CN206004953U - A kind of adjustable LED drive circuit of output current - Google Patents
A kind of adjustable LED drive circuit of output current Download PDFInfo
- Publication number
- CN206004953U CN206004953U CN201621004512.6U CN201621004512U CN206004953U CN 206004953 U CN206004953 U CN 206004953U CN 201621004512 U CN201621004512 U CN 201621004512U CN 206004953 U CN206004953 U CN 206004953U
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- semiconductor
- oxide
- branch road
- metal
- drive circuit
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Abstract
This utility model is related to a kind of adjustable LED drive circuit of output current, including primary side feedback constant current chip, inductive element and metal-oxide-semiconductor, described primary side feedback constant current chip includes a feedback pin and an output pin, described output pin couples the grid of metal-oxide-semiconductor, missing of described metal-oxide-semiconductor couples inductive element, it is coupled with the regulation branch road of at least two groups of settings parallel with one another, one end of described regulation branch road is coupled to feedback pin, and the other end is grounded between the source electrode of described metal-oxide-semiconductor and feedback pin；Described regulation branch road includes being arranged in series switch element and adjusts resistance, described switch element includes jumper cap, first row stitch and second row stitch, described first row stitch connects feedback pin, described second row stitch connects regulation resistance, and described jumper cap is used for realizing the electrical connection between first row stitch and second row stitch.
Description
Technical field
This utility model is related to field field of LED drive technology and in particular to a kind of driving of regulation LED drive current is electric
Road and regulation circuit.
Background technology
In field of LED illumination, need to LED design driven circuit, the setting of drive circuit needs the institute according to LED
Operating current difference is needed to be correspondingly arranged, and if such arranged, species is relatively on same power grade due to LED
Many, if so being so correspondingly arranged, the species that will result in LED drive circuit increases, and increased design and the cost of processing.
And existing LED drive circuit as shown in figure 1, include a primary side feedback constant current chip, inductive element, metal-oxide-semiconductor with
And output current distribution resistance RX, by arranging the resistance of RX, and protective resistance R0, by connection side as depicted
Formula, designs the resistance of different RX it is possible to realize the control to primary side feedback constant current chip output current, so designs, no
Doubt the cost of increased design and processing, and if RX is designed to slide rheostat, one, circuit volume is larger, and two, handss
Easily error in the dynamic output current that adjusts, causes the LED lamp life-span to be affected.
Utility model content
The purpose of this utility model is, provides a kind of output current adjustable LED drive circuit, solves above technology and asks
Topic；
The technical problem that this utility model is solved can employ the following technical solutions to realize：A kind of output current is adjustable
LED drive circuit, including primary side feedback constant current chip, inductive element and metal-oxide-semiconductor, described primary side feedback constant current chip includes
There are a feedback pin and an output pin, described output pin couples the grid of metal-oxide-semiconductor, missing of described metal-oxide-semiconductor couples perception
Element is it is characterised in that be coupled with the regulation of at least two groups of settings parallel with one another between the source electrode of described metal-oxide-semiconductor and feedback pin
Branch road, one end of described regulation branch road is coupled to described feedback pin, and the other end is grounded；Described regulation branch road includes being arranged in series
Switch element and regulation resistance, described switch element includes jumper cap, first row stitch and second row stitch, described first pricking with needle
Foot connects described feedback pin, and described second row stitch connects described regulation resistance, and described jumper cap is used for realizing described first
Electrical connection between pricking with needle foot and described second row stitch.
Arranged by such, first, adjust the node location that branch road connects, any one adjusts resistance accesses feedback pin,
The resistance adjusting branch road will be changed, and change the output voltage of primary side feedback constant current chip；And user only needs to wire jumper
Cap is plugged on the connection that just can complete this branch road between the first header pin and the second header pin, and circuit small volume,
To operate more convenient simultaneously, thus can adjust resistance thus adjusting output current according to actual service rating, and only use
Respectively each adjusting resistance values adjusting branch road are set in advance, error would not be produced when adjusting, more convenient.
Further, described inductive element is set to inductance.Play energy storage effect.
Further, described inductive element is set to transformator.Play energy storage and the effect of isolation.
Further, in the described described adjusting resistance values difference adjusting branch road of difference.
Further, it has been also coupled to divider resistance between the source electrode of described metal-oxide-semiconductor and described feedback pin.
Further, it is in series with protection branch road between the source electrode of described metal-oxide-semiconductor and ground terminal, described protection branch road is provided with guarantor
Shield resistance.
Beneficial effect：Because using above technical scheme, this utility model, on the power supply of same power grade, can be adjusted
Section keeps off output current so as to the LED using in the case of adaptation is multiple, it is ensured that driving stable, avoids manual operation by mistake simultaneously
Difference, reduces design cost and production cost.
Brief description
Fig. 1 is LED drive circuit schematic diagram in prior art；
Fig. 2 is LED drive circuit schematic diagram of the present invention.
Reference：1st, primary side feedback IC；2nd, metal-oxide-semiconductor；3rd, adjust branch road；31st, switch element；4th, protect branch road；5th, feel
Property element.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making the premise of creative work
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can
To be mutually combined.
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as of the present utility model
Limit.
With reference to Fig. 2, a kind of adjustable LED drive circuit of output current, including primary side feedback constant current chip, inductive element 5
And metal-oxide-semiconductor 2, described primary side feedback constant current chip includes a feedback pin and an output pin, and described output pin couples
The grid of metal-oxide-semiconductor 2, missing of described metal-oxide-semiconductor 2 couples inductive element 5, couples between the source electrode of described metal-oxide-semiconductor 2 and feedback pin
There is the regulation branch road 3 of at least two groups of settings parallel with one another, described one end adjusting branch road 3 is coupled to feedback pin, another termination
Ground；Described regulation branch road 3 includes being arranged in series switch element 31 and adjusts resistance RA0-RAX, and described switch element 31 includes jumping
Line cap, first row stitch and second row stitch, described first row stitch connects feedback pin, and described second row stitch connects regulation
Resistance, described jumper cap is used for realizing the electrical connection between first row stitch and second row stitch.The regulation of different adjustment branch road 3
Resistance is different.Described inductive element 5 is set to inductance.Play energy storage effect.The source electrode of described metal-oxide-semiconductor 2 and feedback pin
Between be also coupled to divider resistance R2.It is in series with protection branch road 4, described protection branch road between the source electrode of described metal-oxide-semiconductor 2 and ground terminal
4 are provided with protective resistance R1.
Arranged by such, first, adjust the node location that branch road 3 connects, any one adjusts resistance accesses feedback pin,
The resistance adjusting branch road 3 will be changed, and change the output voltage of primary side feedback constant current chip；And user only needs to wire jumper
Cap is plugged on the connection that just can complete this branch road between the first header pin and the second header pin, and circuit small volume,
To operate more convenient simultaneously, thus can adjust resistance thus adjusting output current according to actual service rating, and only use
Respectively each adjusting resistance values adjusting branch road 3 are set in advance, error would not be produced when adjusting, more just
Profit.
Embodiment 2, the described inductive element 5 of embodiment 1 is set to transformator.Play energy storage and the effect of isolation.
The foregoing is only this utility model preferred embodiment, not thereby limit embodiment of the present utility model and
Protection domain, to those skilled in the art it should can appreciate that in all utilization this utility model description and diagram
Scheme obtained by holding done equivalent and obviously changing, all should be included in protection model of the present utility model
In enclosing.
Claims (6)
1. the adjustable LED drive circuit of a kind of output current, including primary side feedback constant current chip, inductive element and metal-oxide-semiconductor, institute
State primary side feedback constant current chip and include a feedback pin and an output pin, described output pin couples the grid of metal-oxide-semiconductor, institute
State missing of metal-oxide-semiconductor and couple inductive element it is characterised in that being coupled with least between the source electrode of described metal-oxide-semiconductor and feedback pin
The regulation branch road of two groups of settings parallel with one another, one end of described regulation branch road is coupled to described feedback pin, and the other end is grounded；Institute
State regulation branch road to include being arranged in series switch element and adjust resistance, described switch element include jumper cap, first row stitch and
Second row stitch, described first row stitch connects described feedback pin, and described second row stitch connects described regulation resistance, described
Jumper cap is used for realizing the electrical connection between described first row stitch and described second row stitch.
2. a kind of adjustable LED drive circuit of output current according to claim 1 is it is characterised in that described perception unit
Part is set to inductance.
3. a kind of adjustable LED drive circuit of output current according to claim 1 is it is characterised in that described perception unit
Part is set to transformator.
4. a kind of adjustable LED drive circuit of output current according to claim 1 is it is characterised in that in described in difference
The described adjusting resistance values adjusting branch road are different.
5. the adjustable LED drive circuit of a kind of output current according to claim 1 is it is characterised in that described metal-oxide-semiconductor
It has been also coupled to divider resistance between source electrode and described feedback pin.
6. the adjustable LED drive circuit of a kind of output current according to claim 1 is it is characterised in that described metal-oxide-semiconductor
It is in series with protection branch road, described protection branch road is provided with protective resistance between source electrode and ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621004512.6U CN206004953U (en) | 2016-08-31 | 2016-08-31 | A kind of adjustable LED drive circuit of output current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621004512.6U CN206004953U (en) | 2016-08-31 | 2016-08-31 | A kind of adjustable LED drive circuit of output current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206004953U true CN206004953U (en) | 2017-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621004512.6U Expired - Fee Related CN206004953U (en) | 2016-08-31 | 2016-08-31 | A kind of adjustable LED drive circuit of output current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206004953U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426878A (en) * | 2017-08-28 | 2017-12-01 | 盐城莱廷绍工业技术有限公司 | A kind of drive circuit that LED output currents are selected by jack |
-
2016
- 2016-08-31 CN CN201621004512.6U patent/CN206004953U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426878A (en) * | 2017-08-28 | 2017-12-01 | 盐城莱廷绍工业技术有限公司 | A kind of drive circuit that LED output currents are selected by jack |
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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: 20170308 Termination date: 20200831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |