CN202841641U - Simplified light-emitting diode (LED) drive circuit - Google Patents
Simplified light-emitting diode (LED) drive circuit Download PDFInfo
- Publication number
- CN202841641U CN202841641U CN 201220535173 CN201220535173U CN202841641U CN 202841641 U CN202841641 U CN 202841641U CN 201220535173 CN201220535173 CN 201220535173 CN 201220535173 U CN201220535173 U CN 201220535173U CN 202841641 U CN202841641 U CN 202841641U
- Authority
- CN
- China
- Prior art keywords
- energy storage
- switching tube
- storage inductor
- drive circuit
- supply module
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a simplified LED drive circuit which comprises an oscillation inhibitory type convertor. The convertor comprises a switching tube Q, an energy storage inductor L and a switching tube drive circuit. The simplified LED drive circuit is characterized in that the switching tube drive circuit is connected with a power supply module supplying power for the circuit; an input end of the power supply module is connected with one point in a load current circuit of the convertor, and an output end of the power supply module is connected with a power supply end of the switching tube drive circuit; and windings of the energy storage inductor L are connected into one, and all elements of the convertor, including the energy storage inductor L, pins are in surface mounting structures. As energy of the power supply module for the switching tube drive circuit for controlling the switching tube all comes from the load circuit, and extra auxiliary winds are not needed to be inducted with the energy storage inductor L to obtain sampled voltages, the windings of the energy storage inductor L can be connected into one or more connected in series and can be achieved through surface mounting package structures.
Description
Technical field
The utility model relates to a kind of circuit for the led light source driving, specifically led drive circuit a kind of simplification, that can omit the plug-in unit operation.
Background technology
Led light source has begun to be used in a large number in the lighting source, because its electrical characteristic, so when making its power supply with civil power, must need suitable driver led light source to be realized the functions such as constant current, adjusting, protection.This quasi-driver usually uses the original papers such as integrated circuit, switching tube, high frequency energy storage inductor, thereby needs fixing circuit board, needs the welding procedures such as plug-in unit, paster.
Identical with other electronic circuit board machining process, the required plug-in unit technique of element of being permitted the pin encapsulation is with the installing hole on its component pin alignment circuit plate, be fixed on ad-hoc location after the insertion, be communicated with so that follow-up backflow/wave-soldering can be automatically fixes its pin and pad on the circuit board.For example only have diode, the triode person of few pin for standard component, its plug-in unit technique can realize by automatism card machine, guaranteed efficiency in production in enormous quantities; Yet for much non-standard/many pins device high frequency energy storage inductor for example, its automatic insertion is realized very difficult, no matter be contraposition or fixing, so, has to still use the technique of manually finishing its plug-in unit in batch production.This has just prolonged the process time, and its processing quality is difficult to guarantee.
The utility model content
Be difficult to avoid the problem that time is long, yield is low brought for existing led driver plug-in unit technique, the utility model proposes a kind of led drive circuit of simplification, its technical scheme is as follows:
A kind of led drive circuit of simplification comprises the converter of a vibration inhibition type, and this converter comprises a switching tube Q, an energy storage inductor L and a switch tube driving circuit; This switch tube driving circuit connects a supply module to its power supply; Its input of this supply module be connected in the load current loop of this converter a bit, its output is connected in the power end of this switch driving circuit; It is complete one that its winding of this energy storage inductor L is communicated with.
As the preferred person of the technical program, can have improvement aspect following:
In the preferred embodiment, the electric current of this energy storage inductor L flows into end and is communicated with switching tube Q outflow of bus current end; It is anodal with in parallel with this energy storage inductor L again after load is connected for one diode D6; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q;
Have one section power supply winding L 1 on this energy storage inductor L, the end that this power supply winding L 1 electric current flows into and this supply module altogether, an end of its outflow of bus current is connected in the input of this supply module; Wherein, this supply module comprises:
Diode D7 is series at the end of dropping resistor R6, and the other end of R6 is connected with the end of filter capacitor C6; The positive pole of D7 is as this input, and the tie point of R6 and C6 is as output; The other end of C6 is connected with the ground of supply module.
In the preferred embodiment, this energy storage inductor L comprises a load winding L 3 and the vibration winding L 4 that is in series, and this switch tube driving circuit comprises: vibration winding L 4 is connected between the collector and emitter of a driving tube Q2; Driving tube Q2 collector electrode is connected with switching tube Q base stage, and emitter is connected with the emitter of Q; The electric current of this load winding flows into end and is communicated with switching tube Q outflow of bus current end; It is anodal with in parallel with this energy storage inductor L again after load is connected for diode D6; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q.
In the preferred embodiment, the input of this supply module has the capacitor C 6 for energy storage and filtering by rectifier bridge input or output cathode that a controlled protection switch K1 is connected in this converter between this input and the ground.
In the preferred embodiment, this switch tube driving circuit is the auto-excitation type circuit, time delay resistance R3 of its switching tube Q base stage series connection.
In the preferred embodiment, this switch tube driving circuit has the high pressure test side that can cut off switching tube work according to the loaded work piece state; This high pressure test side is connected to the current output terminal of inductance by a dropping resistor R7.
In the preferred embodiment, all components and parts all are surface-pasted structure.
The beneficial effect that the technical program is brought is:
1. the supply module that is used for the switch tube driving circuit of control switch pipe, its energy all comes from load circuit, do not need the extra winding of paying to respond to mutually the voltage that obtains taking a sample with energy storage inductor L, therefore its winding of this energy storage inductor can be communicated with and is complete one, perhaps series connection is a plurality of, all can adopt surface-pasted encapsulating structure to realize;
2. all elements of converter in this programme, its pin is surface-pasted structure.Realized the scheme that entirely mounts of RCC circuit, do not needed the transformer of multistage coil, can omit the plug-in unit operation fully, realized that the driver of RCC converter mounts scheme entirely.
3. the volume of whole converter finished product is correspondingly reduced, and the enforcement of small size scheme is comparatively easy.
4. number of elements is few, and operation is simple when the LED lamp assembled, and speed is fast.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing embodiment:
Fig. 1 is the schematic diagram of the utility model embodiment one;
Fig. 2 is the schematic diagram of the utility model embodiment two;
Fig. 3 is the schematic diagram of the utility model embodiment three;
Fig. 4 is the schematic diagram of the utility model embodiment four;
Fig. 5 is the schematic diagram of the utility model embodiment five;
Fig. 6 is the schematic diagram of the utility model embodiment six;
Fig. 7 is the schematic diagram of the utility model embodiment seven;
Fig. 8 is the schematic diagram of the utility model embodiment five.
Embodiment
Embodiment one:
As shown in Figure 1, a kind of led drive circuit that omits the plug-in unit operation comprises the converter of a vibration inhibition type, and this converter comprises a switching tube Q, an energy storage inductor L and a switch tube driving circuit 10; In the conduction and cut-off circulation of switching tube Q, energy storage inductor L accepts the energy from power supply, and discharges under suitable electric current to load LOAD by discharge diode D6.
This switch tube driving circuit 10 connects a supply module 20; The electric current of this energy storage inductor L flows into end and is communicated with switching tube Q outflow of bus current end; It is in parallel with this energy storage inductor L after its positive pole of diode D6 is connected with load; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q; So, these supply module 20 its inputs, namely the positive pole of D7 be connected in the load current loop of this converter a bit, this point is positioned at the end of energy storage inductor L, supply module 20 its outputs are connected in the power end 12 of this switch driving circuit 10.
In the present embodiment, supply module 20 its energy that are used for the switch tube driving circuit 10 of control switch pipe all come from load circuit, do not need the extra winding of paying to respond to mutually the voltage that obtains taking a sample with energy storage inductor L, therefore its winding of this energy storage inductor L can be communicated with for complete one, can adopt surface-pasted encapsulating structure to realize; And all elements of the present embodiment converter, its pin is surface-pasted structure.So the present embodiment has been realized the scheme that entirely mounts of RCC circuit, do not need the transformer of multistage coil, can omit the plug-in unit operation fully, realize that the driver of RCC converter mounts scheme entirely.
Switch tube driving circuit 10 also has a high pressure test side 13, is connected to load LOAD by R7 anodal, can cut off Q according to the situation of load LOAD and realize protection.
Embodiment two:
As shown in Figure 2, a kind of led drive circuit that omits the plug-in unit operation comprises the converter of a vibration inhibition type, and this converter comprises a switching tube Q, an energy storage inductor L and a switch tube driving circuit 10; In the conduction and cut-off circulation of switching tube Q, energy storage inductor L accepts the energy from power supply, and discharges under suitable electric current to load LOAD by discharge diode D6.
This switch tube driving circuit 10 connects a supply module 20; The electric current of this energy storage inductor L flows into end and is communicated with switching tube Q outflow of bus current end; Have one section power supply winding L 1 on this energy storage inductor L, the end that its electric current flows into and this supply module 10 altogether 11, an end of its outflow of bus current is connected in the input of this supply module 10, i.e. and the positive pole of D7 also is a bit in the load current loop of converter.
It is in parallel with this energy storage inductor L after its positive pole of diode D6 is connected with load equally; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q; Supply module 20 its outputs are connected in the power end 12 of this switch driving circuit 10.As seen, the present embodiment is taken from load circuit with the power supply of switch tube driving circuit 10 equally, utilizes the power supply winding L 1 of an energy storage inductor L part itself as its power supply source, also can realize the whole circuit Surface Mounting Technology, has omitted the plug-in unit operation.
Switch tube driving circuit 10 also has a high pressure test side 13, is connected to load LOAD by R7 anodal, can cut off Q according to the situation of load LOAD and realize protection.
Embodiment three:
As shown in Figure 3, the schematic diagram of the utility model embodiment three, in the present embodiment, this energy storage inductor L comprises a load winding L 3 and the vibration winding L 4 that is in series, vibration winding L 4 is connected between the collector and emitter of a driving tube Q2; Driving tube Q2 collector electrode is connected with switching tube Q base stage, and emitter is connected with the emitter of Q; The electric current of this load winding flows into end and is communicated with switching tube Q outflow of bus current end; It is anodal with in parallel with this energy storage inductor L again after load is connected for diode D6; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q.
When load winding L 3 releases energy to load, can give simultaneously capacitor C 6 chargings, the voltage of C6 is substantially identical with the load output voltage, when C6 voltage surpasses voltage-stabiliser tube voltage, trigger voltage-stabiliser tube D8 conducting, drive the Q2 conducting, so that switching tube Q turn-offs, circuit is out of service.So, the complexity that this programme has avoided isolated windings that energy storage inductor L is had equally, thereby realize full paster technique, simultaneously, the circuit element of this programme is few, with low cost, the circuit volume is little, has given full play to the advantage of paster technique, especially, supply module 20 and switch tube driving circuit 10 can concentrate in the middle of the same IC, further realize high integrated, small size.
Embodiment four:
As shown in Figure 4, the schematic diagram of the utility model embodiment four, the characteristics of this embodiment maximum are, the input of supply module 20 is connected to rectifier bridge 30 its output cathodes repeatedly, the current circuit of load LOAD equally, but the power supply of supply module 20 comes from rectifier bridge 30, so away from L, make energy storage inductor L can have compacter volume.The power supply of C6 by K1 from cathode rectifier, this voltage all changes with the alternating current of input, utilize resistance R 1 to detect the voltage of input, opening and closing with driving switch pipe K1, so that K1 is open-minded when input voltage is low, K2 turn-offs when voltage is high, can utilize like this input power directly to power to switch tube driving circuit 10 drive IC, has omitted extra Transformer Winding.
In this programme, switch tube driving circuit 10 also has a high pressure test side 13, is connected to load LOAD by R7 anodal, can cut off Q according to the situation of load LOAD and realize protection.
Embodiment five:
As shown in Figure 5, the present embodiment five is similar with embodiment four.The end of different the is input K1 of supply module 20 directly connects the input of rectifier bridge 30, this tie point also belongs to the current circuit of load LOAD, can give equally switch tube driving circuit 10 power supplies, and realize simplification and the surface mount process of energy storage inductor L.
The high pressure test side 13 that the present embodiment has switch tube driving circuit 10 equally has the high pressure test side 13 that can cut off switching tube work according to the loaded work piece state; This high pressure test side 13 is connected to the positive pole of this load LOAD by a dropping resistor R7.
Embodiment six:
As shown in Figure 6, the schematic diagram of the utility model embodiment six.The present embodiment is an auto-excitation type person, and supply module 20 comprises vibration winding L 4 and time delay resistance R 3, and switch tube driving circuit 10 comprises voltage stabilizing didoe D8 and base capacity C3.In the driving process of switching tube Q, can utilize the charging voltage of voltage-stabiliser tube D8 restriction C3, come the driving time of control switch pipe Q with this, so that when the L4 feedback voltage increased, the driving time of switching tube can not increase simultaneously.This circuit is very succinct, adopts the paster technique of exempting from plug-in unit to implement volume little.
Embodiment seven:
As shown in Figure 7, the winding L 5 that the utility model embodiment seven schematic diagrames, the present embodiment are used for vibration and power supply is independent of outside the energy storage inductor L remainder similar embodiment six with L6.This circuit is also more succinct.Small volume.
Embodiment eight:
As shown in Figure 8, the utility model embodiment eight schematic diagrames, the present embodiment is compared with embodiment seven, and its supply module 20 is similar; If utilize the winding of L5, form a negative feedback, when input voltage raises, cause the relative V3 voltage of V2 to raise simultaneously, because V1 is limited by voltage-stabiliser tube to the voltage of V3, cause the on the contrary reduction of the relative v2 of v1, reduce the driving time of switching tube Q, profit can change by control circuit power in such a way.L5 can separate with L with L6, also can be to be unified in the same transformer, forms a continuous three-winding transformer, so, energy storage inductor can be designed to composite type, more can satisfy relatively harsher small size requirement.
The above, it only is the utility model preferred embodiment, therefore can not limit according to this scope that the utility model is implemented, the equivalence of namely doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (7)
1. the led drive circuit of a simplification comprises the converter of a vibration inhibition type, and this converter comprises a switching tube Q, an energy storage inductor L and a switch tube driving circuit; It is characterized in that:
This switch tube driving circuit connects a supply module to its power supply; Its input of this supply module be connected in the load current loop of this converter a bit, its output is connected in the power end of this switch driving circuit; It is complete one that its winding of this energy storage inductor L is communicated with.
2. the led drive circuit of described a kind of simplification according to claim 1, it is characterized in that: the electric current of this energy storage inductor L flows into end and is communicated with switching tube Q outflow of bus current end; It is anodal with in parallel with this energy storage inductor L again after load is connected for one diode D6; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q;
Have one section power supply winding L 1 on this energy storage inductor L, the end that this power supply winding L 1 electric current flows into and this supply module altogether, an end of its outflow of bus current is connected in the input of this supply module; Wherein, this supply module comprises:
Diode D7 is series at the end of dropping resistor R6, and the other end of R6 is connected with the end of filter capacitor C6; The positive pole of D7 is as this input, and the tie point of R6 and C6 is as output; The other end of C6 is connected with the ground of supply module.
3. the led drive circuit of described a kind of simplification according to claim 1, it is characterized in that: this energy storage inductor L comprises a load winding L 3 and the vibration winding L 4 that is in series, this switch tube driving circuit comprises: vibration winding L 4 is connected between the collector and emitter of a driving tube Q2; Driving tube Q2 collector electrode is connected with switching tube Q base stage, and emitter is connected with the emitter of Q; The electric current of this load winding flows into end and is communicated with switching tube Q outflow of bus current end; It is anodal with in parallel with this energy storage inductor L again after load is connected for diode D6; Wherein the negative pole of D6 is connected in the outflow of bus current end of switching tube Q.
4. the led drive circuit of described a kind of simplification according to claim 1; it is characterized in that: the input of this supply module has the capacitor C 6 for energy storage and filtering by rectifier bridge input or output cathode that a controlled protection switch K1 is connected in this converter between this input and the ground.
5. the led drive circuit of described a kind of simplification according to claim 1, it is characterized in that: this switch tube driving circuit is the auto-excitation type circuit, time delay resistance R3 of its switching tube Q base stage series connection.
6. according to claim 1 and 2 or the led drive circuit of 3 or 4 or 5 described a kind of simplification, it is characterized in that: this switch tube driving circuit has the high pressure test side that can cut off switching tube work according to the loaded work piece state; This high pressure test side is connected to the current output terminal of inductance by a dropping resistor R7.
7. the led drive circuit of described a kind of simplification according to claim 6, it is characterized in that: all components and parts all are surface-pasted structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220535173 CN202841641U (en) | 2012-10-18 | 2012-10-18 | Simplified light-emitting diode (LED) drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220535173 CN202841641U (en) | 2012-10-18 | 2012-10-18 | Simplified light-emitting diode (LED) drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202841641U true CN202841641U (en) | 2013-03-27 |
Family
ID=47953226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220535173 Expired - Fee Related CN202841641U (en) | 2012-10-18 | 2012-10-18 | Simplified light-emitting diode (LED) drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202841641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451630A (en) * | 2018-12-27 | 2019-03-08 | 宁波远东照明有限公司 | A kind of LED driver |
| CN109936888A (en) * | 2017-12-15 | 2019-06-25 | 松下知识产权经营株式会社 | High frequency drive circuit and the lighting device for using the high frequency drive circuit |
-
2012
- 2012-10-18 CN CN 201220535173 patent/CN202841641U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936888A (en) * | 2017-12-15 | 2019-06-25 | 松下知识产权经营株式会社 | High frequency drive circuit and the lighting device for using the high frequency drive circuit |
| CN109936888B (en) * | 2017-12-15 | 2022-10-28 | 松下知识产权经营株式会社 | High-frequency driving circuit and lighting device using same |
| CN109451630A (en) * | 2018-12-27 | 2019-03-08 | 宁波远东照明有限公司 | A kind of LED driver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101882879A (en) | Circuit converting constant current source to constant voltage source and light using same | |
| CN101212850B (en) | Pulsed driven LED lighting circuit | |
| CN201846423U (en) | LED backlight television and power source used for same | |
| CN103458557A (en) | LED drive control circuit and LED lamp | |
| CN104703330A (en) | LED lamp power supply circuit | |
| CN102404904B (en) | Control device of solar street lamp | |
| CN202652073U (en) | Switch power supply circuit capable of realizing output constant current control | |
| CN202841641U (en) | Simplified light-emitting diode (LED) drive circuit | |
| CN203368849U (en) | LED driving circuit compatible with a variety of voltage outputs, and driving power source | |
| CN108377595B (en) | Multifunctional integrated low-cost backlight circuit and display device | |
| CN203734894U (en) | LED drive circuit | |
| CN104981078A (en) | LED music lamp based on Bluetooth control | |
| CN102238784B (en) | Light-emitting diode (LED) power supply driving circuit | |
| KR20190109547A (en) | Protection circuit and LED driving circuit | |
| CN103226374A (en) | Maximum power point tracking circuit of constant flow source control photovoltaic panel | |
| CN201947180U (en) | Non-isolated flyback switch power circuit | |
| CN207369369U (en) | LED power and LED display device | |
| CN206341448U (en) | One kind is applied to powerful constant-current drive circuit | |
| CN202475266U (en) | LED (Light-Emitting Diode) driving power supply control chip on reduced withstand voltage grade | |
| CN205040055U (en) | Light -emitting diode driving circuit | |
| CN204231725U (en) | Novel RCC switching power circuit | |
| CN204948408U (en) | A kind of LED music lamp based on Bluetooth control | |
| CN208317056U (en) | A kind of multifunctional integrated low-cost backlight circuit and display equipment | |
| CN202269066U (en) | LED bulb lamp driver with temperature control | |
| CN202713734U (en) | High power factor fully isolated constant current drive LED illuminating lamp |
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: 20130327 Termination date: 20171018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |