CN104254170A - Dimmer - Google Patents
Dimmer Download PDFInfo
- Publication number
- CN104254170A CN104254170A CN201310287453.2A CN201310287453A CN104254170A CN 104254170 A CN104254170 A CN 104254170A CN 201310287453 A CN201310287453 A CN 201310287453A CN 104254170 A CN104254170 A CN 104254170A
- Authority
- CN
- China
- Prior art keywords
- circuit module
- dimmer
- module
- resistance
- signal input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007493 shaping process Methods 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 9
- 230000003071 parasitic effect Effects 0.000 claims description 9
- 230000005669 field effect Effects 0.000 claims description 8
- 230000002141 anti-parasite Effects 0.000 claims description 6
- 239000003096 antiparasitic agent Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 abstract description 26
- 238000012360 testing method Methods 0.000 abstract description 7
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 3
- 150000004706 metal oxides Chemical class 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 230000007704 transition Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A dimmer comprises a power source module and a switch circuit module electrically connected with the power source module. The switch circuit module comprises at least one MOS (metal oxide semiconductor) tube and an intelligent driving circuit module electrically connected between the power source module and the switch circuit module, and the intelligent driving circuit module comprises a negative temperature coefficient thermosensitive resistor, a first resistor and a second resistor. The negative temperature coefficient thermosensitive resistor is arranged, and output resistance of the intelligent driving circuit module is decreased when temperature of the MOS tubes is increased or increased when temperature of the MOS tubes is decreased, so that input driving power is improved when switch converting speed of the MOS tubes is too slow, input driving power is lowered when switch converting speed of the MOS tubes is too high, the input driving power reaches a balance value finally, and the switch converting speed of the MOS tubes also reaches a balance value which enables the dimmer to pass EMC tests and reach temperature requirements.
Description
Technical field
The present invention relates to a kind of power-supply device, particularly a kind of dimmer being applicable to high-power small size.
Background technology
In general daily life, all can see various lighting apparatus everywhere, such as, fluorescent lamp, street lamp, desk lamp, artistic lamp etc.In above-mentioned lighting apparatus, major part is as illuminating source with osram lamp traditionally.In recent years, because science and technology is maked rapid progress, utilized light-emitting diode (LED) as light sources.Notably, except lighting apparatus, for general traffic sign, billboard, car light etc., also all change into and use light-emitting diode as illuminating source.As previously mentioned, use light-emitting diode as illuminating source, its benefit is power saving, and brightness is larger, therefore generalization gradually in use.
Along with popularizing of LED lamp, increasing occasion brings into use LED lamp, and for LED lamp, due to its DC low-voltage feature, is necessary for it and is equipped with the DC power supply adapted.Meanwhile, along with the raising of people's living standard and requirement, people no longer meet the LED lamp of single brightness or color, and therefore, dimmer arises at the historic moment.But in order to the power adapting to LED increases, the power output of dimmer is also increasing, but in order to attractive in appearance with assembling, volume but requires more and more less.But, when the power of dimmer becomes greatly, there will be two problems, one is that heating can increase considerably, namely the heating of metal-oxide-semiconductor switch can increase considerably, and two is that electromagnetic interference also can increase substantially, and these factors constrain the design and fabrication of high-power small size dimmer.
Summary of the invention
In view of this, be necessary to provide a kind of dimmer being applicable to high-power small size, to meet the demand.
A kind of dimmer comprises a power module, a switching circuit module be electrically connected with this power supply, an intelligent drive circuit module be electrically connected between described power module and switching circuit module.Described switching circuit module comprises at least one mos field effect transistor.This intelligent drive circuit module comprises a negative tempperature coefficient thermistor, and the first resistance that one in parallel with this negative temperature coefficient heat-sensitive.
Compared with prior art, due to the existence of described negative tempperature coefficient thermistor, the output resistance of described intelligent drive circuit module reduces along with the temperature rising of described mos field effect transistor or temperature reduces and raises, thus the input queued switches power of described mos field effect transistor can be changed, and then make when the switch transition speed of described mos field effect transistor is too fast, reduce input queued switches power, and switch transition speed too slow time, improve input queued switches power, finally this input queued switches power arrives an equilibrium valve, the switch transition speed of described mos field effect transistor also arrives an equilibrium valve, this equilibrium valve makes described dimmer not only can reach the requirement of temperature by EMC test.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the invention are described, wherein:
Fig. 1 is the circuit block diagram of a kind of dimmer provided by the invention.
Fig. 2 is the circuit theory diagrams of the dimmer of Fig. 1.
Embodiment
Based on accompanying drawing, specific embodiments of the invention are further elaborated below.Should be appreciated that specific embodiment described herein is only as embodiment, the protection range be not intended to limit the present invention.
Refer to Fig. 1 and Fig. 2, it is circuit block diagram and the circuit theory diagrams of a kind of dimmer 100 provided by the present invention.Described dimmer 100 comprises a power module 10, a shaping circuit module 11 be electrically connected with this power module 10, an intelligent drive circuit module 12 be electrically connected with this shaping circuit module 11, a switching circuit module 13 be electrically connected with this intelligent drive circuit module 12, load 14, one be electrically connected with this switching circuit module 13 is electrically connected with described shaping circuit module 11 and provides the signal input module 15 of control signal for this shaping circuit module 11.
Described load 14 can be LED lamp, or other light fixtures adapted, and in the present embodiment, described load is LED lamp.
Described power module 10 provides constant voltage source.It is understood, however, that for this power module 10 provides the power supply of electric power can for the alternating current such as civil power, generating set, the direct currents etc. such as storage battery, it sets as required.Can find out that this power module 10 utilizes two diodes D1, D2 from the circuit theory diagrams of Fig. 2, and an electric capacity C1 carries out filtering to its input power and goes to peak, to export the constant voltage source that applicable described dimmer 100 uses.
Described shaping circuit module 11 comprises three triodes Q1, Q2, Q3, and two resistance R3, R4, circuit diagram as shown in Figure 2.When the drive singal of the output of described signal input module 15 is low level, described triode Q1, Q2 will end, and this shaping circuit module 11 is in cut-off state, and load 14 i.e. LED lamp no current does not work.When the output drive signal of described signal input module 15 is high level, described triode Q1, Q2 are by conducting, and this shaping circuit module 11 is in conducting state, and load 14 is started working.Described triode Q1, Q2, Q3 except be used as signal input switch also control signal input time length.Conducting and the cut-off of described triode Q1, Q2 need the Phase synchronization with the input current of power module 10, thus can be controlled the size of the power output of this dimmer 100 by the length of the ON time of control Q1, Q2, and then can realize light modulation.
Described signal input module 15 can be the unit that single-chip microcomputer or CPU etc. have data processing function, it is programmed according to the requirement of user, sampling, data processing or the manual input according to user, export the power output of the load 14 required for user as changed the means such as the size of resistance.The signal that described signal input module 15 exports is control signal, namely controls the size of the power output of this dimmer 100.But there is pressure reduction between the power supply signal that the control signal exported due to this signal input module 15 and power module 10 export, therefore need a spacer assembly to isolate, signal input isolation circuit module 16 namely as described below.
Described dimmer 100 comprises a signal input isolation circuit module 16 be electrically connected between described signal input module 15 and shaping circuit module 11, for the power supply signal of the control signal and power module 10 of isolating described signal input module 15, namely isolate the earth terminal of the earth terminal of the control signal of described signal input module 15 and the power supply signal of power module 10.Because there is voltage difference between the earth terminal of described control signal and the earth terminal of power supply signal, if these two earth terminal conductings, described signal input module 15 or damage power module 10 or will be damaged.This signal input isolation circuit module 16 comprises an optocoupler N1 in order to realize above requirement, the electronic devices and components of optocoupler N1 known by those skilled in the art, then this repeats no more.
Described intelligent drive circuit module 12 comprises a negative tempperature coefficient thermistor NTC1, a first resistance R6 in parallel with this negative tempperature coefficient thermistor NTC1, and a second resistance R7 connected with described negative tempperature coefficient thermistor NTC1 and the first resistance R6.Described negative tempperature coefficient thermistor NTC1 (NTC:Negative Temperature Coefficient) is with metal oxides such as manganese, cobalt, nickel and copper for main material, the manufacture of employing ceramic process.These metal oxide materials all have semiconductor property because on electrically conducting manner the semi-conducting material such as all fours germanium, silicon.This negative tempperature coefficient thermistor NTC is exactly when its temperature is low, charge carrier (electronics and the hole) number of these oxide materials is few, so its resistance value is higher, but along with the rising of temperature, charge carrier number increases, so a kind of resistance that resistance value can reduce.Described first, second resistance R6, R7 are a constant resistance, namely have a constant resistance.Instant resistance by the first resistance R6 and negative tempperature coefficient thermistor NTC1 determines by the output resistance of described intelligent drive circuit module 12.Because the first resistance R6 and negative tempperature coefficient thermistor NTC1 is arranged in parallel, therefore the output resistance of described intelligent drive circuit module 12 changes between the resistance and the minimum resistance of negative tempperature coefficient thermistor NTC1 of the first resistance R6.
Described switching circuit module 13 comprises two mos field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor is called for short metal-oxide-semiconductor) Q4, Q5.These two metal-oxide-semiconductors Q4, Q5 are respectively used to the input of Switching Power Supply signal and the output of dimmer 100.Described metal-oxide-semiconductor Q4, Q5 are the main pyrotoxins of dimmer 100, are also the main occurring source that electromagnetic interference produces.The caloric value of metal-oxide-semiconductor Q4, Q5 causes primarily of switching loss, if metal-oxide-semiconductor Q4, Q5 switch transition speed is too fast, it will produce very large electromagnetic wave, therefore cause the conducted interference of dimmer 100 can be very large, emc testing EMC (Electro Magnetic Compatibility) cannot be passed through, therefore cannot do the power of large described dimmer 100.And if metal-oxide-semiconductor Q4, Q5 switch transition speed is too slow, although very large electromagnetic wave can not be produced, emc testing EMC can be well solved, but the caloric value caused by the switching loss of this metal-oxide-semiconductor Q4, Q5 will be very large, therefore in order to dispel the heat, the volume that must increase dimmer 100 is beneficial to heat radiation, and this is unfavorable for again the volume reducing dimmer, and therefore these reasons become the reason that dimmer of the prior art cannot realize high-power small size.Also, therefore when metal-oxide-semiconductor Q4, Q5 switch transition speed is too fast, wishing can be slow by adjustment, and to be tested by EMC, and when metal-oxide-semiconductor Q4, Q5 switch transition speed is too slow, wishing can be quicker by adjustment, to reduce its caloric value.And the effect of described intelligent drive circuit module 16 is just this, described negative tempperature coefficient thermistor NTC1 is sticked on metal-oxide-semiconductor Q4 or Q5, as metal-oxide-semiconductor Q4 or Q5 variations in temperature, the instant resistance of this negative tempperature coefficient thermistor NTC also will change, namely when temperature raises, resistance reduces, and temperature reduces, then resistance raises.When the switch transition speed of metal-oxide-semiconductor Q4, Q5 is too fast, the temperature of metal-oxide-semiconductor Q4, Q5 reduces, the instant resistance of negative tempperature coefficient thermistor NTC1 will increase, the output resistance of described intelligent drive circuit module 16 is by the total resistance close to the first resistance R6 and the second resistance R7, thus reduce the output driving power of shaping circuit module 11, and then the switch transition speed of metal-oxide-semiconductor Q4, Q5 will be reduced, thus reduce electromagnetic interference.And when the switch transition speed of metal-oxide-semiconductor Q4, Q5 is too slow, the temperature of metal-oxide-semiconductor Q4, Q5 raises, the instant resistance of negative tempperature coefficient thermistor NTC1 will reduce, the output resistance of described intelligent drive circuit module 16 is by close to the instant resistance of negative tempperature coefficient thermistor NTC1 and total resistance of the second resistance R7, thus improve the output driving power of described shaping circuit module 11, and then improve the switch transition speed of metal-oxide-semiconductor Q4, Q5, the caloric value of metal-oxide-semiconductor Q4, Q5 is reduced.Therefore by the parameter of design described first resistance R6, negative tempperature coefficient thermistor NTC1 and the second resistance R7, the switch transition speed of described metal-oxide-semiconductor Q4, Q5 can be made to reach one and not only can reach the equilibrium valve of temperature requirement by EMC test, and without the need to considering the parameter of signal input module 15.When described metal-oxide-semiconductor Q4, Q5 reach described equilibrium valve, the input queued switches power of described shaping circuit module also arrives an equilibrium valve, and this equilibrium valve makes described dimmer 100 not only can reach the requirement of temperature by EMC test.It is understood, however, that the standard of described EMC test and the requirement of temperature are as required as use occasion, the size of the power output of dimmer 100, and the volume size of this dimmer 100 etc. is because of what usually set, namely it can change as required.
Described dimmer 100 also comprises an overload protection sample circuit module 17; this overload protection sample circuit module 17 is arranged between described switching circuit module 13 and signal input module 15; for when load 14 electric current is greater than certain value; close this dimmer 100 to protect this dimmer 100 not damaged, or output feedback signal more suitably exports to allow the instant change of signal input module 15 to described signal input module 15.Described overload protection sample circuit module 17 comprises two resistance R9, R10 and an optocoupler N2.Described two resistance R9, R10 are used for overcurrent protection sampling and use; namely when load 14 electric current is greater than certain default value; voltage then on two resistance R9, R10 exceedes this preset value; this voltage by electric circuit inspection to after can carry out subsequent action; as closed drive singal or change drive singal; to realize overload protection or short-circuit protection, make this dimmer 100 not damaged.Equally, the effect of described optocoupler N2 is also buffer action, is namely used for isolating the earth terminal of described signal input module 15 and the earth terminal of this overload protection sample circuit module 17, burns each electronic component to avoid its conducting.
Described dimmer 100 also comprises an antiparasitic circuit 18 be electrically connected between described switching circuit module 13 and load 14.Parasitic oscillation refers to the vibration of non-operating frequency.Common parasitic oscillation has two kinds, namely lower than the motorboating of operating frequency and the high-frequency parasiticoscillation higher than operating frequency.The generation of parasitic oscillation, the distributed constant due to the element such as metal-oxide-semiconductor interelectrode capacitance, lead-in inductance and lead-in wire, choke, capacitor constitutes oscillating circuit and produces.Parasitic oscillation, as got rid of not in time, can cause burning oscillating tube.Therefore need to load this antiparasitic circuit 18.In the present embodiment, described antiparasitic circuit 18 is electrically connected at the input of described switching circuit module 13, and comprise an inductance L 1, for the parasitic oscillation described in choke suppress caused by switching circuit module 13 to reduce temperature and the shield electromagnetic interference of this switching circuit module 13, it utilizes the electromagnetic induction principle of inductance to absorb parasitic oscillation energy on the one hand, destroy the phase relation of parasitic oscillation feedback on the other hand, thus suppress parasitic oscillation to occur.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all do in the spirit and principles in the present invention any amendment, equivalent to replace and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a dimmer, it comprises a power module, and a switching circuit module be electrically connected with this power module, described switching circuit module comprises at least one mos field effect transistor, it is characterized in that: described dimmer also comprises an intelligent drive circuit module be electrically connected between described power module and switching circuit module, this intelligent drive circuit module comprises a negative tempperature coefficient thermistor, first resistance in parallel with this negative temperature coefficient heat-sensitive.
2. dimmer as claimed in claim 1, is characterized in that: described power module provides constant voltage source.
3. dimmer as claimed in claim 1, it is characterized in that: described dimmer also comprises a shaping circuit module, this shaping circuit module is electrically connected between described power module and intelligent drive circuit module to carry out filter shape to the out-put supply signal of described power module.
4. dimmer as claimed in claim 3, is characterized in that: described shaping circuit module comprises at least one triode, and this triode is used as the switch of signal input and the time length of control signal input.
5. dimmer as claimed in claim 1, it is characterized in that: described dimmer also comprises a signal input isolation circuit module, and a signal input module being electrically connected at the input of described signal input isolation circuit module, described signal input module is used for for described dimmer input drive signal is to control the output of this dimmer, and described signal input isolation circuit module is for the power supply signal of the control signal and power module of isolating described signal input module.
6. dimmer as claimed in claim 1, is characterized in that: described intelligent drive circuit module also comprises second resistance, and this second resistance and described negative tempperature coefficient thermistor and the first resistant series are arranged.
7. dimmer as claimed in claim 1, is characterized in that: described first resistance has a constant resistance.
8. dimmer as claimed in claim 1; it is characterized in that: described dimmer also comprises an overload protection sample circuit module; this overload protection sample circuit module is used for when load current is greater than certain value, closes this dimmer to protect this dimmer not damaged.
9. dimmer as claimed in claim 1, it is characterized in that: described dimmer also comprises an antiparasitic circuit module, described antiparasitic circuit module is used for parasitic oscillation described in choke suppress caused by switching circuit module to reduce temperature and the shield electromagnetic interference of this switching circuit module.
10. dimmer as claimed in claim 9, is characterized in that: described antiparasitic circuit module is electrically connected at the input of described switching circuit module, and comprises an inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310287453.2A CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310287453.2A CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104254170A true CN104254170A (en) | 2014-12-31 |
| CN104254170B CN104254170B (en) | 2017-01-18 |
Family
ID=52188598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310287453.2A Active CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104254170B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803729A (en) * | 2015-11-26 | 2017-06-06 | 国家电网公司 | Self-shield direct current motor drive circuit and direct current drive twist grinding machine |
| CN106982492A (en) * | 2017-04-19 | 2017-07-25 | 赛尔富电子有限公司 | A kind of light modulator with overload protecting circuit |
| CN109039030A (en) * | 2018-09-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Control circuit and method for improving temperature rise of power switch and electric cooker |
| CN111465141A (en) * | 2020-04-09 | 2020-07-28 | 深圳市时誉高精科技有限公司 | Alternating-current multi-path mutual-control dimmer |
| CN112332648A (en) * | 2020-11-13 | 2021-02-05 | 山特电子（深圳）有限公司 | Device and method for actively balancing thermal performance of parallel power devices |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101427611A (en) * | 2006-04-10 | 2009-05-06 | 路创电子公司 | Load control device having a variable drive circuit |
| CN103052213A (en) * | 2012-11-30 | 2013-04-17 | 无锡中铂电子有限公司 | Circuit structure for controlling temperature rise of LED (Light-Emitting Diode) |
-
2013
- 2013-06-29 CN CN201310287453.2A patent/CN104254170B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101427611A (en) * | 2006-04-10 | 2009-05-06 | 路创电子公司 | Load control device having a variable drive circuit |
| CN103052213A (en) * | 2012-11-30 | 2013-04-17 | 无锡中铂电子有限公司 | Circuit structure for controlling temperature rise of LED (Light-Emitting Diode) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803729A (en) * | 2015-11-26 | 2017-06-06 | 国家电网公司 | Self-shield direct current motor drive circuit and direct current drive twist grinding machine |
| CN106982492A (en) * | 2017-04-19 | 2017-07-25 | 赛尔富电子有限公司 | A kind of light modulator with overload protecting circuit |
| CN106982492B (en) * | 2017-04-19 | 2023-10-31 | 赛尔富电子有限公司 | Dimmer with overload protection circuit |
| CN109039030A (en) * | 2018-09-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Control circuit and method for improving temperature rise of power switch and electric cooker |
| CN111465141A (en) * | 2020-04-09 | 2020-07-28 | 深圳市时誉高精科技有限公司 | Alternating-current multi-path mutual-control dimmer |
| CN112332648A (en) * | 2020-11-13 | 2021-02-05 | 山特电子（深圳）有限公司 | Device and method for actively balancing thermal performance of parallel power devices |
| CN112332648B (en) * | 2020-11-13 | 2022-09-27 | 山特电子（深圳）有限公司 | Device and method for actively balancing thermal performance of parallel power devices |
| US11923766B2 (en) | 2020-11-13 | 2024-03-05 | Santak Electronic (Shenzhen) Co., Ltd. | Apparatus and approach to actively balance thermal performance of paralleled devices |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104254170B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203340342U (en) | Led drive circuit | |
| CN104254170A (en) | Dimmer | |
| CN205830106U (en) | A kind of constant-current LED driving chip | |
| CN106982493B (en) | A kind of under-voltage protecting circuit for LED lamp | |
| CN104427700B (en) | Overheating protection circuit, LED drive circuit and lamps and lanterns | |
| CN205179009U (en) | Monopole electronic switch of single live wire switch relay drive module and applied this module | |
| TW201301951A (en) | Dimmer system and damper circuit thereof | |
| CN202135377U (en) | A control circuit of a drive power supply capable of adjusting an LED light source, and a control module thereof | |
| CN204465995U (en) | For the driving power of large-power light-emitting diodes | |
| CN204392656U (en) | LED drive circuit and LED switch driving power | |
| CN207399569U (en) | A kind of LED light modulations toning circuit | |
| CN203757403U (en) | LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect | |
| CN206024154U (en) | LED light modulating devices and LED drive power | |
| CN109302777B (en) | LED dimming device and dimming system | |
| CN104470095B (en) | Ripple rejection LED drive circuit | |
| CN203407040U (en) | Light modulator | |
| CN105140997A (en) | Intelligent lamp charger of intelligent traffic system | |
| CN203761623U (en) | Self-adaptive LED fluorescent tube and self-adaptive LED AC drive circuit | |
| CN104053288B (en) | The non-isolated voltage-dropping type LED drive circuit of adaptation power supply | |
| CN103298223A (en) | Step-down piezoelectric transformer driving light-emitting technology method of LED (Light Emitting Diode) and OLED (Organic Light Emitting Diode) | |
| CN203757402U (en) | LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect | |
| CN204707313U (en) | A kind of LED protection circuit | |
| CN204967343U (en) | Intelligent transportation system's intelligent lamps and lanterns charger | |
| CN104093234A (en) | Dimming control system for large-power LED lamp | |
| CN106937437B (en) | It is a kind of for exchange input ON-OFF control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161123 Address after: 315103 Ningbo national high tech Zone, Zhejiang, No. 1345 Applicant after: SELF ELECTRONICS CO., LTD. Address before: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Ningbo Purcell Electronics Ltd. Applicant before: Lin Wanjiong |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |