CN201114868Y - A driving circuit for LED lighting lamp - Google Patents

A driving circuit for LED lighting lamp Download PDF

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Publication number
CN201114868Y
CN201114868Y CNU2007200074848U CN200720007484U CN201114868Y CN 201114868 Y CN201114868 Y CN 201114868Y CN U2007200074848 U CNU2007200074848 U CN U2007200074848U CN 200720007484 U CN200720007484 U CN 200720007484U CN 201114868 Y CN201114868 Y CN 201114868Y
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CN
China
Prior art keywords
circuit
constant
current control
current
load
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
CNU2007200074848U
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Chinese (zh)
Inventor
张志和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Guangyou Electric Equipment Co Ltd
Original Assignee
Xiamen Guangyou Electric Equipment Co Ltd
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Publication date
Application filed by Xiamen Guangyou Electric Equipment Co Ltd filed Critical Xiamen Guangyou Electric Equipment Co Ltd
Priority to CNU2007200074848U priority Critical patent/CN201114868Y/en
Application granted granted Critical
Publication of CN201114868Y publication Critical patent/CN201114868Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a drive circuit of an LED lamp, which at least comprises a rectifying and filtering circuit, a constant current control circuit and a load circuit. The rectifying and filtering circuit can be electrically connected with an external power source and the constant current control circuit is electrically connected with the rectifying and filtering circuit which is also electrically connected with the load circuit. The technical proposal of the utility model creatively puts forward the drive circuit of the LED lamp, the drive circuit of an LED lamp is internally provided with a constant current control circuit used for leading the current of the output end of the load circuit to be a constant value, thus ensuring the load circuit (a semiconductor luminescence diode) to work in the state of constant current.

Description

A kind of LED illuminating lamp drive circuit
Technical field
The utility model relates to a kind of LED illuminating lamp drive circuit.
Background technology
The 1-40W LED lighting that sell in present market, its drive circuit includes only current rectifying and wave filtering circuit and load circuit, and this current rectifying and wave filtering circuit can connect external power source by electricity, and this load circuit electricity connects current rectifying and wave filtering circuit.In actual the use, civil power alternating current 220V (external power source) is directly supplied with back level led (load circuit) and is used as power supply after the simple rectification of current rectifying and wave filtering circuit and filtering, when civil power 220V change in voltage, the operating voltage of semiconductor supply light-emitting diode also and then changes, big electric current can appear, and big electric current can be accelerated the light decay of semiconductor light-emitting-diode, shortens the life-span of semiconductor light-emitting-diode.Because the rectifier diode of current rectifying and wave filtering circuit is a nonlinear device, voltage and current on the filter capacitor of current rectifying and wave filtering circuit is also asynchronous, therefore there is a phase difference, has utilance to power supply deficiency low, that can impact electrical network and other power consumption equipment.
The utility model content
The utility model provides a kind of LED illuminating lamp drive circuit, and it has overcome, and the LED illuminating lamp drive circuit of background technology is existing accelerates the light decay of semiconductor light-emitting-diode because of big electric current occurring, shortens the deficiency in the life-span of semiconductor light-emitting-diode.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of LED illuminating lamp drive circuit, which comprises at least a current rectifying and wave filtering circuit, a constant-current control circuit and a load circuit, this current rectifying and wave filtering circuit can connect external power source by electricity, this constant-current control circuit electricity connects current rectifying and wave filtering circuit, and this load circuit electricity connects constant-current control circuit.
According to the utility model one preferred embodiment, also comprise a phase difference correction circuit at least, this phase difference correction circuit electricity connects between current rectifying and wave filtering circuit and the constant-current control circuit.
According to the utility model one preferred embodiment, also comprise a voltage stabilizing circuit at least, this voltage stabilizing circuit electricity connects between constant-current control circuit and the load circuit.
Technical solutions of the utility model have creatively proposed a kind of LED illuminating lamp drive circuit, in establish constant-current control circuit, being used to make the electric current of load circuit input is constant, load circuit (semiconductor light-emitting-diode) can stably be worked under constant current state, because the LED illuminating lamp has the advantages that when the electric current of load circuit input the is constant employed semiconductor light-emitting-diode of LED lighting is in best operating condition, therefore LED illuminating lamp drive circuit of the present utility model can overcome the existing shortcoming of background technology, and have a following advantage: one can greatly prolong useful life of semiconductor light-emitting-diode; Its two, protection semiconductor light-emitting-diode function; Its three, reduce user's use cost.It is poor that the phase difference correction circuit is used for phase calibration, can improve the power factor of light fixture, can improve and use electricity quality, and this is in epoch of energy scarcity now, can play the effect of energy savings.Voltage stabilizing circuit is used for the voltage between the control load circuit two ends, to reduce load circuit heating, energy savings.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 illustrates the circuit theory diagrams of the utility model one preferred embodiment.
Fig. 2 illustrates the physical circuit figure of the utility model one preferred embodiment.
Label declaration: current rectifying and wave filtering circuit 10, phase difference correction circuit 20, constant-current control circuit 30, voltage stabilizing circuit 40, load circuit 50.
Embodiment
See also Fig. 1 and Fig. 2, its respectively illustrate the circuit theory diagrams and the physical circuit figure of the utility model one preferred embodiment.A kind of LED illuminating lamp drive circuit which comprises at least a current rectifying and wave filtering circuit 10, a phase difference correction circuit 20, a constant-current control circuit 30, a voltage stabilizing circuit 40 and a load circuit 50.
The input of current rectifying and wave filtering circuit 10 can connect external power source (alternating current 220V) by electricity.These current rectifying and wave filtering circuit 10 physical circuits are bridge rectifier filter circuit.Because this current rectifying and wave filtering circuit is a prior art, is not further described at this in order to save space.
The input of phase difference correction circuit 20 is connected to the output of current rectifying and wave filtering circuit 10.This phase difference correction circuit 20 comprises diode D1, D2, D3, capacitor C 2, C3.Through the Rectified alternating current behind the bridge rectifier by D2 to C2, C3 serial connection charge, voltage on C2, the C3 can only be charged to half of AC-input voltage Vm peak value at most, they charge when the sinusoidal instantaneous value of input AC is higher than 1/2Vm always, and its charging interval is longer.Simultaneously to load discharge, their voltage fall off rate is faster than the fall off rate of AC supply voltage by D3 because capacitor C 2 is by D1, capacitor C 3 again, and only when AC supply voltage was lower than voltage on capacitor C 2, the C3, electric capacity just stopped charging.So the time of electric capacity charging is to be elongated the time of input current, time of zero has shortened and to be input current be the time of capacitor discharge, and the utilance of power supply has been enhanced.
The input of constant-current control circuit 30 is connected to the output of phase difference correction circuit 20, and these constant-current control circuit 30 physical circuits are the common galvanostat in a market, and the model of being produced as U.S. SUPERTEX company is the galvanostat of CL2.
The input of voltage stabilizing circuit 40 is connected to the output of constant-current control circuit 30, and these voltage stabilizing circuit 40 physical circuits are voltage stabilizing didoe.
The input of load circuit 50 is connected to the output of voltage stabilizing circuit 40.This load circuit 50 is a prior art, is not further described at this in order to save space.
Constant-current control circuit 30 makes load circuit 50 two ends load the electric current of constant 20mA.
The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims (3)

1. LED illuminating lamp drive circuit, it is characterized in that: which comprises at least a current rectifying and wave filtering circuit, a constant-current control circuit and a load circuit, this current rectifying and wave filtering circuit can connect external power source by electricity, and this constant-current control circuit electricity connects current rectifying and wave filtering circuit, and this load circuit electricity connects constant-current control circuit.
2. a kind of LED illuminating lamp drive circuit according to claim 1 is characterized in that: also comprise a phase difference correction circuit at least, this phase difference correction circuit electricity connects between current rectifying and wave filtering circuit and the constant-current control circuit.
3. a kind of LED illuminating lamp drive circuit according to claim 1 and 2 is characterized in that: also comprise a voltage stabilizing circuit at least, this voltage stabilizing circuit electricity connects between constant-current control circuit and the load circuit.
CNU2007200074848U 2007-06-28 2007-06-28 A driving circuit for LED lighting lamp Expired - Fee Related CN201114868Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200074848U CN201114868Y (en) 2007-06-28 2007-06-28 A driving circuit for LED lighting lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200074848U CN201114868Y (en) 2007-06-28 2007-06-28 A driving circuit for LED lighting lamp

Publications (1)

Publication Number Publication Date
CN201114868Y true CN201114868Y (en) 2008-09-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200074848U Expired - Fee Related CN201114868Y (en) 2007-06-28 2007-06-28 A driving circuit for LED lighting lamp

Country Status (1)

Country Link
CN (1) CN201114868Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101925232A (en) * 2010-08-12 2010-12-22 无锡科尔华电子有限公司 LED street lamp constant current control power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101925232A (en) * 2010-08-12 2010-12-22 无锡科尔华电子有限公司 LED street lamp constant current control power supply
CN101925232B (en) * 2010-08-12 2013-04-03 无锡科尔华电子有限公司 LED street lamp constant current control power supply

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080910