CN205081557U - LED lamp emergency power supply circuit - Google Patents
LED lamp emergency power supply circuit Download PDFInfo
- Publication number
- CN205081557U CN205081557U CN201520276250.8U CN201520276250U CN205081557U CN 205081557 U CN205081557 U CN 205081557U CN 201520276250 U CN201520276250 U CN 201520276250U CN 205081557 U CN205081557 U CN 205081557U
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- China
- Prior art keywords
- module
- lithium battery
- supply circuit
- led
- boost module
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Abstract
The utility model discloses a LED lamp emergency power supply circuit, include: AC -DC conversion module, DC -DC boost module, lithium battery protection module, switching circuit module, constant current boost module. The AC -DC conversion module output is connected with the DC -DC boost module input, and the DC -DC boost module output is connected with lithium battery protection module input, and lithium cell input module output is connected with switching circuit module input, and the switching circuit output is connected with constant current boost module input, and constant current boost module output is connected with the LED banks. The utility model discloses LED lamp emergency power supply circuit can be under the condition of commercial power outage, and the automatic switch -over is self lithium cell group power supply, keeps LED banks normal lighting under the condition of commercial power outage.
Description
Technical field
The utility model relates to ligthing paraphernalia, particularly relates to a kind of LED emergency supply circuit.
Background technology
LED as a kind of novel solid lighting source, because of its good energy saving, longer useful life, gradually for multiple illumination.But when civil power power-off, circuit often can not be fixed at once, for daily life is made troubles, even causes traffic accident.So just make the emergency service function of LED lamp more and more important, especially in some public arenas, keep certain brightness, the safety that can be convenient for people to.
Utility model content
When the utility model overcomes civil power power-off, the shortcoming that LED lamp can not be powered at once.When civil power power-off, lithium battery power supply can be switched to, provide the time for workman repairs circuit, and ensure that the normal safety of people.
For realizing above technical purpose, the scheme that the utility model adopts is:
A kind of LED emergency supply circuit, comprises AC-DC conversion module, DC-DC boost module, li-ion cell protection, commutation circuit module, constant current boost module.AC-DC conversion module output is connected with DC-DC boost module input; DC-DC boost module output is connected with lithium battery protection module input; lithium battery input module output is connected with commutation circuit module input; commutation circuit output is connected with constant current boost module input, and constant current boost module output is connected with LED group.
Wherein, described AC-DC conversion module adopts bridge rectifier circuit and 7812 voltage stabilizing chips, to ensure being stable 12V direct voltage by voltage transitions.
Wherein, described DC-DC boost module adopts LM-2577 boost chip, the direct voltage of 12V can be risen to 16V, to charge to lithium battery group.
Wherein, described lithium battery protection module adopts S-8204B Li battery protection IC, this chip can play lithium battery overcharge, overcurrent, Cross prevention, in order to avoid lithium battery damages when charge and discharge.
Wherein, described constant current boost module adopts LM3404 constant current boost chip, and the direct current of 16V can be risen to the Constant Electric Current that electric current is 0.7A by this chip, for LED group provides constant-current supply.
The beneficial effects of the utility model are: by commutation circuit, when civil power power-off, can automatically switch to lithium battery group and power.Thering is provided constant-current supply by constant current boost module for LED group, is that LED group has stable brightness.Lithium battery group can be protected not overcharge by lithium battery protection circuit, cross put, the accident such as overcurrent, postpone lithium battery group useful life.
Accompanying drawing explanation
Fig. 1 is the utility model LED emergency supply circuit schematic diagram.
Fig. 2 is the whole circuit diagram of the utility model LED emergency supply circuit.
Fig. 3 is the AC-DC conversion module of the utility model LED emergency supply circuit.
Fig. 4 is the DC-DC boost module of the utility model LED emergency supply circuit.
Fig. 5 is the commutation circuit module of the utility model LED emergency supply circuit.
Fig. 6 is the constant current boost module of the utility model LED emergency supply circuit.
Fig. 7 is the lithium battery protection module of the utility model LED emergency supply circuit.
Embodiment
The technical solution of the utility model is further illustrated by execution mode below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of a kind of LED emergency supply circuit of the utility model.
A kind of LED emergency supply circuit, comprises AC-DC conversion module, DC-DC boost module, li-ion cell protection, commutation circuit module, constant current boost module.AC-DC conversion module output is connected with DC-DC boost module input; DC-DC boost module output is connected with lithium battery protection module input; lithium battery protection module output is connected with commutation circuit module input; commutation circuit output is connected with constant current boost module input, and constant current boost module output is connected with LED group.
Fig. 2 is the whole circuit diagram of a kind of LED of the utility model emergency supply circuit.
Fig. 3 is the AC-DC conversion module circuit of a kind of LED emergency supply circuit of the utility model, mainly comprises shaping electric bridge and 7812 voltage stabilizing chips, and its effect 220V alternating current is converted to the stable delay of 12V.
Fig. 4 is the DC-DC boost module of a kind of LED emergency supply circuit of the utility model, be LM-2577 chip circuit, its effect is that 12V direct current is risen to 16V.
Fig. 5 is the lithium battery protection module of a kind of LED emergency supply circuit of the utility model, be S-8204B chip circuit, its effect be protection lithium battery group do not overcharged, cross put, overcurrent damage.
Fig. 6 is the commutation circuit module of a kind of LED emergency supply circuit of the utility model, and its effect is when civil power is without electricity, is automatically switched to by circuit lithium battery group to power.
Fig. 7 is the constant current boost module of a kind of LED emergency supply circuit of the utility model, be LM3404 chip circuit, its effect is for LED group provides constant-current supply.
In a particular application, certain LED group needs 48V stable DC voltage or 700mA constant-current supply to power, 220V alternating current is converted to the stable DC electricity of 12V by the utility model LED emergency supply circuit by AC-DC conversion module, the direct voltage of 12V rises to 16V by DC-DC boost module, to be the charging of lithium battery group, lithium battery group and civil power are connected in commutation circuit jointly, be that LED group is powered when civil power has electricity by LED group own power source, when civil power is without electricity, lithium battery group is switched to power in circuit by commutation circuit module.When lithium battery group is powered, lithium battery group by constant current boost module for LED group provides the constant-current supply of 700mA.
The utility model LED emergency supply circuit, by commutation circuit, when civil power power-off, can automatically switch to lithium battery group and powers.Thering is provided constant-current supply by constant current boost module for LED group, is that LED group has stable brightness.Lithium battery group can be protected not overcharge by lithium battery protection circuit, cross put, the accident such as overcurrent, postpone lithium battery group useful life.
Below know-why of the present utility model is described in conjunction with specific embodiments.These describe just in order to explain principle of the present utility model, and can not be interpreted as the restriction to the utility model protection range by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, and these modes all will fall within protection range of the present utility model.
Claims (7)
1. a LED emergency supply circuit, is characterized in that, described a kind of LED emergency supply circuit comprises: AC-DC conversion module, DC-DC boost module, lithium battery protection module, commutation circuit module, constant current boost module; AC-DC conversion module output is connected with DC-DC boost module input; DC-DC boost module output is connected with lithium battery protection module input; lithium battery input module output is connected with commutation circuit module input; commutation circuit output is connected with constant current boost module input, and constant current boost module output is connected with LED group.
2. a kind of LED emergency supply circuit according to claim 1, is characterized in that: AC-DC conversion module adopts bridge rectifier circuit and 7812 voltage stabilizing chips, to ensure being stable 12V direct voltage by voltage transitions.
3. a kind of LED emergency supply circuit according to claim 1, is characterized in that: DC-DC boost module adopts LM-2577 boost chip, the direct voltage of 12V can be risen to 16V, to give lithium cell charging.
4. a kind of LED emergency supply circuit according to claim 1; it is characterized in that: lithium battery protection module adopts S-8204B Li battery protection IC; this chip can play lithium battery overcharge, overcurrent, Cross prevention, in order to avoid lithium battery damages when charge and discharge.
5. a kind of LED emergency supply circuit according to claim 1, is characterized in that: the core of commutation circuit module is PMOS, and this circuit when civil power is without electricity, can switch to lithium battery power supply at once.
6. a kind of LED emergency supply circuit according to claim 1, it is characterized in that: constant current boost module adopts LM3404 constant current boost chip, the DC power supply of 16V can be risen to the constant-current supply that electric current is 0.7A by this chip, for LED group provides constant-current supply.
7. a kind of LED emergency supply circuit according to claim 1, is characterized in that: the emergency service power supply of the utility model circuit is lithium battery group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276250.8U CN205081557U (en) | 2015-04-30 | 2015-04-30 | LED lamp emergency power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276250.8U CN205081557U (en) | 2015-04-30 | 2015-04-30 | LED lamp emergency power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205081557U true CN205081557U (en) | 2016-03-09 |
Family
ID=55433931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520276250.8U Expired - Fee Related CN205081557U (en) | 2015-04-30 | 2015-04-30 | LED lamp emergency power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205081557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230097A (en) * | 2016-07-19 | 2016-12-14 | 合肥联信电源有限公司 | Emergency power system concentrated by a kind of safe voltage type |
-
2015
- 2015-04-30 CN CN201520276250.8U patent/CN205081557U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230097A (en) * | 2016-07-19 | 2016-12-14 | 合肥联信电源有限公司 | Emergency power system concentrated by a kind of safe voltage type |
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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: 20160309 Termination date: 20160430 |