CN207074865U - A kind of LED emergency power supplies charging sample circuit - Google Patents
A kind of LED emergency power supplies charging sample circuit Download PDFInfo
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- CN207074865U CN207074865U CN201720466700.9U CN201720466700U CN207074865U CN 207074865 U CN207074865 U CN 207074865U CN 201720466700 U CN201720466700 U CN 201720466700U CN 207074865 U CN207074865 U CN 207074865U
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Abstract
The utility model discloses a kind of LED emergency power supplies charging sample circuit, including：Transformer secondary output,Diode,Voltage-stabiliser tube,Triode,First resistor,Second resistance,LED,Mu balanced circuit,Emergency circuit,Anode end and GND end,The positive pole of the diode is connected with an output end of the transformer secondary output,Its negative pole one end with first resistor respectively,The emitter stage of triode,The negative pole connection of voltage-stabiliser tube,The other end of the first resistor base stage with triode respectively,One end of emergency circuit and the connection of anode end,The positive pole of voltage-stabiliser tube one end with second resistance respectively,The colelctor electrode connection of triode,The other end of the second resistance is connected with one end of the LED,The other end of the LED is connected with described mu balanced circuit one end,The other end of the mu balanced circuit another output end with transformer secondary output respectively,The other end and the GND connection of emergency circuit.
Description
Technical field
It the utility model is related to technical field of LED illumination, more particularly to a kind of LED emergency power supplies charging sample circuit.
Background technology
LED (Lighting Emitting Diode) is illuminated, i.e. LED lighting, is a kind of semiconducting solid hair
Optical device.It is by the use of solid semiconductor chip as luminescent material, and compound released occurs by carrier in the semiconductors
Surplus energy and cause photon to be launched, directly send red, yellow, blue, green light, on this basis, using the principle of three primary colours, add
Add fluorescent material, the light of the random color such as red, yellow, blue, green, blue or green, orange, purple, white can be sent.In LED illumination device often
Provided with emergency power supply to tackle special circumstances, at present, in the circuit to be charged to the battery of emergency power supply, current sampling (sampling
Resistance R100) negative terminal of battery is all placed on to control mu balanced circuit, as shown in figure 1, so as to reach constant-current charging of battery.If
Emergency circuit 100 needs to sample the voltage signal that transformer comes out and does the control of other circuits, the voltage on sample resistance R100
It can be superimposed upon on sampled signal, cause sampled signal inaccurate, cause emergency circuit 100 to work abnormal.
Therefore, the prior art is defective, it is necessary to improve.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of LED emergency power supplies charging sample circuit.
The technical solution of the utility model is as follows：The utility model provides a kind of LED emergency power supplies charging sample circuit, bag
Include：Transformer secondary output, diode, voltage-stabiliser tube, triode, first resistor, second resistance, LED, mu balanced circuit, should
Urgent telegram road, anode end and GND end, the positive pole of the diode are connected with an output end of the transformer secondary output,
One end with first resistor, the emitter stage of triode, the negative pole of voltage-stabiliser tube are connected its negative pole respectively, the first resistor it is another
The base stage with triode, one end of emergency circuit and anode end are connected respectively at end, and the positive pole of the voltage-stabiliser tube is respectively with the
One end of two resistance, the colelctor electrode connection of triode, the other end of the second resistance and one end of the LED connect
Connect, the other end of the LED is connected with described mu balanced circuit one end, the other end of the mu balanced circuit respectively with change
The secondary another output end of depressor, the other end of emergency circuit and GND connection.
The triode is PNP type triode.
The LED emergency power supplies charging sample circuit also includes an electric capacity, described electric capacity one end and the moon of the diode
Pole is connected, and the other end is connected with another output end of the transformer secondary output.
The electric capacity is polar capacitor, and its positive pole is connected with the negative electrode of the diode, negative pole and the transformer secondary output
Another output end connection.
Using such scheme, circuit sample resistance is connected on the positive terminal of battery by the utility model, on mu balanced circuit
One voltage-stabiliser tube of series connection, change the voltage stabilizing value of voltage-stabiliser tube using triode, so as to reach the purpose of charging constant current, can so carry
The degree of accuracy of emergency circuit sampled signal is risen, avoids emergency circuit from working abnormal, the circuit structure is simple, cost is cheap, increases
The reliability of product is added.
Brief description of the drawings
Fig. 1 is the circuit diagram of emergency power supply charging sample circuit in the prior art.
Fig. 2 is the circuit diagram of the utility model LED emergency power supplies charging sample circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Conventional constant-current charge sample circuit is to be located at GND end, behind emergency circuit need to sample transformer and come out
Voltage signal when, may result in sampling it is not accurate enough, emergency circuit work it is abnormal.The utility model is electric by current sampling
Road is connected on the positive terminal of battery, 1 voltage-stabiliser tube of increase series connection on mu balanced circuit, changes the voltage stabilizing value of voltage-stabiliser tube, so as to reach
To the purpose of charging constant current.Referring to Fig. 2, the utility model provides a kind of LED emergency power supplies charging sample circuit, including：Become
It is depressor secondary 20, diode D1, voltage-stabiliser tube ZD, triode Q1, first resistor R1, second resistance R2, LED U1B, steady
Volt circuit 30, emergency circuit 40, anode end EAT+ and GND end EAT-, positive pole and the change of the diode D1
The output end connection of depressor secondary 20, one end with first resistor R1, triode Q1 emitter e, the voltage stabilizing respectively of its negative pole
Pipe ZD negative pole connection, the other end of the first resistor R1 respectively the base stage b with triode Q1, emergency circuit 40 one end and
The EAT+ connections of anode end, the positive pole of the voltage-stabiliser tube ZD one end with second resistance R2, triode Q1 colelctor electrode c respectively
Connection, the other end of the second resistance R2 are connected with one end of the LED U1B, the LED U1B
The other end be connected with described one end of mu balanced circuit 30, the other end of the mu balanced circuit 30 is another with transformer secondary output 20 respectively
One output end, the other end of emergency circuit 40 and GND EAT- connections.The triode Q1 is preferably PNP type triode.
Further, the LED emergency power supplies charging sample circuit also includes one end and the negative electrode of the diode Q1 connects
Connect, the electric capacity C1 that the other end is connected with another output end of the transformer secondary output 20, electric capacity C1 it is defeated to transformer secondary output 20
The voltage gone out carries out voltage regulation filtering.Preferably, the electric capacity C1 is polar capacitor, and the negative electrode of its positive pole and the diode D1 connects
Connect, negative pole is connected with another output end of the transformer secondary output 20.
In the utility model, the voltage-stabiliser tube ZD, triode Q1 and first resistor R1 form charging current limiter circuit 10, to filling
Electric current is adjusted.Circuit sample resistance (first resistor R1) is connected on to the positive terminal EAT+ of battery, in mu balanced circuit 30
Upper series connection one voltage-stabiliser tube ZD, voltage-stabiliser tube ZD value determine the working range of battery charging voltage.When charging current is big, now
Triode Q1 changes voltage-stabiliser tube ZD voltage stabilizing value, and voltage stabilizing value is diminished, and reduces output voltage, reduces charging current.Otherwise work as and fill
The voltage stabilizing value of electric current hour, now triode Q1 change voltage-stabiliser tubes ZD, voltage stabilizing value ZD voltage stabilizing value is become big, it is electric to improve output
Pressure, increase charging current is to rated value, so as to reach the purpose of constant-current charge.
In summary, the utility model provides a kind of LED emergency power supplies charging sample circuit, and circuit sample resistance is connected
In the positive terminal of battery, a voltage-stabiliser tube of being connected on mu balanced circuit, using the voltage stabilizing value of triode change voltage-stabiliser tube, so as to reach
To the purpose of charging constant current, the degree of accuracy of emergency circuit sampled signal can be so lifted, avoids emergency circuit work abnormal,
The circuit structure is simple, cost is cheap, adds the reliability of product.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
- The sample circuit 1. a kind of LED emergency power supplies charge, it is characterised in that including：Transformer secondary output, diode, voltage-stabiliser tube, three Pole pipe, first resistor, second resistance, LED, mu balanced circuit, emergency circuit, anode end and GND end, The positive pole of the diode is connected with an output end of the transformer secondary output, its negative pole one end with first resistor, three respectively The negative pole connection of the emitter stage of pole pipe, voltage-stabiliser tube, the other end of the first resistor base stage with triode, emergency circuit respectively One end and the connection of anode end, one end with second resistance, the colelctor electrode of triode connect respectively for the positive pole of the voltage-stabiliser tube Connect, the other end of the second resistance is connected with one end of the LED, the other end of the LED with The connection of described mu balanced circuit one end, the other end of the mu balanced circuit respectively another output end with transformer secondary output, answer urgent telegram The other end and the GND connection on road.
- The sample circuit 2. LED emergency power supplies according to claim 1 charge, it is characterised in that the triode is positive-negative-positive Triode.
- The sample circuit 3. LED emergency power supplies according to claim 1 charge, it is characterised in that described also including an electric capacity Electric capacity one end is connected with the negative electrode of the diode, and the other end is connected with another output end of the transformer secondary output.
- The sample circuit 4. LED emergency power supplies according to claim 3 charge, it is characterised in that the electric capacity is polarity electricity Hold, its positive pole is connected with the negative electrode of the diode, and negative pole is connected with another output end of the transformer secondary output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466700.9U CN207074865U (en) | 2017-04-28 | 2017-04-28 | A kind of LED emergency power supplies charging sample circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466700.9U CN207074865U (en) | 2017-04-28 | 2017-04-28 | A kind of LED emergency power supplies charging sample circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207074865U true CN207074865U (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720466700.9U Active CN207074865U (en) | 2017-04-28 | 2017-04-28 | A kind of LED emergency power supplies charging sample circuit |
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| Country | Link |
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| CN (1) | CN207074865U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123390A (en) * | 2021-11-11 | 2022-03-01 | 广东力科新能源有限公司 | Detection apparatus for charging circuit |
-
2017
- 2017-04-28 CN CN201720466700.9U patent/CN207074865U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123390A (en) * | 2021-11-11 | 2022-03-01 | 广东力科新能源有限公司 | Detection apparatus for charging circuit |
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