CN105792474B - A kind of Width funtion AC driving circuit for LED power - Google Patents
A kind of Width funtion AC driving circuit for LED power Download PDFInfo
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- CN105792474B CN105792474B CN201510818770.1A CN201510818770A CN105792474B CN 105792474 B CN105792474 B CN 105792474B CN 201510818770 A CN201510818770 A CN 201510818770A CN 105792474 B CN105792474 B CN 105792474B
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Abstract
The present invention provides a kind of Width funtion AC driving circuit for LED power, including：Rectification circuit, for by output ripple direct current after AC rectification；The DC output end connection of voltage-dividing detection circuit, one end and rectification circuit, the other end are connected to the base stage of first switch pipe Q1；The DC output end connection of reduction voltage circuit, one end and rectification circuit, the other end are connected to the base stage of second switch pipe Q2；Serial and parallel switching circuit, one end are connect with the emitter of first switch pipe Q1 and second switch pipe Q2, and the other end is connect with two groups of constant-current drive circuits；When input AC electricity is low-voltage, first switch pipe Q1 conductings, second switch pipe Q2 cut-offs；Two groups of constant-current drive circuits are switched to and are connected in parallel by serial and parallel switching circuit；When input AC electricity is high voltage, second switch pipe Q2 conductings, first switch pipe Q1 cut-offs；Two groups of constant-current drive circuits are switched to and are connected in series with by serial and parallel switching circuit.
Description
Technical field
The present invention relates to a kind of LED power driving circuit more particularly to a kind of Width funtion exchanges for LED power
Driving circuit.
Background technology
DoB (DriveronBoard) or Driverless, that is, our usually said " going " power supplys, in fact not
It is non-transformer, but a kind of new type of drive for being different from traditional switch power supply, it is one derived from based on LED characteristics
The new type of drive of kind.It for intelligent lighting, is driven compared to traditional Switching Power Supply, linear IC drivings have the congenital excellent of it
Gesture.Conventional power source can also realize intelligent lighting, but the cost or the cost of the system integration paid are far more than linear.
In conclusion no matter from stability, safety, performance parameter and it is of high cost from the point of view of, the linear IC of DoB are a kind of high property
Valency than LED drive schemes.Lamps and lanterns using DoB power source designs are carrying out north america safety certification, such as during UL certifications, electricity
Source only needs lamps and lanterns finished product to greatly save certification cost by certification and shorten authentication period without independent certification.
Invention content
Technical problem underlying to be solved by this invention is to provide a kind of Width funtion exchange driving electricity for LED power
Road can be suitable for the voltage environment of 100V-528V, and eliminate traditional constant-current driving power supply, reduce small product size,
Simplify technique.
In order to solve above-mentioned volume technical problem, the present invention provides a kind of Width funtion exchange driving electricity for LED power
Road, including：
Rectification circuit, for by output ripple direct current after AC rectification；
Voltage-dividing detection circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to first and opens
Close the base stage of pipe Q1；
Reduction voltage circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to second switch pipe
The base stage of Q2；
Serial and parallel switching circuit, one end are connect with the emitter of the first switch pipe Q1 and second switch pipe Q2, separately
One end is connect with two groups of constant-current drive circuits；
When input AC electricity is low-voltage, the first switch pipe Q1 conductings, second switch pipe Q2 cut-offs；Connection in series-parallel is cut
It changes circuit and is switched to two groups of constant-current drive circuits and be connected in parallel；
When input AC electricity is high voltage, the second switch pipe Q2 conductings, first switch pipe Q1 cut-offs；Connection in series-parallel is cut
It changes circuit and is switched to two groups of constant-current drive circuits and be connected in series with.
In a preferred embodiment：The serial and parallel switching circuit includes a relay, including being controlled by two groups of coils
The first movable switch J1A and the second movable switch JIB；When the first switch pipe Q1 is connected, relay work；When described
When second switch pipe Q2 is connected, relay does not work.
In a preferred embodiment：The normally opened contact of the first movable switch J1A is normally closed with the second movable switch J1B's
Contact portion；The normally opened contact of the second movable switch J1B is connect with the DC output end of the rectification circuit.
In a preferred embodiment：Its input terminal of the first constant-current drive circuit and institute in two groups of constant-current drive circuits
State rectification circuit DC output end connection, output terminal respectively with the normally opened contact of the first movable switch J1A, the second movable switch
The normally-closed contact connection of J1B.
In a preferred embodiment：Its input terminal of the second constant-current drive circuit and institute in two groups of constant-current drive circuits
State the normally-closed contact connection of the second movable switch J1B, output terminal ground connection.
In a preferred embodiment：The voltage-dividing detection circuit includes R1, RV1, RV2, RV3 for being connected in series with；Wherein RI
For resistance, RV1, RV2, RV3 are varistor or voltage-stabiliser tube.
In a preferred embodiment：The reduction voltage circuit includes resistance R3, R4, R11 for being connected in series with.
In a preferred embodiment：The constant-current drive circuit includes linear constant current IC, powers for LED module.
In a preferred embodiment：The AC driving circuit shares a piece of aluminum substrate with LED chip.
Compared to the prior art, technical scheme of the present invention has following advantageous effect：
1. the present invention provides a kind of Width funtion AC driving circuit for LED power, by the way that connection in series-parallel is set to switch
Circuit so that two constant-current drive circuits are series connection in high voltage, and two constant-current drive circuits are parallel connection during low-voltage
State.Therefore, constant-current drive circuit can work normally under conditions of high pressure and low pressure, specifically, can be in 100V-
The voltage range normal work of 528V.The household voltage of most countries in the world is can adapt to, has broad applicability.
2. the present invention provides a kind of Width funtion AC driving circuit for LED power, conventional lamp use is eliminated
Constant-current driving power supply, be changed to linear constant current IC drivings, entire circuit and LED chip can be sitting in a piece of aluminum substrate jointly
On, small product size is reduced, simplifies technique.
Description of the drawings
Fig. 1 is the circuit diagram of Width funtion AC driving circuit in the preferred embodiment of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
With reference to figure 1, a kind of Width funtion AC driving circuit for LED power, including：
Rectification circuit, in the present embodiment, the rectification circuit is bridge rectifier.Alternating current passes through fuse, enters
Output ripple direct current after rectifier bridge stack D1-D4；
Voltage-dividing detection circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to first and opens
Close the base stage of pipe Q1；The voltage-dividing detection circuit includes R1, RV1, RV2, RV3 for being connected in series with；Wherein RI be resistance, RV1,
RV2, RV3 are varistor or voltage-stabiliser tube.When the voltage of the direct current is relatively low, which can not after R1 is depressured
RV1, RV2, RV3 are punctured, therefore the both ends of pull down resistor R2 can not obtain voltage, first switch pipe Q1 cut-offs.When described straight
When the voltage of galvanic electricity is higher, which punctures RV1, RV2, RV3 after R1 is depressured, therefore the both ends of pull down resistor R2
Obtain voltage, first switch pipe Q1 conductings.
Reduction voltage circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to second switch pipe
The base stage of Q2；The reduction voltage circuit includes resistance R3, R4, R11 for being connected in series with.When first switch pipe Q1 ends, the direct current
Electricity acts on the base stage of second switch pipe Q2, second switch pipe Q2 conductings by decompression network.When first switch pipe Q1 is connected,
Second switch pipe ends.
Serial and parallel switching circuit, one end are connect with the emitter of the first switch pipe Q1 and second switch pipe Q2, separately
One end is connect with two groups of constant-current drive circuits；
When input AC electricity is low-voltage, the first switch pipe Q1 conductings, second switch pipe Q2 cut-offs；Connection in series-parallel is cut
It changes circuit and is switched to two groups of constant-current drive circuits and be connected in parallel；
When input AC electricity is high voltage, the second switch pipe Q2 conductings, first switch pipe Q1 cut-offs；Connection in series-parallel is cut
It changes circuit and is switched to two groups of constant-current drive circuits and be connected in series with.
In order to realize above-mentioned switching mode, the serial and parallel switching circuit includes a relay, including by two groups of lines
Enclose the first movable switch J1A and the second movable switch JIB of control.When the first switch pipe Q1 is connected, relay work；
When the second switch pipe Q2 is connected, relay does not work.
The normally opened contact of the first movable switch J1A is connect with the normally-closed contact of the second movable switch J1B；Described second
The normally opened contact of movable switch J1B is connect with the DC output end of the rectification circuit.
The direct current of its input terminal of the first constant-current drive circuit and the rectification circuit in two groups of constant-current drive circuits
Output terminal connects, and output terminal connects respectively with the normally-closed contact of the normally opened contact of the first movable switch J1A, the second movable switch J1B
It connects.
Its input terminal of the second constant-current drive circuit and the second movable switch J1B in two groups of constant-current drive circuits
Normally-closed contact connection, output terminal ground connection.
After having used above-mentioned setting, when input AC electricity is low-voltage state, first switch pipe Q1 cut-offs, second switch
Pipe Q2 is connected, the relay work.Therefore the normally opened contact of the first movable switch J1A is closed, and the second movable switch J1B's is normal
Open contact closure.The direct current of the rectification circuit output is divided into two-way, all the way from first after the first constant-current drive circuit
The normally opened contact ground connection of movable switch J1A；The normally opened contact of another way from the second movable switch J1B are electric by the second constant current driving
It is grounded behind road；Therefore, at low voltage, the first constant-current drive circuit and the second constant-current drive circuit are in parallel connection.
And when input AC electricity be high-voltage state when, first switch pipe Q1 conducting, second switch pipe Q2 cut-off, it is described after
Electric appliance does not work.Therefore the normally-closed contact of the first movable switch J1A is closed, and the normally-closed contact of the second movable switch J1B is closed.Institute
The direct current for stating rectification circuit output inputs after the first constant-current drive circuit after the normally-closed contact of the second movable switch J1B
It is grounded after second constant-current drive circuit；Therefore, in high voltage, the first constant-current drive circuit and the second constant-current drive circuit are in
Series connection.
Above-mentioned a kind of Width funtion AC driving circuit for LED power, by setting serial and parallel switching circuit so that
In high voltage, two constant-current drive circuits are series connection, and two constant-current drive circuits are parallel connection during low-voltage.Therefore,
Constant-current drive circuit can work normally under conditions of high pressure and low pressure, specifically, can be in the voltage zone of 120V-528V
Between work normally.The household voltage of most countries in the world is can adapt to, has broad applicability.
In the present embodiment, the constant-current drive circuit includes linear constant current IC, powers for LED module.So eliminate biography
Entire circuit and LED chip can jointly be sitting on a piece of aluminum substrate, reduce production by the constant-current driving power supply that system lamps and lanterns use
Product volume, simplifies technique.
The above, only present pre-ferred embodiments do not limit the range of the invention implemented, skill under this invention with this
The equivalent changes and modifications that art scheme and description are made should all belong to the range that the present invention covers.
Claims (9)
1. a kind of Width funtion AC driving circuit for LED power, it is characterised in that including：
Rectification circuit, for by output ripple direct current after AC rectification；
Voltage-dividing detection circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to first switch pipe
The base stage of Q1；
Reduction voltage circuit, one end are connect with the DC output end of the rectification circuit, and the other end is connected to second switch pipe Q2's
Base stage；
Serial and parallel switching circuit, one end are connect with the emitter of the first switch pipe Q1 and second switch pipe Q2, the other end
It is connect with two groups of constant-current drive circuits；
When input AC electricity is low-voltage, the first switch pipe Q1 conductings, second switch pipe Q2 cut-offs；Connection in series-parallel switching electricity
Two groups of constant-current drive circuits are switched to and are connected in parallel by road；
When input AC electricity is high voltage, the second switch pipe Q2 conductings, first switch pipe Q1 cut-offs；Connection in series-parallel switching electricity
Two groups of constant-current drive circuits are switched to and are connected in series with by road.
2. a kind of Width funtion AC driving circuit for LED power according to claim 1, it is characterised in that：It is described
Serial and parallel switching circuit includes a relay, and the first movable switch J1A and the second activity including being controlled by two groups of coils are opened
Close JIB；When the first switch pipe Q1 is connected, relay work；When the second switch pipe Q2 is connected, relay not work
Make.
3. a kind of Width funtion AC driving circuit for LED power according to claim 2, it is characterised in that：It is described
The normally opened contact of first movable switch J1A is connect with the normally-closed contact of the second movable switch J1B；The second movable switch J1B
Normally opened contact connect with the DC output end of the rectification circuit.
4. a kind of Width funtion AC driving circuit for LED power according to claim 3, it is characterised in that：It is described
The first constant-current drive circuit its input terminal in two groups of constant-current drive circuits is connect with the DC output end of the rectification circuit, defeated
Normally-closed contact of the outlet respectively with the normally opened contact of the first movable switch J1A, the second movable switch J1B is connect.
5. a kind of Width funtion AC driving circuit for LED power according to claim 4, it is characterised in that：It is described
Its input terminal of the second constant-current drive circuit and the normally-closed contact of the second movable switch J1B in two groups of constant-current drive circuits connect
It connects, output terminal ground connection.
6. a kind of Width funtion AC driving circuit for LED power according to claim 1, it is characterised in that：It is described
Voltage-dividing detection circuit includes R1, RV1, RV2, RV3 for being connected in series with；Wherein RI is resistance, RV1, RV2, RV3 for varistor or
Voltage-stabiliser tube.
7. a kind of Width funtion AC driving circuit for LED power according to claim 1, it is characterised in that：It is described
Reduction voltage circuit includes resistance R3, R4, R11 for being connected in series with.
8. a kind of Width funtion AC driving circuit for LED power according to claim 1, it is characterised in that：It is described
Constant-current drive circuit includes linear constant current IC, powers for LED module.
9. a kind of Width funtion AC driving circuit for LED power according to any one of claim 1-8, feature
It is：The AC driving circuit shares a piece of aluminum substrate with LED chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510818770.1A CN105792474B (en) | 2015-11-23 | 2015-11-23 | A kind of Width funtion AC driving circuit for LED power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510818770.1A CN105792474B (en) | 2015-11-23 | 2015-11-23 | A kind of Width funtion AC driving circuit for LED power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105792474A CN105792474A (en) | 2016-07-20 |
| CN105792474B true CN105792474B (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510818770.1A Expired - Fee Related CN105792474B (en) | 2015-11-23 | 2015-11-23 | A kind of Width funtion AC driving circuit for LED power |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686827B (en) * | 2017-02-10 | 2019-01-04 | 深圳创维照明电器有限公司 | A kind of LED lamp and its Width funtion input driving circuit |
| CN212910138U (en) * | 2020-05-06 | 2021-04-06 | 广东微观科技有限公司 | High-voltage lamp band harmonic control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826366A (en) * | 2014-02-24 | 2014-05-28 | 上海亚明照明有限公司 | High-voltage LED driving circuit capable of working under full voltages |
| CN103929866A (en) * | 2014-05-07 | 2014-07-16 | 上海亚明照明有限公司 | High-voltage LED drive circuit capable of working at full voltage |
| CN205249550U (en) * | 2015-11-23 | 2016-05-18 | 厦门兴恒隆股份有限公司 | A width voltage AC drive circuit for LED power |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5645109B2 (en) * | 2010-07-27 | 2014-12-24 | パナソニックＩｐマネジメント株式会社 | Two-wire load control device |
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2015
- 2015-11-23 CN CN201510818770.1A patent/CN105792474B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826366A (en) * | 2014-02-24 | 2014-05-28 | 上海亚明照明有限公司 | High-voltage LED driving circuit capable of working under full voltages |
| CN103929866A (en) * | 2014-05-07 | 2014-07-16 | 上海亚明照明有限公司 | High-voltage LED drive circuit capable of working at full voltage |
| CN205249550U (en) * | 2015-11-23 | 2016-05-18 | 厦门兴恒隆股份有限公司 | A width voltage AC drive circuit for LED power |
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| CN105792474A (en) | 2016-07-20 |
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