CN203181299U - Constant-current driving circuit structure for small-power lamps - Google Patents

Constant-current driving circuit structure for small-power lamps Download PDF

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Publication number
CN203181299U
CN203181299U CN 201320118224 CN201320118224U CN203181299U CN 203181299 U CN203181299 U CN 203181299U CN 201320118224 CN201320118224 CN 201320118224 CN 201320118224 U CN201320118224 U CN 201320118224U CN 203181299 U CN203181299 U CN 203181299U
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pin
resistance
circuit module
constant
capacitor
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CN 201320118224
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陈晶
华娟
陆冬磊
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Wuxi Professional College of Science and Technology
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Wuxi Professional College of Science and Technology
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Abstract

The utility model provides a constant-current driving circuit structure for small-power lamps, wherein the circuit structure is simple and low in cost. The constant-current driving circuit structure can be effectively used for driving small-power lamps within a universal AC input voltage range. The constant-current driving circuit structure comprises an anti-surge protection circuit module, a bridge rectifier circuit module, a power factor correction circuit module, a constant-current control circuit module and a constant-current output circuit module. The output end of the anti-surge protection circuit module is connected with the input end of the bridge rectifier circuit module. The output end of the bridge rectifier circuit module is connected with the input end of the power factor correction circuit module. The output end of the power factor correction circuit module is connected with the input end of the constant-current control circuit module. The output end of the constant-current control circuit module is connected with the input end of the constant-current output circuit module.

Description

A kind of constant-current drive circuit structure for the small-power light fixture
Technical field
The utility model relates to electronic technology field, is specially a kind of constant-current drive circuit structure for the small-power light fixture.
Background technology
In the global energy shortage; under the background that environmental requirement improves constantly; the green energy conservation illumination is greatly developed in countries in the world; the LED illumination is as a kind of revolutionary energy-saving illumination technology; just in develop rapidly; yet; the requirement of LED driving power is also improving constantly; high efficiency; High Power Factor; safety is isolated; meet the EMI standard; high Current Control precision; high reliability; volume is little; the low crucial evaluation index that becomes the LED driving power that waits of cost; at present; known LED constant-current driving power supply circuit comprises protective circuit module 6; current rectifying and wave filtering circuit module 7; pfc circuit module 8; pwm control circuit module 9; decompression voltage regulator module 10 and expansion stream constant-current circuit module 11; the output of described protective circuit module 6 connects the input of described current rectifying and wave filtering circuit module 7; the output of described current rectifying and wave filtering circuit module 7 connects the input of described pfc circuit module 8; the output of described pfc circuit module 8 connects the input of described pwm control circuit module 9; the output of described pwm control circuit module 9 connects the input of described decompression voltage regulator module 10; the output of described decompression voltage regulator module 10 connects the input of described expansion stream constant-current circuit module 11; and this circuit structure is comparatively complicated; and components and parts are used more, are not suitable for being used on the less small-power shot-light of some volumes.
Summary of the invention
At the problems referred to above, the utility model provides a kind of constant-current drive circuit structure for the small-power light fixture, and its circuit structure is simple, with low cost, can effectively be used in the general ac input voltage scope to drive on the small-power light fixture.
Its technical scheme is such: it is characterized in that: it comprises antisurge protective circuit module; bridge heap rectification circuit module; the circuit of power factor correction module; the constant-current control circuit module; the constant current output circuit module; the output of described antisurge protective circuit module connects the input of described bridge heap rectification circuit module; the output of described bridge heap rectification circuit module connects the input of described circuit of power factor correction module; the output of described circuit of power factor correction module connects the input of described constant-current control circuit module, and the output of described constant-current control circuit module connects the input of described constant current output circuit module.
It is further characterized in that: described antisurge protective circuit module comprises piezo-resistance VR1, described bridge heap rectification circuit module comprises full-bridge rectification bridge heap DB1,1 pin of described full-bridge rectification bridge heap DB1 connects the end of described piezo-resistance VR1, the other end of described piezo-resistance VR1 is connected to 2 pin of described full-bridge rectification bridge heap DB1, the 4 pin ground connection of described full-bridge rectification bridge heap DB1;
Described circuit of power factor correction module comprises inductance L 1, resistance R 1, metal-oxide-semiconductor Q1, electrochemical capacitor C1, C2, capacitor C 4, one end of the positive pole of described electrochemical capacitor C1, inductance L 1 all is connected to 3 pin of described full-bridge rectification bridge heap DB1, one end of the positive pole of described electrochemical capacitor C2, resistance R 1 all is connected with the other end of described inductance L 1, one end of described capacitor C 4 is connected with the other end of described resistance R 1, the equal ground connection of the other end of the negative pole of described electrochemical capacitor C1, C2, capacitor C 4,1 pin of described metal-oxide-semiconductor Q1 are connected between described resistance R 1, the capacitor C 4;
Described constant-current control circuit module comprises constant current control chip IC1, transformer T1, diode D1, mica capacitor CY1, capacitor C 3, C5, resistance R 2, R3, R4, described constant current control chip IC1 adopts chip PT4203,6 pin of described constant current control chip IC1 are connected to an end of described capacitor C 4,4 pin of described constant current control chip IC1 are connected to an end of described capacitor C 5, the other end of described capacitor C 5, the equal ground connection of 2 pin of described constant current control chip IC1,1 pin of described constant current control chip IC1 is connected with 3 pin of described metal-oxide-semiconductor Q1, described capacitor C 3, one end of resistance R 2 and 1 pin of described transformer T1 all are connected with an end of described resistance R 1, described capacitor C 3, the other end of resistance R 2 is connected with the negative electrode of described diode D1,3 pin of described transformer T1,2 pin of described metal-oxide-semiconductor Q1 are connected with the anode of described diode D1,5 pin of described transformer T1 are connected with an end of described resistance R 3, the other end of described resistance R 3 is connected with an end of described resistance R 4, the other end ground connection of described resistance R 4,6 pin of described transformer T1 are connected back ground connection with the end of described mica capacitor CY1, the other end of described mica capacitor CY1 is connected with 7 pin of described transformer T1;
Described constant current output circuit module comprises diode D2, electrochemical capacitor C6, resistance R 5, the anode of described diode D2 connects 8 pin of described transformer T1, one end of the positive pole of described electrochemical capacitor C6, resistance R 5 connects the negative electrode of described diode D2, and the other end of the negative pole of described electrochemical capacitor C6, resistance R 5 is connected with 7 pin of described transformer T1.
The beneficial effects of the utility model are; it is simple in structure; parts number is few; adopt PT4203 as the constant current control chip in the constant-current control circuit module, it is cheap, and PT4203 adopts transformer primary induction constant current control technology; can guarantee to keep constant at 85VAC ~ 265VAC input voltage range load current; have defencive functions such as excess temperature, overvoltage, load open circuit, the efficient height can effectively be applied on the less small-power light fixture of volume.
Description of drawings
Fig. 1 is the composition frame chart of existing LED constant-current driving power supply circuit;
Fig. 2 is composition frame chart of the present utility model;
Fig. 3 is circuit theory diagrams of the present utility model.
Embodiment
As Fig. 2; shown in Figure 3; the utility model comprises antisurge protective circuit module 1; bridge heap rectification circuit module 2; circuit of power factor correction module 3; constant-current control circuit module 4; constant current output circuit module 5; the output of antisurge protective circuit module 1 connects the input of bridge heap rectification circuit module 2; the output of bridge heap rectification circuit module 2 connects the input of circuit of power factor correction module 3; the output of circuit of power factor correction module 3 connects the input of constant-current control circuit module 4, and the output of constant-current control circuit module 4 connects the input of constant current output circuit module 5.
Antisurge protective circuit module 1 comprises piezo-resistance VR1, bridge heap rectification circuit module 2 comprises full-bridge rectification bridge heap DB1,1 pin of full-bridge rectification bridge heap DB1 connects the end of piezo-resistance VR1, the other end of piezo-resistance VR1 is connected to 2 pin of full-bridge rectification bridge heap DB1, the 4 pin ground connection of full-bridge rectification bridge heap DB1; Input P1 imports 85VAC ~ 265VAC input voltage, and 1 pin of input P1 is connected with an end of fuse resistance R 0, and the other end of fuse resistance R 0 is connected with the end of piezo-resistance VR1, and 2 pin of input P1 connect the other end of piezo-resistance VR1; Circuit of power factor correction module 3 comprises inductance L 1, resistance R 1, metal-oxide-semiconductor Q1, electrochemical capacitor C1, C2, capacitor C 4, one end of the positive pole of electrochemical capacitor C1, inductance L 1 all is connected to 3 pin of full-bridge rectification bridge heap DB1, one end of the positive pole of electrochemical capacitor C2, resistance R 1 all is connected with the other end of inductance L 1, one end of capacitor C 4 is connected with the other end of resistance R 1, the equal ground connection of the other end of the negative pole of electrochemical capacitor C1, C2, capacitor C 4,1 pin of metal-oxide-semiconductor Q1 are connected between resistance R 1, the capacitor C 4; Constant-current control circuit module 4 comprises constant current control chip IC1, transformer T1, diode D1, mica capacitor CY1, capacitor C 3, C5, resistance R 2, R3, R4, constant current control chip IC1 adopts chip PT4203,6 pin of constant current control chip IC1 are connected to an end of capacitor C 4,4 pin of constant current control chip IC1 are connected to an end of capacitor C 5, the other end of capacitor C 5, the equal ground connection of 2 pin of constant current control chip IC1,1 pin of constant current control chip IC1 is connected with 3 pin of metal-oxide-semiconductor Q1, capacitor C 3, one end of resistance R 2 and 1 pin of transformer T1 all are connected with an end of resistance R 1, capacitor C 3, the other end of resistance R 2 is connected with the negative electrode of diode D1,3 pin of transformer T1,2 pin of metal-oxide-semiconductor Q1 are connected with the anode of diode D1,5 pin of transformer T1 are connected with an end of resistance R 3, the other end of resistance R 3 is connected with an end of resistance R 4, the other end ground connection of resistance R 4,6 pin of transformer T1 are connected back ground connection with the end of mica capacitor CY1, the other end of mica capacitor CY1 is connected with 7 pin of transformer T1; Constant current output circuit module 5 comprises diode D2, electrochemical capacitor C6, resistance R 5, the anode of diode D2 connects 8 pin of transformer T1, one end of the positive pole of electrochemical capacitor C6, resistance R 5 connects the negative electrode of diode D2, the other end of the negative pole of electrochemical capacitor C6, resistance R 5 is connected with 7 pin of transformer T1, and the two ends of resistance R 5 are connected to 1,2 pin of output P2 respectively.
Operation principle of the present utility model is: electric main is by input P1 input; through fuse resistance R 0; piezo-resistance VR1 plays the input protection effect of circuit; AC signal is converted into dc signal through heap rectification circuit module 2 rectifications of passing a bridge again; circuit of power factor correction module 3 can effectively reduce low frequency to the interference of AC signal simultaneously; dc signal after the rectification is through capacitor C 3; resistance R 2; can be controlled in behind the diode D1 relatively stably on the dc level signal; constant current control chip IC1 adopts transformer primary induction constant current control technology in the constant-current control circuit module 4; guarantee to keep constant at mains input voltage scope load current; constant current signal is by the 1 pin output of constant current control chip IC1; the unilateal conduction of diode D2 control current signal; electrochemical capacitor C6 prevents that effectively the constant current signal of exporting from producing ripple, and final constant current signal is by output P2 output.

Claims (5)

1. constant-current drive circuit structure that is used for the small-power light fixture; it is characterized in that: it comprises antisurge protective circuit module; bridge heap rectification circuit module; the circuit of power factor correction module; the constant-current control circuit module; the constant current output circuit module; the output of described antisurge protective circuit module connects the input of described bridge heap rectification circuit module; the output of described bridge heap rectification circuit module connects the input of described circuit of power factor correction module; the output of described circuit of power factor correction module connects the input of described constant-current control circuit module, and the output of described constant-current control circuit module connects the input of described constant current output circuit module.
2. a kind of constant-current drive circuit structure for the small-power light fixture according to claim 1; it is characterized in that: described antisurge protective circuit module comprises piezo-resistance VR1; described bridge heap rectification circuit module comprises full-bridge rectification bridge heap DB1; 1 pin of described full-bridge rectification bridge heap DB1 connects the end of described piezo-resistance VR1; the other end of described piezo-resistance VR1 is connected to 2 pin of described full-bridge rectification bridge heap DB1, the 4 pin ground connection of described full-bridge rectification bridge heap DB1.
3. a kind of constant-current drive circuit structure for the small-power light fixture according to claim 2, it is characterized in that: the circuit of power factor correction module comprises inductance L 1, resistance R 1, metal-oxide-semiconductor Q1, electrochemical capacitor C1, C2, capacitor C 4, the positive pole of described electrochemical capacitor C1, one end of inductance L 1 all is connected to 3 pin of described full-bridge rectification bridge heap DB1, the positive pole of described electrochemical capacitor C2, one end of resistance R 1 all is connected with the other end of described inductance L 1, one end of described capacitor C 4 is connected with the other end of described resistance R 1, described electrochemical capacitor C1, the negative pole of C2, the equal ground connection of the other end of capacitor C 4,1 pin of described metal-oxide-semiconductor Q1 is connected to described resistance R 1, between the capacitor C 4.
4. a kind of constant-current drive circuit structure for the small-power light fixture according to claim 3, it is characterized in that: the constant-current control circuit module comprises constant current control chip IC1, transformer T1, diode D1, mica capacitor CY1, capacitor C 3, C5, resistance R 2, R3, R4, described constant current control chip IC1 adopts chip PT4203,6 pin of described constant current control chip IC1 are connected to an end of described capacitor C 4,4 pin of described constant current control chip IC1 are connected to an end of described capacitor C 5, the other end of described capacitor C 5, the equal ground connection of 2 pin of described constant current control chip IC1,1 pin of described constant current control chip IC1 is connected with 3 pin of described metal-oxide-semiconductor Q1, described capacitor C 3, one end of resistance R 2 and 1 pin of described transformer T1 all are connected with an end of described resistance R 1, described capacitor C 3, the other end of resistance R 2 is connected with the negative electrode of described diode D1,3 pin of described transformer T1,2 pin of described metal-oxide-semiconductor Q1 are connected with the anode of described diode D1,5 pin of described transformer T1 are connected with an end of described resistance R 3, the other end of described resistance R 3 is connected with an end of described resistance R 4, the other end ground connection of described resistance R 4,6 pin of described transformer T1 are connected back ground connection with the end of described mica capacitor CY1, the other end of described mica capacitor CY1 is connected with 7 pin of described transformer T1.
5. a kind of constant-current drive circuit structure for the small-power light fixture according to claim 4, it is characterized in that: the constant current output circuit module comprises diode D2, electrochemical capacitor C6, resistance R 5, the anode of described diode D2 connects 8 pin of described transformer T1, one end of the positive pole of described electrochemical capacitor C6, resistance R 5 connects the negative electrode of described diode D2, and the other end of the negative pole of described electrochemical capacitor C6, resistance R 5 is connected with 7 pin of described transformer T1.
CN 201320118224 2013-03-15 2013-03-15 Constant-current driving circuit structure for small-power lamps Expired - Fee Related CN203181299U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103442504A (en) * 2013-09-18 2013-12-11 湘潭大学 LED (Light Emitting Diode) constant current driving circuit based on PWM (Pulse-Width Modulation) light-adjusting mode
CN106507546A (en) * 2016-12-26 2017-03-15 吉安伊戈尔电气有限公司 A kind of high reliability surge protection circuit
CN111385942A (en) * 2019-11-12 2020-07-07 浙江凯耀照明有限责任公司 LED lamp driving circuit capable of improving PF value
CN108040400B (en) * 2018-01-12 2023-07-18 美智光电科技股份有限公司 LED driving circuit and LED lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103442504A (en) * 2013-09-18 2013-12-11 湘潭大学 LED (Light Emitting Diode) constant current driving circuit based on PWM (Pulse-Width Modulation) light-adjusting mode
CN106507546A (en) * 2016-12-26 2017-03-15 吉安伊戈尔电气有限公司 A kind of high reliability surge protection circuit
CN108040400B (en) * 2018-01-12 2023-07-18 美智光电科技股份有限公司 LED driving circuit and LED lamp
CN111385942A (en) * 2019-11-12 2020-07-07 浙江凯耀照明有限责任公司 LED lamp driving circuit capable of improving PF value

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C14 Grant of patent or utility model
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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130904

Termination date: 20160315

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