CN203015236U - A LED driving power supply - Google Patents
A LED driving power supply Download PDFInfo
- Publication number
- CN203015236U CN203015236U CN2013200195227U CN201320019522U CN203015236U CN 203015236 U CN203015236 U CN 203015236U CN 2013200195227 U CN2013200195227 U CN 2013200195227U CN 201320019522 U CN201320019522 U CN 201320019522U CN 203015236 U CN203015236 U CN 203015236U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- voltage
- input
- led driving
- 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.)
- Expired - Fee Related
Links
Images
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
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to the LED manufacturing field and provides a LED driving power supply. The LED driving power supply comprises a power input end, an EMC circuit, a rectifying circuit, a voltage converting circuit, a filtering circuit, an output current voltage detecting circuit, and an output end LED lamp which are connected successively. A constant-current and constant-voltage control circuit is also included and is connected with the output end of the output current voltage detecting circuit and the input end of the voltage converting circuit. An inductor is connected between the rectifying circuit and the voltage converting circuit in series. A piezoresistor is connected between the rectifying circuit and the voltage converting circuit in parallel. The input end of the piezoresistor is connected with the output end of the inductor. The LED driving power supply greatly decreases the number of elements with large sizes, high failure rates, and high prices and has characteristics of a simple structure, reducing cost, and stable and reliable use. The inductor is applied between the rectifying circuit and the voltage converting circuit so that bad influence caused by a differential mode signal conducted to a power grid is suppressed. In addition, the applied piezoresistor increases an external surge suppressing capability of the power supply.
Description
Technical field
The utility model relates to LED and makes the field, more specifically, relates to a kind of simple and reasonablely, and cost uses reliable and stable LED driving power.
Background technology
LED, light-emitting diode is a kind of semiconductor subassembly that can convert electrical energy into luminous energy, has that volume is little, power consumption is low, a long service life, the advantage such as environmental and durable, is widely used in the fields such as lighting, display screen, traffic signal lamp.
Be the semiconductor device of characteristic sensitivity due to LED, have again negative temperature characteristic, thereby need it is carried out steady-working state and protection in application process, thereby need the LED driving power.LED near harshness, unlike common incandescent lamp bulb, can directly connect the electric main of 220V to the requirement of driving power.LED is the low voltage drive of 2～3V, must design complicated translation circuit.At present, when Choice and design LED driving power, need to consider from high reliability, high efficiency, High Power Factor, surge protection, useful life, the aspect such as adaptive.
In prior art, as shown in Figure 1, traditional high-power LED driving power source inputs to the LED light fixture of EMC circuit, rectification circuit, pfc circuit, voltage conversion circuit, filter circuit, output current voltage detecting circuit and output successively by the AC power supplies supplying power for input end.Also be provided with simultaneously constant-current and constant-voltage control circuit, comprise amplifying driving and drive circuit, exported successively to the input of amplification driving, drive circuit, voltage conversion circuit by the output of output current voltage detecting circuit, drive for LED provides constant current constant voltage.Wherein pfc circuit also forms the loop together with DC power supply, power control circuit.
This traditional high-power LED driving power source is comparatively complicated, the some of them element has the shortcoming that volume is large, power is large, cost is high, failure rate is high, such as powerful metal-oxide-semiconductor, high frequency transformer, recovery diode, electrochemical capacitor etc., make whole circuit energy consumption larger, inefficiency, holistic cost is high simultaneously, lacks the reliability that uses.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of simple and reasonable, increases work efficiency, and cost uses reliable and stable LED driving power.
the technical scheme that its technical problem that solves the utility model adopts is: a kind of LED driving power, comprise the power input that connects successively, the EMC circuit, rectification circuit, voltage conversion circuit, filter circuit, the LED light fixture of output current voltage detecting circuit and output, also comprise simultaneously constant-current and constant-voltage control circuit, being connected input with voltage conversion circuit with the output of output current voltage detecting circuit respectively is connected, connect between described rectification circuit and described voltage conversion circuit an inductance and piezo-resistance in parallel, the input of piezo-resistance is connected with the output of inductance.
LED driving power of the present utility model is powered by power input, input to successively the LED light fixture of EMC circuit, rectification circuit, voltage conversion circuit, filter circuit, output current voltage detecting circuit and output, wherein the EMC circuit suppresses external electromagnetic interference signal; Rectification circuit is converted to direct current energy to the AC energy of power supply input; Voltage conversion circuit is converted to high voltage direct current required low-voltage dc signal; The filter circuit alternating component in low-voltage dc signal that reduces as much as possible to pulse keeps flip-flop, reduces the ripple coefficient of output voltage, makes waveform become smoother; The output current voltage detecting circuit detects and feeds back to voltage conversion circuit by constant-current and constant-voltage control circuit the current and voltage signals of output, drives for LED provides constant current constant voltage.
Compare with traditional high-power LED driving power source, the utility model has been cancelled pfc circuit, thereby do not need to use powerful metal-oxide-semiconductor and high frequency transformer in pfc circuit, cancelled simultaneously high-power, high back-pressure, fast recovery diode D2 and large volume, large capacity, high withstand voltage electrochemical capacitor C20 between pfc circuit and voltage conversion circuit in Fig. 1.Said elements is the element that power is large, volume is large, failure rate is high, price is high, and the utility model has significantly reduced these elements, thereby simple and reasonable, can effectively increase work efficiency, and cost, working stability is reliable.In addition, increased inductance between rectification circuit and voltage conversion circuit, suppressed because difference mode signal is transmitted to the harmful effect that causes on electrical network.Owing to having cancelled high withstand voltage electrochemical capacitor C20, increased piezo-resistance between rectification circuit and voltage conversion circuit simultaneously, as the compensation of the inhibition ability that improves power supply surge to external world.
In one embodiment, described constant-current and constant-voltage control circuit comprises that amplification drives, power factor control circuit, amplifying the input that drives is connected with the output of output current voltage detecting circuit, amplify the output that drives and be connected with the input of power factor control circuit, the output of power factor control circuit is connected with the input of voltage conversion circuit.Amplify the current and voltage signals that drives output and generate corresponding control signal after amplifying Treatment Analysis, be delivered to power factor control circuit, power factor control circuit is processed by analysis and is indicated, and index signal is fed back to voltage conversion circuit, realizes the control of constant current and constant voltage.Compare with traditional high-power LED drive circuit, cancelled drive circuit, further simplified overall structure.
In one embodiment; be connected with overvoltage crowbar between described rectification circuit and power factor control circuit; the input of overvoltage crowbar is connected with the output of rectification circuit, and the output of overvoltage crowbar is connected with the input of power factor control circuit.During higher than certain numerical value, overvoltage crowbar is delivered to power factor control circuit with signal, controls and cuts off voltage conversion circuit when the voltage of rectification circuit; When voltage returned to normal range (NR), overvoltage crowbar was delivered to power factor control circuit with signal again, controlled the turn-on voltage translation circuit.
In one embodiment, the input of described amplification driving is connected with thermal-shutdown circuit.When the excess Temperature of LED light fixture; thermal-shutdown circuit is delivered to signal to amplify and drives; then controlled the output current of mandatory down low-voltage translation circuit by power factor control circuit, avoid the LED light fixture to cause damage because of excess Temperature, further improve the reliability that uses.
In one embodiment, the input of described amplification driving is connected with the output short-circuit open loop protection circuit.When short circuit being detected, automatic shutdown circuit is realized the effective protection of self, and is sent warning, prevents from endangering further expansion, resets through after the several seconds, if be still short circuit, again cuts off circuit, constantly patrols ring, until fault is got rid of.
In a preferred implementation, the model of described power factor control circuit is L6561, can very accurately adjust overvoltage output, have minimum starting current and low-down operating current, it is the upgraded version of the power factor corrector of L6560 specification, has how superior performance, tolerable is operated in very wide effective input voltage range (from 85V to 265V), starting current is compressed to is low to moderate tens of microampere and is provided with disabler, lower with the current loss of guaranteeing standby mode.
The utility model takes full advantage of the premium properties of power factor L6561: it has the current over-zero measuring ability, not only effectively avoided the adverse consequences of transformer due to saturated generation, reduce simultaneously the switching loss of metal-oxide-semiconductor, greatly improve the conversion efficiency of whole power circuit; It passes through the pulsed dc voltage after the detection rectification, automatically adjusts output frequency and duty ratio, improves conversion efficiency and the power factor of circuit; It has the overcurrent protection function of metal-oxide-semiconductor, and when the electric current of metal-oxide-semiconductor reached certain value, moment was turn-offed metal-oxide-semiconductor, effectively protects metal-oxide-semiconductor, makes reliablely, increases the service life.
The beneficial effects of the utility model are: the utility model has significantly reduced the element that volume is large, failure rate is high, price is high, and is simple and reasonable, can effectively increase work efficiency, and cost.Power factor can up to more than PF=0.95, meet the category-A standard of national street lighting.Increased inductance between rectification circuit and voltage conversion circuit, resisted because difference mode signal is transmitted to the harmful effect that causes on electrical network.Also increase simultaneously piezo-resistance between rectification circuit and voltage conversion circuit, improved the inhibition ability of power supply surge to external world.In addition, increase overvoltage crowbar and thermal-shutdown circuit, further improved the reliability that uses.
Description of drawings
Fig. 1 is the structural representation of high-power LED driving power source traditional in prior art.
Fig. 2 is the structural representation of the utility model embodiment 1.
Fig. 3 is the structural representation of the utility model embodiment 2.
Fig. 4 is the structural representation of the utility model embodiment 3.
Fig. 5 is the structural representation of the utility model embodiment 4.
Omitted the miscellaneous part irrelevant with the utility model design main points in figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
Embodiment 1
As shown in Figure 2, a kind of LED driving power of the present utility model comprises the LED light fixture 107 of power input 101, EMC circuit 102, rectification circuit 103, voltage conversion circuit 104, filter circuit 105, output current voltage detecting circuit 106 and the output of connection successively.Also comprise constant-current and constant-voltage control circuit, comprise and amplify driving 108, power factor control circuit 109, the input that amplifies driving 108 is connected with the output of output current voltage detecting circuit 106, the output that amplifies driving 108 is connected with the input of power factor control circuit 109, and the output of power factor control circuit 109 is connected with the input of voltage conversion circuit 104.Connect between rectification circuit 103 and voltage conversion circuit 104 simultaneously an inductance L 3 and piezo-resistance YM3 of parallel connection, the input of piezo-resistance YM3 is connected with the output of inductance L 3.
LED driving power of the present utility model is by power input 101 power supplies, in the present embodiment, use the AC220V power supply, input to successively the LED light fixture 107 of EMC circuit 102, rectification circuit 103, voltage conversion circuit 104, filter circuit 105, output current voltage detecting circuit 106 and output, wherein 102 pairs of external electromagnetic interference signals of EMC circuit suppress; Rectification circuit 103 is converted to direct current energy to the AC energy of power supply input; 104 of voltage conversion circuits are converted to required low-voltage dc signal with high voltage direct current, mainly comprise metal-oxide-semiconductor Q1 and winding T1, and capacitor C 6 in parallel between rectification circuit 103 and voltage conversion circuit 104 forms a lc circuit with inductance L 3; 105 alternating components that reduce as much as possible in pulsating dc voltage of filter circuit keep flip-flop, reduce the ripple coefficient of output voltage, make waveform become smoother, mainly comprise diode D1 and capacitor C 30; The current and voltage signals of 106 pairs of outputs of output current voltage detecting circuit detects and is delivered to amplify and drives 108, amplify and drive the 108 current and voltage signals corresponding control signals of generation after amplifying Treatment Analysis with output, be delivered to power factor control circuit 109, power factor control circuit is processed by analysis and is indicated, index signal is fed back to voltage conversion circuit, realize the control of constant current and constant voltage.Amplify Light Coupled Device U3 of series connection and capacitor C 22 in parallel between driving 108 and power factor control circuit 109, magnitude of voltage appearance fluctuation when 106 outputs of output current voltage detecting circuit, 109 control signal duty ratios that automatically change output of power factor control circuit, thereby change the ON time of metal-oxide-semiconductor Q1 in voltage conversion circuit 104, and then change output current and voltage, realize effective adjusting of constant current and constant voltage.
In the present embodiment, the model of power factor control circuit 109 is L6561, by 110 power supplies of DC12V power supply, can very accurately adjust overvoltage output.The utility model takes full advantage of the premium properties of power factor L6561: it has the current over-zero measuring ability, not only effectively avoided the adverse consequences of transformer due to saturated generation, reduce simultaneously the switching loss of metal-oxide-semiconductor, greatly improve the conversion efficiency of whole power circuit; It passes through the pulsed dc voltage after the detection rectification, automatically adjusts output frequency and duty ratio, improves conversion efficiency and the power factor of circuit; It has the overcurrent protection function of metal-oxide-semiconductor, and when the electric current of metal-oxide-semiconductor reached certain value, moment was turn-offed metal-oxide-semiconductor, effectively protects metal-oxide-semiconductor, makes reliablely, increases the service life.
In the present embodiment, the input of described amplification driving 108 is connected with the output short-circuit open loop protection circuit.When short circuit being detected, automatic shutdown circuit, and send warning, and prevent from endangering further expansion, reset through after the several seconds, if be still short circuit, again cut off circuit, constantly patrol ring, until fault is got rid of.
As shown in Figure 1 and Figure 2, compare with traditional high-power LED driving power source, the utility model has been cancelled pfc circuit, thereby do not need to use powerful metal-oxide-semiconductor and high frequency transformer in pfc circuit, cancelled simultaneously high-power, high back-pressure, fast recovery diode D2 and the large volume between pfc circuit and voltage conversion circuit, large capacity, high withstand voltage electrochemical capacitor C20.Said elements is the element that power is large, volume is large, failure rate is high, price is high, and the utility model has significantly reduced these elements, thereby simple and reasonable, can effectively increase work efficiency, and cost, working stability is reliable.Simultaneously, also cancel drive circuit, further simplified overall structure.In addition, increased inductance L 3 between rectification circuit and voltage conversion circuit, suppressed because difference mode signal is transmitted to the harmful effect that causes on electrical network.Owing to having cancelled high withstand voltage electrochemical capacitor C20, increased piezo-resistance YM3 between rectification circuit and voltage conversion circuit simultaneously, as the compensation of the inhibition ability that improves power supply surge to external world.
Embodiment 2
As shown in Figure 3; the difference of the present embodiment and embodiment 1 is: in the present embodiment; be connected with overvoltage crowbar 111 between described rectification circuit 103 and power factor control circuit 109; the input of overvoltage crowbar 111 is connected with the output of rectification circuit 103, and the output of overvoltage crowbar 111 is connected with the input of power factor control circuit 109.During higher than certain numerical value, overvoltage crowbar 111 is delivered to power factor control circuit 109 with signal, controls and cuts off voltage conversion circuit 104 when the voltage of rectification circuit 103; When voltage returned to normal range (NR), overvoltage crowbar 111 was delivered to signal again power factor control circuit 109, controlled turn-on voltage translation circuit 104.
Other structures are identical with embodiment 1.
Embodiment 3
As shown in Figure 4, the difference of the present embodiment and embodiment 1 is: in the present embodiment, the input of described amplification driving 108 is connected with thermal-shutdown circuit 112.When the excess Temperature of LED light fixture 107; thermal-shutdown circuit 112 is delivered to signal to amplify and drives 108; amplify the voltages increase that driving 108 feeds back to power factor control circuit 109; then make the control signal duty ratio of output reduce by power factor control circuit 109; and then the ON time of controlling metal-oxide-semiconductor Q1 in voltage conversion circuit 104 shortens; thereby force to reduce output current, avoid the LED light fixture to cause damage because of excess Temperature, further improve the reliability that uses.
Other structures are identical with embodiment 1.
Embodiment 4
As shown in Figure 5; the difference of the present embodiment and embodiment 1 is: in the present embodiment; be connected with overvoltage crowbar 111 between described rectification circuit 103 and power factor control circuit 109; the input of overvoltage crowbar 111 is connected with the output of rectification circuit 103, and the output of overvoltage crowbar 111 is connected with the input of power factor control circuit 109.During higher than certain numerical value, overvoltage crowbar 111 is delivered to power factor control circuit 109 with signal, controls and cuts off voltage conversion circuit 104 when the voltage of rectification circuit 103; When voltage returned to normal range (NR), overvoltage crowbar 111 was delivered to signal again power factor control circuit 109, controlled turn-on voltage translation circuit 104.
Simultaneously, in the present embodiment, the input of described amplification driving 108 also is connected with thermal-shutdown circuit 112.When the excess Temperature of LED light fixture 107; thermal-shutdown circuit 112 is delivered to signal to amplify and drives 108; amplify the voltages increase that driving 108 feeds back to power factor control circuit 109; then make the control signal duty ratio of output reduce by power factor control circuit 109; and then the ON time of controlling metal-oxide-semiconductor Q1 in voltage conversion circuit 104 shortens; thereby force to reduce output current, avoid the LED light fixture to cause damage because of excess Temperature, further improve the reliability that uses.
Other structures are identical with embodiment 1.
These are only preferred embodiment of the present utility model, but design concept of the present utility model is not limited to this, all insubstantial modifications of utilizing this design that the utility model is made are within also all falling into protection range of the present utility model.
Claims (6)
1. LED driving power, it is characterized in that, the LED light fixture that comprises the power input, EMC circuit, rectification circuit, voltage conversion circuit, filter circuit, output current voltage detecting circuit and the output that connect successively, also comprise simultaneously constant-current and constant-voltage control circuit, being connected input with voltage conversion circuit with the output of output current voltage detecting circuit respectively is connected, connect between described rectification circuit and described voltage conversion circuit an inductance and piezo-resistance in parallel, the input of piezo-resistance is connected with the output of inductance.
2. LED driving power according to claim 1, it is characterized in that, described constant-current and constant-voltage control circuit comprises that amplification drives, power factor control circuit, amplifying the input that drives is connected with the output of output current voltage detecting circuit, amplify the output that drives and be connected with the input of power factor control circuit, the output of power factor control circuit is connected with the input of voltage conversion circuit.
3. LED driving power according to claim 2; it is characterized in that; be connected with overvoltage crowbar between described rectification circuit and power factor control circuit; the input of overvoltage crowbar is connected with the output of rectification circuit, and the output of overvoltage crowbar is connected with the input of power factor control circuit.
4. LED driving power according to claim 2, is characterized in that, the input that described amplification drives is connected with thermal-shutdown circuit.
5. LED driving power according to claim 2, is characterized in that, the input that described amplification drives is connected with the output short-circuit open loop protection circuit.
6. the described LED driving power of according to claim 2 to 5 any one, is characterized in that, the model of described power factor control circuit is L6561.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200195227U CN203015236U (en) | 2013-01-15 | 2013-01-15 | A LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200195227U CN203015236U (en) | 2013-01-15 | 2013-01-15 | A LED driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203015236U true CN203015236U (en) | 2013-06-19 |
Family
ID=48606787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200195227U Expired - Fee Related CN203015236U (en) | 2013-01-15 | 2013-01-15 | A LED driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203015236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103068129A (en) * | 2013-01-15 | 2013-04-24 | 中山市雅乐思电器实业有限公司 | Light-emitting diode (LED) driving power supply |
| CN115085532A (en) * | 2022-07-18 | 2022-09-20 | 深圳莱福德科技股份有限公司 | High power factor low-voltage motor direct current fan lamp driver |
-
2013
- 2013-01-15 CN CN2013200195227U patent/CN203015236U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103068129A (en) * | 2013-01-15 | 2013-04-24 | 中山市雅乐思电器实业有限公司 | Light-emitting diode (LED) driving power supply |
| CN115085532A (en) * | 2022-07-18 | 2022-09-20 | 深圳莱福德科技股份有限公司 | High power factor low-voltage motor direct current fan lamp driver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103427656B (en) | A kind of crisscross parallel inverse-excitation type LED drive power and PFM control circuit thereof | |
| CN201414244Y (en) | Driving circuit for high-power LED street lamps | |
| CN102917511A (en) | Anti-lightning type LED (Light Emitting Diode) power supply | |
| CN203119598U (en) | Double-channel direct-current (DC) output waterproof constant current power source | |
| CN105491713A (en) | High-power LED street lamp drive circuit | |
| CN103442504A (en) | LED (Light Emitting Diode) constant current driving circuit based on PWM (Pulse-Width Modulation) light-adjusting mode | |
| CN103068129A (en) | Light-emitting diode (LED) driving power supply | |
| CN201830521U (en) | Offline type high-power LED (light-emitting diode) constant-current drive power supply | |
| CN203761633U (en) | Energy-saving LED traffic light with long service life | |
| CN204578876U (en) | A kind of power driving circuit of AC/DC | |
| CN201608944U (en) | Switch power supply without electrolytic capacitor | |
| CN203015236U (en) | A LED driving power supply | |
| CN203618173U (en) | LED lamp driving power based on primary side feedback | |
| CN203136240U (en) | Wide-range constant-current LED power supply VCC drive circuit | |
| CN102238784B (en) | Light-emitting diode (LED) power supply driving circuit | |
| CN202949600U (en) | Anti-lightning type light emitting diode (LED) power supply | |
| CN201182026Y (en) | Driving power supply device of LED lamp group | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN203435182U (en) | Staggered parallel flyback LED driving power supply and PFM control circuit thereof | |
| CN102118912B (en) | A kind of LED streetlamp power source circuit | |
| CN211378312U (en) | LED drive circuit of transformer substation | |
| CN202474845U (en) | Short circuit protection circuit and LED power supply circuit used for active PFC circuit output terminal | |
| CN202059625U (en) | LED road lamp power circuit | |
| CN202231900U (en) | LED power supply drive circuit | |
| CN202210885U (en) | Dimming drive power for LED lighting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20160115 |
|
| EXPY | Termination of patent right or utility model |