CN206461803U - Constant current driver circuit for LED - Google Patents
Constant current driver circuit for LED Download PDFInfo
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- CN206461803U CN206461803U CN201621403042.0U CN201621403042U CN206461803U CN 206461803 U CN206461803 U CN 206461803U CN 201621403042 U CN201621403042 U CN 201621403042U CN 206461803 U CN206461803 U CN 206461803U
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Abstract
The utility model provides constant current driver circuit for LED, it includes commutation diode, wherein, pin a, the pin c of commutation diode are connected with power supply, the pin b of commutation diode is connected after being connected with first electric capacity one end with the colelctor electrode of triode, the pin d of commutation diode is connected after being connected with the first electric capacity other end with light emitting diode one end, the emitter stage of triode is connected with second resistance one end, and the second resistance other end is connected with voltage-regulator diode, second electric capacity one end and the light emitting diode other end in parallel respectively；Base stage of voltage-regulator diode, the second electric capacity other end in parallel respectively with first resistor one end and triode is connected, and the first resistor other end is connected with first electric capacity one end.After this programme, electric current is stable, can greatly prolong the LED luminous time limit and life-span.
Description
Technical field
The utility model is related to field of LED drive technology, refers in particular to constant current driver circuit for LED.
Background technology
LED is the sensitive semiconductor devices of characteristic, has negative temperature characteristic again, thus needs to enter it in application process
Row steady-working state and protection.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of electric current stabilization, can greatly prolonged
The constant current driver circuit for LED in luminous time limit and life-span.
To achieve the above object, technical scheme provided by the utility model is：Constant current driver circuit for LED, it includes
Commutation diode, the first electric capacity, the second electric capacity, triode, wherein, pin a, the pin c of commutation diode are connected with power supply, whole
Stream diode pin b be connected with first electric capacity one end after be connected with the colelctor electrode of triode, the pin d of commutation diode and
It is connected after the connection of the first electric capacity other end with light emitting diode one end, the emitter stage of triode is connected with second resistance one end
Connect, the second resistance other end is connected with voltage-regulator diode, second electric capacity one end and the light emitting diode other end in parallel respectively
Connect；Base stage of voltage-regulator diode, the second electric capacity other end in parallel respectively with first resistor one end and triode is connected, the
The one resistance other end is connected with first electric capacity one end.
Described light emitting diode is multiple for series connection.
First, second resistance of the present utility model uses 80 Ω resistance, and the first electric capacity is 400V, 10 μ F；Second electricity
Appearance uses 16V, 100 μ F；Voltage-regulator diode is 2V, and after using such scheme, LED passes through commutation diode, voltage-regulator diode
Rectification after, electric current is stable, can greatly prolong the LED luminous time limit and life-span.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Embodiment
With reference to all accompanying drawings, the utility model is described in further detail, and preferred embodiment of the present utility model is：Ginseng
See accompanying drawing 1, the constant current driver circuit for LED described in the present embodiment includes commutation diode BD, the first electric capacity C1, the second electric capacity
C2, triode Q1, wherein, commutation diode BD pin a, pin c are connected with power supply, commutation diode BD pin b and
It is connected after the connection of one electric capacity C1 one end with triode Q1 colelctor electrode, commutation diode BD pin d and the first electric capacity C1 are another
It is connected after the connection of one end with LED one end, described LED is multiple, the triode Q1 of series connection
Emitter stage be connected with second resistance R2 one end, the second resistance R2 other ends respectively with voltage-regulator diode D1 in parallel, second
Electric capacity C2 one end and the LED other end are connected；The other end point voltage-regulator diode D1, the second electric capacity C2 in parallel
Base stage not with first resistor R1 one end and triode Q1 is connected, the first resistor R1 other ends and first electric capacity C1 one end phase
Connection.First, second resistance of the present embodiment uses 80 Ω resistance, and the first electric capacity is 400V, 10 μ F；Second electric capacity is adopted
With 16V, 100 μ F；Voltage-regulator diode is 2V, using after above-described embodiment, and LED passes through commutation diode, voltage-regulator diode
After rectification, electric current is stable, can greatly prolong the LED luminous time limit and life-span.
Embodiment described above is only the preferred embodiment of the utility model, not limits reality of the present utility model with this
Apply scope, therefore the change that all shape, principles according to the utility model are made, it all should cover in protection domain of the present utility model
It is interior.
Claims (2)
1.LED constant-current drive circuits, it is characterised in that：It includes commutation diode（BD）, the first electric capacity（C1）, the second electric capacity
（C2）, triode（Q1）, wherein, commutation diode（BD）Pin a, pin c be connected with power supply, commutation diode（BD）Draw
Pin b and the first electric capacity（C1）With triode after the connection of one end（Q1）Colelctor electrode be connected, commutation diode（BD）Pin d with
First electric capacity（C1）With light emitting diode after other end connection（LED）One end is connected, triode（Q1）Emitter stage and second
Resistance（R2）One end is connected, second resistance（R2）The other end respectively with voltage-regulator diode in parallel（D1）, the second electric capacity（C2）
One end and light emitting diode（LED）The other end is connected；Voltage-regulator diode（D1）, the second electric capacity（C2）The other end point in parallel
Not and first resistor（R1）One end and triode（Q1）Base stage be connected, first resistor（R1）The other end and the first electric capacity
（C1）One end is connected.
2. constant current driver circuit for LED according to claim 1, it is characterised in that：Light emitting diode（LED）For many of series connection
It is individual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621403042.0U CN206461803U (en) | 2016-12-21 | 2016-12-21 | Constant current driver circuit for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621403042.0U CN206461803U (en) | 2016-12-21 | 2016-12-21 | Constant current driver circuit for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206461803U true CN206461803U (en) | 2017-09-01 |
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ID=59696684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621403042.0U Active CN206461803U (en) | 2016-12-21 | 2016-12-21 | Constant current driver circuit for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206461803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032103A (en) * | 2019-04-09 | 2019-07-19 | 广西俊锦科技有限公司 | Intelligent building monitoring system |
-
2016
- 2016-12-21 CN CN201621403042.0U patent/CN206461803U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032103A (en) * | 2019-04-09 | 2019-07-19 | 广西俊锦科技有限公司 | Intelligent building monitoring system |
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