CN104812141B - Switch smooth light modulation LED power supply power controller - Google Patents
Switch smooth light modulation LED power supply power controller Download PDFInfo
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- CN104812141B CN104812141B CN201510237869.2A CN201510237869A CN104812141B CN 104812141 B CN104812141 B CN 104812141B CN 201510237869 A CN201510237869 A CN 201510237869A CN 104812141 B CN104812141 B CN 104812141B
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- circuit
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- power supply
- chip microcomputer
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Abstract
The invention discloses one kind to switch smooth light modulation LED power supply power controller; change protection circuit, single-chip microcomputer power supply circuit, pwm control circuit, sample circuit, single chip machine controlling circuit, output current sample circuit, comparison circuit and photoelectric coupling circuit including EMI filter circuit, rectification circuit, isolating transformer, current rectifying and wave filtering circuit, hunting power factor; compared with prior art; drive scheme of the present invention is to pass through secondary side feedback; without light modulator so being influenceed in the absence of light modulator to caused by power network, electromagnetic radiation can be crossed；Having saved light modulator not consider light modulator wiring issue；10% 100% smooth light modulations are realized by reference point of the time in the situation of no light modulator, are handled by information of switching signal；And belong to a kind of DC DC adjusting power modes.It is easy to use, there is the value of popularization and application.
Description
Technical field
The present invention relates to a kind of LED control circuit, more particularly to a kind of smooth light modulation LED power supply power controller of switch.
Background technology
Light emitting diode is referred to as LED.It is made up of the compound containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N) etc..Work as electricity
Son with that can give off visible ray during hole-recombination can be used for that light emitting diode is made.It is used as and refers in circuit and instrument
Show lamp, or composition word or numerical monitor.Gallium arsenide diode glows, gallium phosphide diode green light, the pole of carborundum two
Pipe Yellow light-emitting low temperature, gallium nitride diode blue light-emitting.Because chemical property divides Organic Light Emitting Diode OLED and inorganic light-emitting diode again
LED。
It is exactly that the sine wave of alternating current is reached to cut to change its virtual value that major part, which uses controllable silicon, at present
Purpose.Load is connected with reverse-blocking tetrode thyristor.The intrinsic standoff ratio can for changing variable resistor changes its angle of flow, so as to realize
Change the purpose of its virtual value.Usual one switch of this potentiometer band, n input is connected on, for switch lamp.Thyristor regulating
The shortcomings that light and problem, however, controllable silicon light modulation has a series of problems：
1. controllable silicon destroys the waveform of sine wave, so as to reduce power factor (PF) value, usual PF is less than 0.5, and leads
Current flow angle more hour power factor (PF) is poorer (there was only 0.25 during 1/4 brightness)；
2. non-sinusoidal waveform increases harmonic constant；
3. non-sinusoidal waveform can produce serious interference signal (EMI) on the line；
4. being easy in low-load unstable, a bleeder resistor must also be added for this, and this bleeder resistor is extremely
1-2 watts of power is consumed less；
5. the problem of unexpected can be also produced in the driving power of common controllable silicon light modulation circuit output to LED, that
It is exactly that the LC wave filters of input can make controllable silicon produce vibration, this vibration is indifferent for incandescent lamp, because incandescent
The thermal inertia of lamp make it that human eye does not see this vibration at all, but for LED driving power will produce audio-frequency noise and
Flicker.
The content of the invention
The purpose of the present invention is that to solve the above problems and provides a kind of smooth light modulation LED power supply power control of switch
Device processed.
The present invention is achieved through the following technical solutions above-mentioned purpose：
The present invention includes EMI filter circuit, rectification circuit, isolating transformer, current rectifying and wave filtering circuit, hunting power factor and changed
Become protection circuit, single-chip microcomputer power supply circuit, pwm control circuit, sample circuit, single chip machine controlling circuit, output current sampling electricity
Road, comparison circuit and photoelectric coupling circuit, the input of the EMI filter circuit is the smooth light modulation LED power supply work(of switch
The input of rate controller, the output end of the EMI filter circuit are connected with the input of the rectification circuit, the rectified current
The output end on road improves the of protection circuit with the first input end of the isolating transformer and the hunting power factor simultaneously
One input connects, the output end of the isolating transformer while the input with the current rectifying and wave filtering circuit and the single-chip microcomputer
The first input end connection of power supply circuit, the output end of the current rectifying and wave filtering circuit are simultaneously defeated with the single-chip microcomputer power supply circuit
Enter end and connect and be used as with the input of the sample circuit described to switch the first defeated of smooth light modulation LED power supply power controller
Go out end, the output end of the single-chip microcomputer power supply circuit is connected with the first input end of the single chip machine controlling circuit, the sampling
The output end of circuit is connected with the second input of the single chip machine controlling circuit, and the first of the output current sample circuit is defeated
Go out first output end of the end for the smooth light modulation LED power supply power controller of switch, the second of the output sampling circuit is defeated
The output end for going out end and the single chip machine controlling circuit is connected with the input of the comparison circuit simultaneously, the comparison circuit
Output end is connected with the input of the photoelectric coupling circuit, the output end of the photoelectric coupling circuit and PWM control electricity
The input connection on road, the output end of the pwm control circuit improve the of protection circuit with the hunting power factor respectively
Two inputs connect with the second input of the isolating transformer.
The beneficial effects of the present invention are：
The present invention is a kind of smooth light modulation LED power supply power controller of switch, compared with prior art, driving side of the invention
Case has with advantage：
1st, drive scheme be by secondary side feedback, without light modulator so being influenceed to caused by power network in the absence of light modulator,
Electromagnetic radiation can be crossed；
2nd, having saved light modulator not consider light modulator wiring issue；
3rd, the situation of no light modulator realizes that 10%-100% is smoothly dimmed using the time as reference point, using switching signal as letter
Breath is handled；
4th, a kind of DC-DC adjusting powers mode is belonged to.
Brief description of the drawings
Fig. 1 is the circuit structure theory diagram of the present invention；
Fig. 2 is the circuit structure diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1：The present invention includes EMI filter circuit, rectification circuit, isolating transformer, current rectifying and wave filtering circuit, vibration
Power factor (PF) changes protection circuit, single-chip microcomputer power supply circuit, pwm control circuit, sample circuit, single chip machine controlling circuit, output
Current sampling circuit, comparison circuit and photoelectric coupling circuit, the input of EMI filter circuit is the smooth light modulation LED power supply of switch
The input of power controller, the output end of EMI filter circuit and the input of rectification circuit connect, the output end of rectification circuit
The first input end for improving protection circuit with the first input end and hunting power factor of isolating transformer simultaneously is connected, and isolation becomes
The output end of depressor is connected with the input of current rectifying and wave filtering circuit and the first input end of single-chip microcomputer power supply circuit simultaneously, rectification filter
The output end of wave circuit is connected with the input of single-chip microcomputer power supply circuit and the input of sample circuit and is used as switch flat simultaneously
First output end of sliding light modulation LED power supply power controller, the output end of single-chip microcomputer power supply circuit and single chip machine controlling circuit
First input end connects, and the output end of sample circuit and the second input of single chip machine controlling circuit connect, output current sampling
First output end of circuit is switchs the first output end of smooth light modulation LED power supply power controller, and the of output sampling circuit
Two output ends and the output end of single chip machine controlling circuit be connecteds with the input of comparison circuit simultaneously, the output end of comparison circuit and
The input connection of photoelectric coupling circuit, the output end of photoelectric coupling circuit and the input of pwm control circuit connect, PWM controls
The output end of circuit processed improve respectively with hunting power factor protection circuit the second input and isolating transformer it is second defeated
Enter end connection.
Change of the invention by sampling secondary output voltage, detection secondary voltage trailing edge is with rising, into interruption；The
PWM pins output low level when once starting shooting, output current is maximum, such as wants to adjust output current, shutdown is required in 180S again
Secondary opening, into the dutycycle of PWM shaping modes, under this scheme PWM, when being varied down to minimum value gradually after gradually become greater to again
Diminish again during maximum, export PWM this whens through external circuit R50 and electric capacity C22, form linear voltage, this linear voltage
Value it is directly proportional to PWM duty, output current is adjusted by comparator ic358, PWM dutycycle is with output current into just
Than control PWM duty cycle is changed over time and changed, and after being transferred to required electric current, just fixed electric current before being powered off is opened in shutdown again
State, wherein single-chip microcomputer VCC power supply circuits are provided by two-way, are output all the way, the big retention time length of this capacitance, are available for monolithic
Machine enters sleep state after shut-off, and this state maintains the state of register, and another way is secondary side assists winding power supply electricity
Road this when being start to allow single-chip microcomputer to enter work in advance, lamp dodges during anti-start, and its single-chip microcomputer enters sleep and wake-up, by interrupting
Voltage sample circuit current potential on single-chip microcomputer pin is faster than the potential change on single-chip microcomputer power supply, single when the power is turned off
Piece machine Vcc allows single-chip microcomputer also working, and sample circuit has trailing edge signal and gone over, and such single-chip microcomputer is put into sleep, to
Reduce single-chip microcomputer power come extend single-chip microcomputer power supply road on electric capacity current potential retention time, upon power-up sample road have rising
Come along signal, at this moment single-chip microcomputer is waken up into subsequent work pattern.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. one kind switchs smooth light modulation LED power supply power controller, it is characterised in that：Including EMI filter circuit, rectification circuit,
Isolating transformer, current rectifying and wave filtering circuit, hunting power factor change protection circuit, single-chip microcomputer power supply circuit, pwm control circuit,
Sample circuit, single chip machine controlling circuit, output current sample circuit, comparison circuit and photoelectric coupling circuit；
The input of the EMI filter circuit is the input for switching smooth light modulation LED power supply power controller, described
The output end of EMI filter circuit is connected with the input of the rectification circuit, the output end of the rectification circuit simultaneously with it is described
The first input end that the first input end of isolating transformer improves protection circuit with the hunting power factor connects；
The output end of the isolating transformer while the input with the current rectifying and wave filtering circuit and the single-chip microcomputer power supply circuit
First input end connection；
The output end of the current rectifying and wave filtering circuit simultaneously with the input of the single-chip microcomputer power supply circuit and the sample circuit
Input connects and is used as the first output end of the smooth light modulation LED power supply power controller of switch；
The output end of the single-chip microcomputer power supply circuit is connected with the first input end of the single chip machine controlling circuit, the sampling electricity
The output end on road is connected with the second input of the single chip machine controlling circuit；
The first input end of the output current sample circuit is the first of the smooth light modulation LED power supply power controller of switch
Output end；
Second output end of the output current sample circuit and the output end of the single chip machine controlling circuit simultaneously with the ratio
Input compared with circuit is connected, and the output end of the comparison circuit is connected with the input of the photoelectric coupling circuit, the light
The output end of electric coupling circuit is connected with the input of the pwm control circuit, the output end of the pwm control circuit respectively with
The second input that the hunting power factor improves protection circuit connects with the second input of the isolating transformer；
The working method of the LED power power controller is as follows：
By sampling the change of secondary output voltage, detection secondary voltage is down or up, into interruption；When starting shooting for the first time
PWM pins export low level, and output current is maximum, such as want to adjust output current, shutdown is required to be again turned in 180S, entered
The dutycycle of PWM shaping modes, under this scheme PWM, when being varied down to minimum value gradually after when gradually becomeing greater to maximum not only but also
Diminish, export PWM this whens through external circuit R50 and electric capacity C22, formation linear voltage, the value of this linear voltage and PWM's
Duty is directly proportional, and output current is adjusted by comparator ic358, and PWM dutycycle is directly proportional to output current, and control PWM is accounted for
Empty ratio is changed over time and changed, and after being transferred to required electric current, just fixed current status before being powered off, wherein monolithic are opened in shutdown again
Machine VCC power supply circuits are provided by two-way, are output all the way, the big retention time length of this capacitance, are available for single-chip microcomputer to enter after shut-off
Enter sleep state, this state maintains the state of register, another way be secondary side assists winding power supply circuit this when being start
To allow single-chip microcomputer to enter work in advance, lamp dodges during anti-start, and its single-chip microcomputer enters sleep and waken up, by interrupt voltage sample circuit
Current potential is faster than the potential change on single-chip microcomputer power supply on single-chip microcomputer pin, and single-chip microcomputer Vcc allows list when the power is turned off
Piece machine is also working, and sample circuit has trailing edge signal and gone over, and such single-chip microcomputer is put into sleep, to reduce single-chip microcomputer
Power extends the retention time of electric capacity current potential on single-chip microcomputer power supply road, samples road upon power-up and has rising edge signal and come,
At this moment single-chip microcomputer is waken up into subsequent work pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237869.2A CN104812141B (en) | 2015-05-11 | 2015-05-11 | Switch smooth light modulation LED power supply power controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237869.2A CN104812141B (en) | 2015-05-11 | 2015-05-11 | Switch smooth light modulation LED power supply power controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104812141A CN104812141A (en) | 2015-07-29 |
| CN104812141B true CN104812141B (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510237869.2A Expired - Fee Related CN104812141B (en) | 2015-05-11 | 2015-05-11 | Switch smooth light modulation LED power supply power controller |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862654B (en) * | 2018-09-26 | 2020-12-11 | 江西通利晟电子科技有限公司 | Isolated LED driving circuit and driving method thereof |
| CN111447717A (en) * | 2020-04-28 | 2020-07-24 | 佛山市正跃照明科技有限公司 | Infrared light and color adjusting RGB drive circuit device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201947510U (en) * | 2011-01-21 | 2011-08-24 | 南京吉山光电科技有限公司 | Power-adjustable light emitting diode (LED) constant current source |
| CN103167686A (en) * | 2012-10-25 | 2013-06-19 | 主力电器（贵阳）有限公司 | Compatible type drive scheme used by light-emitting diode (LED) lighting lamp |
| CN103442504A (en) * | 2013-09-18 | 2013-12-11 | 湘潭大学 | LED (Light Emitting Diode) constant current driving circuit based on PWM (Pulse-Width Modulation) light-adjusting mode |
| CN203942687U (en) * | 2014-07-03 | 2014-11-12 | 苏州鸿益丰光电有限公司 | A kind of isolated form constant-current dimming circuit |
| CN104159367A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | LED light modulator based on PAM and PWM and dimming method of LED light modulator based on PAM and PWM |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070138971A1 (en) * | 2005-08-15 | 2007-06-21 | Liang Chen | AC-to-DC voltage converter as power supply for lamp |
-
2015
- 2015-05-11 CN CN201510237869.2A patent/CN104812141B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201947510U (en) * | 2011-01-21 | 2011-08-24 | 南京吉山光电科技有限公司 | Power-adjustable light emitting diode (LED) constant current source |
| CN103167686A (en) * | 2012-10-25 | 2013-06-19 | 主力电器（贵阳）有限公司 | Compatible type drive scheme used by light-emitting diode (LED) lighting lamp |
| CN103442504A (en) * | 2013-09-18 | 2013-12-11 | 湘潭大学 | LED (Light Emitting Diode) constant current driving circuit based on PWM (Pulse-Width Modulation) light-adjusting mode |
| CN203942687U (en) * | 2014-07-03 | 2014-11-12 | 苏州鸿益丰光电有限公司 | A kind of isolated form constant-current dimming circuit |
| CN104159367A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | LED light modulator based on PAM and PWM and dimming method of LED light modulator based on PAM and PWM |
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| CN104812141A (en) | 2015-07-29 |
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| CB02 | Change of applicant information | ||
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Address after: 518103 Shenzhen City, Shenzhen, Guangdong Province, Baoan District Fuyong Street West Ring Road West, Chongqing road to South Dazu laser Fuyong Industrial Park on the two floor Applicant after: Shenzhen Dazu Visual Technology Co., Ltd. Address before: 518103 Shenzhen City, Shenzhen, Guangdong Province, Baoan District Fuyong Street West Ring Road West, Chongqing road to South Dazu laser Fuyong Industrial Park on the two floor Applicant before: Lighting Co., Ltd of big nation of Shenzhen |
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Granted publication date: 20180227 Termination date: 20180511 |