CN204761769U - LED control circuit - Google Patents

LED control circuit Download PDF

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Publication number
CN204761769U
CN204761769U CN201520372226.4U CN201520372226U CN204761769U CN 204761769 U CN204761769 U CN 204761769U CN 201520372226 U CN201520372226 U CN 201520372226U CN 204761769 U CN204761769 U CN 204761769U
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CN
China
Prior art keywords
chip
electric capacity
pin
resistance
rectifier bridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520372226.4U
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Chinese (zh)
Inventor
孙益博
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West Anhui University
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West Anhui University
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Priority to CN201520372226.4U priority Critical patent/CN204761769U/en
Application granted granted Critical
Publication of CN204761769U publication Critical patent/CN204761769U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a LED control circuit, including transformer W, rectifier bridge T, button K1, inductance L1 and chip IC1, the both ends of 220V alternating current are connected respectively at transformer W's primary winding N1's both ends, and rectifier bridge T's port 1 and rectifier bridge T's port 3, rectifier bridge T's the 2 pin VIN that connect electric capacity C3, button K1, inductance L1 and chip IC1 of port are connected respectively at transformer W's secondary N2's both ends. The utility model discloses LED control circuit adopts novel DCDC conversion chip as the voltage control component, has integrated level height, the accurate advantage of control, still set up the open circuit protection unit in the circuit, therefore the circuit has simple structure, stable performance, the manifold advantage of function.

Description

A kind of LED control circuit
Technical field
The utility model relates to a kind of LED circuit, specifically a kind of LED control circuit.
Background technology
Power consumption is low, heat radiation lampet advantage is widely used in lighting apparatus because have for LED, and illumination is most important power mode in daily life, because the driving voltage of LED lamp is different, and it is higher to the requirement of voltage, easily because of overvoltage, the situation such as under-voltage and burning, therefore its Drive and Control Circuit seems particularly important, and current most LED control circuit all exists complex structure, exports unstable defect, and function is comparatively single, therefore need to be improved.
Utility model content
The purpose of this utility model is to provide the LED control circuit that a kind of structure is simple, cost of manufacture is low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of LED control circuit, comprises transformer W, rectifier bridge T, button K1, inductance L 1 and chip IC 1, the two ends of the armature winding N1 of described transformer W connect the two ends of 220V alternating current respectively, and the two ends of the secondary winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, and the port 2 of rectifier bridge T connects electric capacity C3, button K1, the other end contact resistance R1 of the pin VIN of inductance L 1 and chip IC 1, electric capacity C3, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C2, the other end of electric capacity C3, electric capacity C4, the port 4 of rectifier bridge T, the other end of other end contact resistance R1 of the emitter of triode V1 and the pin GND of chip IC 1, button K1 and the pin SHDN of chip IC 1, the pin SW of chip IC 1 connects the other end of inductance L 1 and the other end connection inductance L 2 of electric capacity C1, electric capacity C1, LED group H and electric capacity C4, the other end ground connection of inductance L 2, the pin FB of chip IC 1 connects the other end of electric capacity C2, resistance R2, the pin 4 of chip IC 1, the collector electrode of triode V1, the pin VCC of chip IC 1 and the pin 4 of chip IC 2, the pin 1 of chip IC 1 connects the other end of LED group H and the other end of resistance R6, the other end of base stage contact resistance R3 of triode V1 and the other end of resistance R4.
As preferred version of the present utility model: the model of described chip IC 1 is LT3436.
As preferred version of the present utility model: the model of described chip IC 2 is LM321.
Compared with prior art; the beneficial effects of the utility model are: the utility model LED dimming driving circuit adopts novel DC/DC conversion chip as voltage controlled element; have integrated level high, control advantage accurately; also be provided with open-circuit-protection unit in circuit, therefore circuit have that structure is simple, stable performance, diverse in function advantage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED control circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of LED control circuit, comprise transformer W, rectifier bridge T, button K1, inductance L 1 and chip IC 1, the two ends of the armature winding N1 of described transformer W connect the two ends of 220V alternating current respectively, and the two ends of the secondary winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, and the port 2 of rectifier bridge T connects electric capacity C3, button K1, the other end contact resistance R1 of the pin VIN of inductance L 1 and chip IC 1, electric capacity C3, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C2, the other end of electric capacity C3, electric capacity C4, the port 4 of rectifier bridge T, the other end of other end contact resistance R1 of the emitter of triode V1 and the pin GND of chip IC 1, button K1 and the pin SHDN of chip IC 1, the pin SW of chip IC 1 connects the other end of inductance L 1 and the other end connection inductance L 2 of electric capacity C1, electric capacity C1, LED group H and electric capacity C4, the other end ground connection of inductance L 2, the pin FB of chip IC 1 connects the other end of electric capacity C2, resistance R2, the pin 4 of chip IC 1, the collector electrode of triode V1, the pin VCC of chip IC 1 and the pin 4 of chip IC 2, the pin 1 of chip IC 1 connects the other end of LED group H and the other end of resistance R6, the other end of base stage contact resistance R3 of triode V1 and the other end of resistance R4.
The model of chip IC 1 is LT3436.The model of chip IC 2 is LM321.
Operation principle of the present utility model is: 220V alternating current becomes galvanic current pressure and powers to control circuit after transformer W step-down, rectifier bridge T rectification and electric capacity C3 filtering, the wide input voltage SEPIC drive circuit that control circuit adopts LT3436 to form, can be the drive current that LED group H provides 700mA.The output voltage of converter is 6.8V, i.e. the forward voltage of LED group H.Chip IC 1 is with heat radiation enhancement type control chip that is efficient, 3A electric current plate live source switch, can simplify regulator design and layout.It can also provide enough electric currents to LED driver and not overheated.The voltage switch pressurizer of chip IC 1 from current mode, constant output is changed to detect the minimum current mode constant-current source converter of resistive power loss by chip IC 2.Pinning K switch 1 button can lightening LED lamp group H; trip switch K1 closes IC1; to limit IC1 consume battery power; when there is open circuit in the LED group H in circuit; the voltage of the effective limited chip IC1 output of pressure limiting circuit of resistance R3, resistance R4 and triode V1 composition, thus reach the object of open-circuit-protection.

Claims (3)

1. a LED control circuit, comprises transformer W, rectifier bridge T, button K1, inductance L 1 and chip IC 1, it is characterized in that, the two ends of the armature winding N1 of described transformer W connect the two ends of 220V alternating current respectively, and the two ends of the secondary winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, and the port 2 of rectifier bridge T connects electric capacity C3, button K1, the other end contact resistance R1 of the pin VIN of inductance L 1 and chip IC 1, electric capacity C3, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C2, the other end of electric capacity C3, electric capacity C4, the port 4 of rectifier bridge T, the other end of other end contact resistance R1 of the emitter of triode V1 and the pin GND of chip IC 1, button K1 and the pin SHDN of chip IC 1, the pin SW of chip IC 1 connects the other end of inductance L 1 and the other end connection inductance L 2 of electric capacity C1, electric capacity C1, LED group H and electric capacity C4, the other end ground connection of inductance L 2, the pin FB of chip IC 1 connects the other end of electric capacity C2, resistance R2, the pin 4 of chip IC 1, the collector electrode of triode V1, the pin VCC of chip IC 1 and the pin 4 of chip IC 2, the pin 1 of chip IC 1 connects the other end of LED group H and the other end of resistance R6, the other end of base stage contact resistance R3 of triode V1 and the other end of resistance R4.
2. a kind of LED control circuit according to claim 1, is characterized in that, the model of described chip IC 1 is LT3436.
3. a kind of LED control circuit according to claim 1, is characterized in that, the model of described chip IC 2 is LM321.
CN201520372226.4U 2015-06-02 2015-06-02 LED control circuit Expired - Fee Related CN204761769U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520372226.4U CN204761769U (en) 2015-06-02 2015-06-02 LED control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520372226.4U CN204761769U (en) 2015-06-02 2015-06-02 LED control circuit

Publications (1)

Publication Number Publication Date
CN204761769U true CN204761769U (en) 2015-11-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520372226.4U Expired - Fee Related CN204761769U (en) 2015-06-02 2015-06-02 LED control circuit

Country Status (1)

Country Link
CN (1) CN204761769U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106369492A (en) * 2016-10-20 2017-02-01 桂林大创科技有限公司 Electronic illuminating device under humid environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106369492A (en) * 2016-10-20 2017-02-01 桂林大创科技有限公司 Electronic illuminating device under humid environment

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151111

Termination date: 20160602