CN218603692U - LED drive circuit with protection circuit - Google Patents
LED drive circuit with protection circuit Download PDFInfo
- Publication number
- CN218603692U CN218603692U CN202222683162.2U CN202222683162U CN218603692U CN 218603692 U CN218603692 U CN 218603692U CN 202222683162 U CN202222683162 U CN 202222683162U CN 218603692 U CN218603692 U CN 218603692U
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- triode
- resistance
- circuit
- led drive
- drive circuit
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Abstract
The utility model belongs to the technical field of the LED circuit technique and specifically relates to a take protection circuit's LED drive circuit, including LED drive circuit and the protection circuit of setting on LED drive circuit, protection circuit includes resistance one, resistance two, resistance three, resistance four, triode, electric capacity one and relay, LED drive circuit's output power negative pole end is connected after LED drive circuit's output power positive pole end series resistance one, resistance two, tie point between triode's base connecting resistance one and resistance two, LED drive circuit's output power negative pole end is connected to the projecting pole of triode, and ground connection behind the coil of relay is connected to the collecting electrode of triode, and the normally closed switch of relay establishes ties on the output power circuit that LED drive circuit and LED lamp are connected, resistance four establishes ties between the collecting electrode and the projecting pole of triode, electric capacity one establishes ties between the collecting electrode and the projecting pole of triode, the utility model discloses can open circuit the protection to the LED lamp.
Description
Technical Field
The utility model relates to a LED circuit technical field, concrete field is a take protection circuit's LED drive circuit.
Background
When the LED lamp driving circuit is in operation, if water leaks to the driving circuit, the value of the current flowing through the circuit when abnormal connection (namely short circuit) occurs between phases or between phases and the ground (or neutral wire) can be far greater than the rated current, and the short circuit instantaneous current flowing through the LED lamp is too large, so that the normal operation of the circuit is easily seriously affected, and the LED lamp is burnt out due to the too large current.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a take protection circuit's LED drive circuit.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take protection circuit's LED drive circuit, includes LED drive circuit and the protection circuit of setting on LED drive circuit, protection circuit includes resistance one, resistance two, resistance three, resistance four, triode, electric capacity one and relay, LED drive circuit's output power positive terminal is once connected LED drive circuit's output power negative terminal behind series resistance one, resistance two, the tie point between the base connecting resistance one of triode and resistance two, LED drive circuit's output power positive terminal is connected to resistance three one end, and the collecting electrode of triode is connected to the other end, and LED drive circuit's output power negative terminal is connected to the projecting pole of triode, and ground connection behind the coil of relay is connected to the collecting electrode of triode, and the normally closed switch of relay establishes ties on the output power circuit that LED drive circuit and LED lamp are connected, resistance four establishes ties between the collecting electrode and the projecting pole of triode, electric capacity one establishes ties between the collecting electrode and the projecting pole of triode.
Preferably, the first resistor is connected with a second capacitor in parallel.
Preferably, the first capacitor is an electrolytic capacitor, the positive end of the first capacitor is connected with the collector of the triode, and the negative end of the first capacitor is connected with the emitter of the triode.
Preferably, an LED indicator light is connected in series with the fourth resistor.
Preferably, a resistor five is arranged on the base electrode of the triode, one end of the resistor five is connected to a connection point of the resistor one and the resistor two, and the other end of the resistor five is connected with the base electrode of the triode.
Compared with the prior art, the beneficial effects of the utility model are that: through the cooperation setting of triode, electric capacity and relay, can realize that the short circuit takes place the back and open circuit the protection to the LED lamp, avoid the LED lamp to damage, after eliminating the short circuit, the restart power, the circuit can resume normal work.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure: 1. an LED drive circuit; 2. a first resistor; 3. a second resistor; 4. a third resistor; 5. a fourth resistor; 6. a triode; 7. a first capacitor; 8. a relay; 9. an LED lamp; 10. a second capacitor; 11. an LED indicator light; 12. and a resistance of five.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a take protection circuit's LED drive circuit, includes LED drive circuit 1 and the protection circuit of setting on LED drive circuit 1, protection circuit includes resistance 2, resistance two 3, resistance three 4, resistance four 5, triode 6, electric capacity 7 and relay 8, LED drive circuit 1's output power positive terminal is once connected LED drive circuit 1's output power negative terminal after series resistance 2, resistance two 3, the tie point between base connecting resistance 2 and resistance two 3 of triode 6, LED drive circuit 1's output power positive terminal is connected to resistance three 4 one end, and triode 6's collecting electrode is connected to the other end, and LED drive circuit 1's output power negative terminal is connected to triode 6's projecting pole, and relay 8's coil back ground connection is connected to triode 6's collecting electrode, and relay 8's normally closed switch establishes ties on the output power circuit that LED drive circuit 1 and LED lamp 9 are connected, electric capacity four 5 establishes ties between triode 6's collecting electrode and projecting pole, electric capacity one 7 establishes ties between triode 6's collecting electrode and projecting pole.
The resistor I2 is provided with a capacitor II 10 in parallel, and through the arrangement of the capacitor II 10, the power supply between the resistor I2 and the resistor II 3 can be filtered and stabilized, so that the influence of instantaneous voltage on the triode 6 is avoided, and the circuit can not work normally.
The capacitor I7 is an electrolytic capacitor, the positive end of the capacitor I7 is connected with the collector of the triode 6, and the negative end of the capacitor I7 is connected with the emitter of the triode 6.
An LED indicating lamp 11 is connected in series on the fourth resistor 5, and whether the circuit is short-circuited or not can be conveniently indicated through the arrangement of the LED indicating lamp 11.
The base electrode of the triode 6 is provided with a resistor five 12, one end of the resistor five 12 is connected to a connection point of the resistor one 2 and the resistor two 3, the other end of the resistor five 12 is connected with the base electrode of the triode 6, and the resistor five 12 is used for protecting a protection resistor and is used for carrying out voltage protection on a trigger power supply input into the triode 6, so that the triode 6 is prevented from being damaged.
Through this technical scheme, normal work is LED drive circuit 1 output power to LED lamp 9, make LED lamp 9 normally light the operation, after the short circuit takes place, output voltage obtains the magnitude of voltage through resistance 2 and the sampling of resistance two 3 and can't maintain triode 6 and switch on, then triode 6 turn-offs, electric capacity one 7 is charged, the power of connecting triode 6 collecting electrode constantly risees along with the lapse voltage of time, make relay 8's coil electrified, open contact disconnection with the matching of relay 8 coil, make LED lamp 9 department circuit break, simultaneously because of electric capacity one 7 charges and discharges, LED pilot lamp 11 lights, the short circuit condition appears in the suggestion circuit.
When the short circuit is eliminated by the checking circuit, the power supply is restarted, and the circuit can recover to work normally.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a take protection circuit's LED drive circuit which characterized in that: including LED drive circuit and the protection circuit of setting on LED drive circuit, protection circuit includes resistance one, resistance two, resistance three, resistance four, triode, electric capacity one and relay, LED drive circuit's output power negative pole end is connected behind the primary series resistance one of output power positive terminal, resistance two to the output power negative pole end, the tie point between the base connecting resistance one of triode and the resistance two, LED drive circuit's output power positive terminal is connected to three one end of resistance, and the collecting electrode of triode is connected to the other end, and LED drive circuit's output power negative pole end is connected to the projecting pole of triode, and ground connection behind the coil of relay is connected to the collecting electrode of triode, and the normally closed switch of relay establishes ties on the output power circuit that LED drive circuit and LED lamp are connected, resistance four establishes ties between the collecting electrode and the projecting pole of triode, electric capacity one establishes ties between the collecting electrode and the projecting pole of triode.
2. The LED driving circuit with the protection circuit as claimed in claim 1, wherein: and the first resistor is connected with a second capacitor in parallel.
3. The LED driving circuit with the protection circuit as claimed in claim 1, wherein: the capacitor I is an electrolytic capacitor, the positive end of the capacitor I is connected with the collector of the triode, and the negative end of the capacitor I is connected with the emitter of the triode.
4. The LED driving circuit with the protection circuit as claimed in claim 1, wherein: and an LED indicating lamp is connected in series with the fourth resistor.
5. The LED driving circuit with the protection circuit as claimed in claim 1, wherein: and a resistor five is arranged on the base electrode of the triode, one end of the resistor five is connected to a connection point of the resistor one and the resistor two, and the other end of the resistor five is connected with the base electrode of the triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222683162.2U CN218603692U (en) | 2022-10-09 | 2022-10-09 | LED drive circuit with protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222683162.2U CN218603692U (en) | 2022-10-09 | 2022-10-09 | LED drive circuit with protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218603692U true CN218603692U (en) | 2023-03-10 |
Family
ID=85402075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222683162.2U Active CN218603692U (en) | 2022-10-09 | 2022-10-09 | LED drive circuit with protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218603692U (en) |
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2022
- 2022-10-09 CN CN202222683162.2U patent/CN218603692U/en active Active
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