en) | 2019-01-25 |
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