CN206341456U

CN206341456U - LED drive power and system

Info

Publication number: CN206341456U
Application number: CN201621471715.6U
Authority: CN
Inventors: 陈平物; 盛周军
Original assignee: Chongqing Aohai Huilong Big Data Co Ltd
Current assignee: Chongqing Aohai Huilong Big Data Co Ltd
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2017-07-18
Anticipated expiration: 2026-12-29

Abstract

The utility model provides a kind of LED drive power and system, belongs to technical field of electricity.Wherein, the LED drive power includes rectification protection module, transformer, switch module；By the rectification protection module with it is described transformer coupled, transmitted so as to which the rectification protection module can hand over external communication voltage signal to be converted to d. c. voltage signal to the transformer, coupled by the primary coil of the transformer with the switch module, the switch module is allowd to switch the connection between the primary coil of the transformer and the reference voltage end of the switch module, with the voltage at the primary coil two ends for changing the transformer, so that the secondary coil of the transformer exports stable voltage to the load equipment, so as to improve reliability and the life-span of the load equipment.

Description

LED drive power and system

Technical field

The utility model is related to technical field of electricity, in particular to a kind of LED drive power and system.

Background technology

With the development of science and technology and improve, be luminous with light emitting diode (Light Emitting Diode, LED) The light fixture that material makes has been obtained for being widely applied.But the driving power supply circuit of its LED is unsatisfactory, exist a lot Shortcoming, for example：The problems such as power factor (PF) is relatively low, power consumption is relatively low, constant-current voltage-stabilizing precision is relatively low, it is especially specific in sufficient wisdom piping lane Working environment under, the requirement of driving power supply or drive circuit to LED illumination product can be tightened up, but in current existing skill In art, the drive circuit in LED can not control to be passed through LED electric current well, can not export a stable voltage with LED luminous demand is met, when the luminosity for needing LED is reduced, the degree of accuracy for being passed through LED curent change can not be very Required adaptations of the good adaptation LED when low smooth, so that it is luminous unstable when low smooth to cause LED, so as to have impact on The reliability of LED illumination and life-span.

Therefore, it is the stable voltage of LED illumination output how by effective drive circuit, can with improve LED illumination It is current urgent problem by property and life-span.

Utility model content

The purpose of this utility model is to provide a kind of LED drive power and system, and it can export steady to load equipment Fixed voltage, to improve reliability and the life-span of load equipment.

What embodiment of the present utility model was realized in：

In a first aspect, the utility model embodiment provides a kind of LED drive power, it is described applied to LED drive system LED drive system also includes load equipment, and the LED drive power includes rectification protection module, transformer, switch module；Outside Portion's power supply is coupled with the rectification protection module, and the rectification protection module is coupled with the primary coil of the transformer, described The primary coil of transformer is coupled with the switch module, and the secondary coil of the transformer is coupled with the load equipment；Institute Stating switch module is used to switch the connection between the primary coil of the transformer and the reference voltage end of the switch module, with Change the voltage at the primary coil two ends of the transformer, so that the secondary coil of the transformer exports stable voltage to institute State load equipment.

Second aspect, the utility model embodiment provides a kind of LED drive system, and the LED drive system includes load Equipment and LED drive power, the LED drive power are coupled with the load equipment.

The beneficial effect of the utility model embodiment is：

The utility model embodiment provides a kind of LED drive power and system, by the rectification protection module with it is described It is transformer coupled, transmitted so that the rectification protection module can hand over external communication voltage signal to be converted to d. c. voltage signal to institute Transformer is stated, is coupled by the primary coil of the transformer with the switch module so that the switch module can switch Connection between the reference voltage end of the primary coil of the transformer and the switch module, to change the original of the transformer The voltage at two ends is enclosed in sideline, so that the stable voltage of the secondary coil output of the transformer is to the load equipment, so as to carry The reliability of the high load equipment and life-span.

Brief description of the drawings

, below will be to be used needed for embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.

A kind of first structure block diagram for LED drive system that Fig. 1 provides for the utility model embodiment；

A kind of second structured flowchart of LED drive system that Fig. 2 provides for the utility model embodiment；

A kind of 3rd structured flowchart of LED drive system that Fig. 3 provides for the utility model embodiment；

A kind of circuit theory diagrams for LED drive system that Fig. 4 provides for the utility model embodiment.

Icon：200-LED drive systems；210- load equipments；100-LED driving power supplies；110- transformers；120- is switched Module；122- first ends；The ends of 124- second；126- control ends；130- rectification protection modules；132- rectification circuits；134- is protected Circuit；140- controls circuit；150- current detection modules.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Generally here described in accompanying drawing and The component of the utility model embodiment shown can be arranged and designed with a variety of configurations.

Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit requirement The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.

, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for area in description of the present utility model Divide description, and it is not intended that indicating or implying relative importance.

In description of the present utility model, in addition it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set Put ", " coupling ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, Or be integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, intermediary can also be passed through It is indirectly connected to, can is the connection of two element internals.For the ordinary skill in the art, it can be managed with concrete condition Solve concrete meaning of the above-mentioned term in the utility model.

Other feature and advantage of the present utility model will illustrate in subsequent specification, also, partly from specification Become apparent, or understood by implementing the utility model embodiment.The purpose of this utility model and other advantages can Realize and obtain by specifically noted structure in the specification, claims and accompanying drawing write.

It refer to Fig. 1, a kind of first structure frame for LED drive system 200 that Fig. 1 provides for the utility model embodiment Figure, the LED drive system 200 includes LED drive power 100 and load equipment 210, the LED drive power 100 with it is described Load equipment 210 is coupled, and the LED drive power 100 is used to export stable voltage to the load equipment 210.

In the present embodiment, the load equipment 210 refers to various light-emitting lamps, including LED.

It refer to Fig. 2, a kind of the second structural frames of LED drive system 200 that Fig. 2 provides for the utility model embodiment Figure, the LED drive power 100 includes rectification protection module 130, transformer 110 and switch module 120；External power source with The rectification protection module 130 is coupled, and the rectification protection module 130 is coupled with the primary coil of the transformer 110, described The primary coil of transformer 110 is coupled with the switch module 120, and the secondary coil of the transformer 110 is set with the load Standby 210 coupling.

The transformer 110 is used for the secondary coil of the primary coil and the transformer 110 by the transformer 110 Galvanomagnetic-effect by the input voltage regulation of the external power source be voltage signal, and the voltage signal is inputted to the switch Module 120.The operation principle of the transformer 110 is the device for changing alternating voltage using the principle of electromagnetic induction, at this In embodiment, external power source is changed by transformer 110 and exported to the voltage of load equipment 210, so that load equipment 210 can connect A stable voltage is received, so as to improve reliability and the life-span of LED.

It refer to Fig. 3, a kind of the 3rd structural frames of LED drive system 200 that Fig. 3 provides for the utility model embodiment Figure.The LED drive power 100 also includes current detection module 150 and control circuit 140, and the current detection module 150 is used In the peak point current for the primary coil for detecting the transformer 110.The switch module 120 includes first end 122, the second end 124 couple with control end 126, the output end of the control circuit 140 with the control end 126 of the switch module 120, and described the One end 122 is coupled with the primary coil of the transformer 110, second end 124 and the input of the current detection module 150 End coupling, the output end of the current detection module 150 is coupled with the control circuit 140.

It refer to Fig. 4, a kind of circuit theory diagrams for LED drive system 200 that Fig. 4 provides for the utility model embodiment.

For the ease of having the He of first end 122 of the Signal-controlled switch module 120 of low and high level by pulse signal etc. The break-make and closure at the second end 124, the control end 126 of the switch module 120 are used for the pulse signal for receiving input, to control The break-make at the end 124 of first end 122 and second.

As a kind of embodiment, the switch module 120 can be：FET Q1.Because switch module 120 is wrapped Include：First end 122, the second end 124 and control end 126, so that FET Q1 grids can be control end 126, FET Q1 drain electrode can be first end 122, and FET Q1 source electrode can be the second end 124.

The control circuit 140 is used for cut-offfing for controlling switch module 120, so that by controlling the controlling switch of circuit 140 Module 120 is cut-off with certain frequency, and the direct current signal that just can export rectification protection module 130 changes into pulse letter Number.It is identical that the pulse signal of the primary coil of transformer 110 can be such that the secondary coil of transformer 110 is produced by electromagnetic induction The voltage signal of frequency, and the voltage signal is stable pulse voltage.By the secondary coil cc ' of transformer 110 with being set with load Standby 210 coupling, so that the secondary coil of transformer 110 is by stable pulse voltage output to load equipment 210.

As a kind of embodiment, the control circuit 140 includes：Control chip U1, the 6th resistance R6, the 7th resistance R7, the 4th electric capacity C4 and the 5th electric capacity C5.One end of the 6th resistance R6 is coupled with the GD ends of the control chip U1, is used for The conducting of the FET Q1 is driven, the other end of the 6th resistance R6 is coupled with the grid of the FET Q1, institute The one end for stating the 7th resistance R7 is coupled with one end of the 4th electric capacity C4, the other end and the control of the 7th resistance R7 Chip U1 RT ends coupling, the EN ends of the other end of the 4th electric capacity C4 respectively with the control chip U1 are coupled with CS ends, One end of the 5th electric capacity C5 is coupled with the Ctr1 ends of the control chip U1, the other end ground connection of the 5th electric capacity C5, The earth terminal GND ground connection of the control chip U1.

Control chip U1 uses model VS9931 chip, and the chip internal of the model is integrated with complete protection work( Can, including current-limiting protection, output voltage protection, output short circuit protection and overheat protector etc..

The primary coil of transformer 110 includes：First primary coil aa ', the second primary coil bb '.First primary coil Aa ' output end is coupled with FET Q1 drain electrode.FET Q1 grid is coupled with the 6th resistance R6 other end, field Effect pipe Q1 source electrode is coupled with the second primary coil bb ' one end.Due to FET Q1 source electrode also with control chip U1 Reference voltage end AUX coupling so that the second primary coil bb ' one end can be reference voltage end, i.e. the second primary coil Bb ' one end is ground reference point.

Coupled by the first primary coil aa ' of transformer 110 with FET Q1 drain electrode and primary coil bb ' and field Effect pipe Q1 source electrode coupling, and control chip U1 is coupled by the grid with FET Q1, so that control chip U1 can Control FET Q1's cut-offs.Control chip U1 control FET Q1 intermittence conductings, so that rectification protection module 130 is defeated The direct current signal gone out is cut to pulse signal.First primary coil aa ' can make the first primary coil aa ' by pulse signal Alternating magnetic field is produced, so as to make the second primary coil bb ' produce the frequency step-down pulse stable with pulse signal identical Voltage.

First primary coil aa ' can make the first primary coil aa ' produce alternating magnetic field by pulse signal, so as to Secondary coil cc ' is set to produce voltage by electromagnetic induction.Optionally, in the present embodiment, transformer 110 inputs external power source Voltage signal step-down.Therefore, secondary coil cc ' can produce the frequency step-down pulse electricity stable with pulse signal identical Pressure, the step-down pulse voltage of the stabilization can be output to load equipment 210.

The current detection module 150 is used for the peak point current for detecting the first primary coil aa ' of the transformer 110 I1, the current detection module 150 includes first resistor R1 and the first electric capacity C1, first resistor R1 one end and the field Effect pipe Q1 source electrode coupling, the other end of the first resistor R1 is coupled with one end of the first electric capacity C1, and described first The electric capacity C1 other end is coupled with the AUX ends of the control chip U1.

The AC rectification that the rectification protection module 130 is used to input the external power source is direct current, and inputs change The primary coil of depressor 110.As a kind of embodiment, the rectification protection module 130 includes bridge shape rectification circuit 132 with protecting Protection circuit 134, the input of the bridge shape rectification circuit 132 is coupled with the external power source, the bridge shape rectification circuit 132 Output end is coupled with the input of the protection circuit 134, the output end of the protection circuit 134 and the transformer 110 Primary coil is coupled.

The bridge shape rectification circuit 132 includes the first diode D1, the second diode D2, the 3rd diode D3, the four or two Pole pipe D4 and fuse F1, one end of the fuse F1 is coupled with the port 1 of the external power source, and the fuse F1's is another One end is coupled with the negative pole of the first diode D1 and the second diode D2 positive pole respectively, and the first diode D1 is just Pole couples and is grounded with the positive pole of the 3rd diode D3, negative pole and the 4th diode D4 of the 3rd diode D3 Positive pole coupling, tie point and the external electrical of the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4 The port 2 in source is coupled, the negative pole of the second diode D2 and the negative couplings of the 3rd diode D3, and with the protection The input coupling of circuit 134.

The protection circuit 134 includes second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the second electricity Hold C2, the 3rd electric capacity C3, the 5th diode D5 and the 6th diode D6, one end of the second resistance R2 and the two or two pole Pipe D2 negative couplings, the other end of the second resistance R2 is coupled with one end of the 3rd resistor R3, the 3rd resistor The R3 other end is coupled with the EN ends of the control chip U1 and the VCC ends of the control chip U1 respectively, the transformer 110 The first primary coil aa ' input one end respectively with the second resistance R2, one end of the second electric capacity C2, described 4th resistance R4 one end and the coupling of one end of the 3rd electric capacity C3, the other end of the 4th resistance R4 is respectively with described the The negative couplings of the three electric capacity C3 other end and the 5th diode D5, positive pole and the transformation of the 5th diode D5 First primary coil aa ' of device 110 output end coupling, the other end ground connection of the second electric capacity C2, the 6th diode D6 positive pole is coupled with the second primary coil bb ' of the transformer 110, the negative pole and the described 5th of the 6th diode D6 Resistance R5 one end coupling, the other end of the 5th resistance R5 is coupled with control circuit 140.

In addition, the LED drive power 100 also includes the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 7th Diode D7 and the 6th electric capacity C6, the 9th resistance R9 one end and the second primary coil bb ' couplings of the transformer 110 Close, the other end of the 9th resistance R9 couples with one end of the 8th resistance R8, the other end of the 8th resistance R8 and One end coupling of the first resistor R1, the positive pole of the 7th diode D7 is with the secondary coil cc's ' of the transformer 110 One end is coupled, the negative pole of the 7th diode D7 respectively with one end of the 6th electric capacity C6 and the tenth resistance R10 One end is coupled, the 6th electric capacity C6 with the tenth resistance R10 is in parallel is coupled with the load equipment 210, to increase load The load of equipment 210.

The operation principle of LED drive power 100 that the utility model embodiment is provided is：When FET Q1 is turned on, External power source passes through the primary coil of transformer 110 and the first resistor R1 of current detection module 150 so that transformer 110 is stored up Can, until reaching control chip U1 internal control time t1, now the electric current of the primary coil of transformer 110 is I1；On the spot When effect pipe Q1 disconnects, because the primary coil of transformer 110 does not have discharge path, therefore the electric current of transformer 110 passes through secondary line Circle flows through the 7th diode D7 and the electric capacity C6 of load equipment 210 and the 6th is charged, after the energy of transformer 110 is released, under wait The arriving of one turn-on cycle.Assuming that the energy of transformer 110 is transmitted without loss, then during then scene effect pipe Q1 is turned on Energy is transmitted to load equipment 210 during obtained peak point current I1, scene effect pipe Q1 disconnect, if the original of transformer 110 Sideline is enclosed and the turn ratio of secondary coil is n：1, then under stable case, it finally can obtain being averaged for output loading equipment 210 Electric current is the 7th diode D7 average current, and the average current that can then obtain output loading equipment 210 is I2=1/2* N*I1*t2/T, wherein, t2 is the inductance degaussing time of transformer 110, and T is the cycle.And the peak of the primary coil of transformer 110 Value electric current I1 flows through first resistor R1, obtains the CS pin position that voltage Vcs is input to control chip U1, obtaining by sample circuit Vcs crest voltage Vcspp, degaussing time t1 is obtained by assists winding partial pressure input signal Vaux, and cycle T is in chip Compared inside working frequency corresponding cycle, control chip U1 by controlling Vcspp*t1/T value with reference voltage 0.2v Error amplifier is input to, it exports Vea to control ON time t1, can obtain a current controlled circuit；May finally The electric current for obtaining output loading equipment 210 is：I2=1/2*n*200mV/R1, wherein R1 are current sense resistor.Then by this 100 exportable stable voltages of LED drive power are to load equipment 210, so as to improve the reliability of the load equipment 210 Property and life-span.

In summary, the utility model embodiment provides a kind of LED drive power and system, and mould is protected by the rectification Block with it is described transformer coupled so that the rectification protection module can hand over external communication voltage signal to be converted to d. c. voltage signal Transmit to the transformer, coupled by the primary coil of the transformer with the switch module so that the switch module The connection between the primary coil of the transformer and the reference voltage end of the switch module can be switched, to change the change The voltage at the primary coil two ends of depressor, so that the stable voltage of the secondary coil output of the transformer to the load is set It is standby, so as to improve reliability and the life-span of the load equipment.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modifications, equivalent substitutions and improvements made etc. should be included within protection domain of the present utility model.

Claims

1. a kind of LED drive power, it is characterised in that applied to LED drive system, the LED drive system also includes load Equipment, the LED drive power includes rectification protection module, transformer, switch module；External power source protects mould with the rectification Block is coupled, and the rectification protection module couples with the primary coil of the transformer, the primary coil of the transformer with it is described Switch module is coupled, and the secondary coil of the transformer is coupled with the load equipment；

The switch module is used to switch between the primary coil of the transformer and the reference voltage end of the switch module Connection, with the voltage at the primary coil two ends for changing the transformer, so that the secondary coil of the transformer exports stabilization Voltage is to the load equipment.

2. LED drive power according to claim 1, it is characterised in that the LED drive power also includes current detecting Module and control circuit, the switch module include first end, the second end and control end, the output end of the control circuit and institute State the control end coupling of switch module, the first end couples with the first primary coil of the transformer, second end and The input coupling of the current detection module, the output end of the current detection module is coupled with the control circuit.

3. LED drive power according to claim 2, it is characterised in that the current detection module includes first resistor With the first electric capacity, one end of the first resistor is coupled with the second end of the switch module, the other end of the first resistor Coupled with one end of first electric capacity, the other end of first electric capacity is coupled with the control circuit.

4. LED drive power according to claim 2, it is characterised in that the switch module includes FET, described The grid of FET is the control end of the switch module, and the drain electrode of the FET is described the of the switch module One end, the source electrode of the FET is the second end of the switch module.

5. LED drive power according to claim 1, it is characterised in that the primary coil of the transformer includes first Primary coil and the second primary coil, one end of first primary coil are coupled with the external power source, first primary side The other end of coil is coupled with the first end of the switch module, one end ground connection of second primary coil, and described second is former The other end of sideline circle is coupled with the second end of the switch module.

6. LED drive power according to claim 1, it is characterised in that the rectification protection module includes bridge shape rectification Circuit and protection circuit, the input of the bridge shape rectification circuit are coupled with the external power source, the bridge shape rectification circuit Output end is coupled with the input of the protection circuit, the output end of the protection circuit and the primary coil coupling of the transformer Close.

7. LED drive power according to claim 6, it is characterised in that the bridge shape rectification circuit includes the one or two pole Pipe, the second diode, the 3rd diode, the 4th diode and fuse, one end of the fuse and the external power source coupling Close, the other end of the fuse couples with the negative pole of first diode and the positive pole of the second diode respectively, described the The positive pole of one diode is coupled and is grounded with the positive pole of the 3rd diode, the negative pole and the described 4th of the 3rd diode The positive pole coupling of diode, the negative couplings of the negative pole of second diode and the 3rd diode, and with the protection The input coupling of circuit.

8. LED drive power according to claim 7, it is characterised in that the protection circuit includes second resistance, the 3rd Resistance, the 4th resistance, the second electric capacity, the 3rd electric capacity and the 5th diode, one end of the second resistance and the two or two pole The negative couplings of pipe, the other end of the second resistance is coupled with one end of the 3rd resistor, the 3rd resistor it is another End is coupled with controlling circuit, one end of the primary coil of transformer one end respectively with the second resistance, described second One end coupling of one end of electric capacity, one end of the 4th resistance and the 3rd electric capacity, the other end point of the 4th resistance Not with the other end and the negative couplings of the 5th diode of the 3rd electric capacity, the positive pole of the 5th diode with it is described The other end coupling of the primary coil of transformer.

9. LED drive power according to claim 8, it is characterised in that the protection circuit also include the 5th resistance with 6th diode, the positive pole of the 6th diode is coupled with the primary coil of the transformer, the 6th diode it is negative Pole is coupled with one end of the 5th resistance, and the other end of the 5th resistance is coupled with control circuit.

10. a kind of LED drive system, it is characterised in that the LED drive system includes load equipment and claim 1-9 Any described LED drive power, the LED drive power is coupled with the load equipment.