CN202551455U - LED (Light-Emitting Diode) constant-current driving power supply - Google Patents
LED (Light-Emitting Diode) constant-current driving power supply Download PDFInfo
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- CN202551455U CN202551455U CN2012201768363U CN201220176836U CN202551455U CN 202551455 U CN202551455 U CN 202551455U CN 2012201768363 U CN2012201768363 U CN 2012201768363U CN 201220176836 U CN201220176836 U CN 201220176836U CN 202551455 U CN202551455 U CN 202551455U
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Abstract
The utility model discloses an LED (Light-Emitting Diode) constant-current driving power supply, which comprises a plurality of constant-current modules, wherein each constant-current module comprises a respective direct-current output end; and the plurality of constant-current modules share a direct-current input end. Due to the adoption of the LED constant-current driving power supply, the output current of each path of constant-current module can be regulated to a fixed current value and output to each light bar respectively. Under the condition of sufficient power of a direct-current power supply source, current output by each path of constant-current module is not influenced by the voltages of the light bars and is not influenced mutually, the problem of non-uniform shunting caused by different pressure drops of the light bars does not exist, and the service life of LED light bars can be effectively ensured.
Description
[technical field]
The utility model relates to the LED driving power, relates in particular to a kind of LED constant-current driving power supply.
[background technology]
The driving power that present LED light fixture is adopted is a constant-current supply, and constant-current supply can be exported the electric current of steady state value, and its output current receives load effect less, is fit to be applied to single-string LED lamp bar.But when constant-current supply drives multi-string LED lamp bar; Constant-current supply need be distributed to each street lamp bar with its total current; Voltage drop has than large deviation like different lamp bar, and constant-current supply can only keep the constant of total output current and can not make total output current mean allocation to each street lamp bar.Because it is that brightness is inconsistent between the lamp bar that electric current does not have mean allocation, caloric value is inconsistent.The electric current that the lamp bar branch that lamp bar voltage reduces obtains is bigger than normal, makes it brighter and heating is more.The tube voltage drop Yin Wendu of LED lamp pearl itself raises and reduces, and it is big more that the high more tube voltage drop of temperature descends, and then the electric current of getting is bigger; It is more to generate heat; So vicious circle possibly make electric current exceed the tolerance range of lamp pearl, and the LED light decay is serious, greatly reduces the life-span of lamp bar.At present, the pressure drop deviation between each lamp bar is dwindled as far as possible, thereby reduce the current deviation between the lamp bar through the mode of screening the lamp pearl.But screening lamp pearl exists uncertainty, the complexity of human factor, has increased human cost, and this mode can not fundamentally solve the uneven problem of lamp bar shunting.
[summary of the invention]
The technical problem that the utility model will solve provides and a kind ofly can drive LED multi-path lamp bar, each street lamp bar shunting evenly, and the LED constant-current driving power supply that is independent of each other of each road electric current.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is, a kind of LED constant-current driving power supply comprises a plurality of constant flow modules, and described constant flow module comprises dc output end separately, a plurality of constant flow module common dc inputs.
Above-described LED constant-current driving power supply; Described constant flow module comprises the LED constant-current driven chip; Output filter capacitor, choke induction and input filter capacitor; The positive pole of direct-flow input end connects the power voltage terminal of LED constant-current driven chip, and input filter capacitor is connected between the positive pole and ground of direct-flow input end; Output filter capacitor is connected between the positive pole and negative pole of dc output end, the negative pole of a termination dc output end of choke induction, the output switching terminal of another termination LED constant-current driven chip; The earth terminal ground connection of LED constant-current driven chip.
Above-described LED constant-current driving power supply, described constant flow module comprises Schottky diode, and the anode of said Schottky diode connects the output switching terminal of LED constant-current driven chip, and negative electrode connects the positive pole of direct-flow input end.
Above-described LED constant-current driving power supply, described constant flow module comprises current sampling resistor, the positive pole of a termination direct-flow input end of current sampling resistor, the current detecting end of another termination LED constant-current driven chip and the positive pole of dc output end.
Above-described LED constant-current driving power supply comprises voltage-stabiliser tube, the negative electrode of the brightness adjustment control termination voltage-stabiliser tube of each constant flow module LED constant-current driven chip, the plus earth of voltage-stabiliser tube.
Above-described LED constant-current driving power supply comprises that transient voltage suppresses diode, and the negative electrode of transient voltage inhibition diode connects the positive pole of direct-flow input end, plus earth.
Above-described LED constant-current driving power supply, described LED constant-current driven chip are that constant current, step-down type dc are to direct current transducer.
Above-described LED constant-current driving power supply, the model of said LED constant-current driven chip are MBI 6661G chips.
The utility model LED constant-current driving power supply is exported to each lamp bar respectively after the output current of each road constant flow module is adjusted to fixing current value, forms the power supply of multiple constant current source.Under the enough situation of dc power supply power, the electric current of each road output of multiple constant current module does not receive the influence of lamp bar voltage, does not exist because of the different problems of shunt inequality of tube voltage drop.Can guarantee the useful life of LED lamp bar effectively.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the theory diagram of the utility model LED constant-current driving power supply.
Fig. 2 is the circuit theory diagrams of the utility model LED constant-current driving power supply embodiment.
[embodiment]
As shown in Figure 1; The utility model LED constant-current driving power supply comprises n constant flow module, and n constant flow module all comprises dc output end separately, and the dc output end of each constant flow module connects 1 LED lamp bar; The input parallel connection of n constant flow module connects 1 AC/DC DC power supply altogether.N constant flow module forms the power supply of multiple constant current source.Under the enough situation of AC/DC DC power supply power, the electric current of each road output of n road constant flow module does not receive the influence of lamp bar voltage, does not exist because of the different problems of shunt inequality of each lamp bar tube voltage drop.Can guarantee the useful life of LED lamp bar effectively.
The embodiment of the utility model LED constant-current driving power supply is as shown in Figure 2, comprises 4 constant flow modules, because of the structure of 4 constant flow modules is identical, below is that example is described with the 1st constant flow module only.
The anodal VIN of power supply direct-flow input end meets the power voltage terminal Vin of LED constant-current driven chip U1, and input filter capacitor C1, C2 are connected between the anodal VIN and ground GND of direct-flow input end.Output filter capacitor C3 is connected between the anodal LED1+ and negative pole LED1-of dc output end, the negative pole LED1-of the termination dc output end of choke induction L1, the output switching terminal SW of another termination LED constant-current driven chip U1.The earth terminal GND ground connection of LED constant-current driven chip U1.
The anode of Schottky diode D1 meets the output switching terminal SW of LED constant-current driven chip U1, and negative electrode meets the anodal VIN of direct-flow input end.
The anodal VIN of the termination direct-flow input end of current sampling resistor R1, the current detecting end SEN of another termination LED constant-current driven chip U1 and the anodal LED1+ of dc output end.
The brightness adjustment control end Dim of each constant flow module LED constant-current driven chip U1 to U4 connects the negative electrode of voltage-stabiliser tube ZD, the plus earth of voltage-stabiliser tube ZD.
The negative electrode of transient voltage inhibition diode TVS connects the anodal VIN of direct-flow input end, plus earth.
Each constant flow module LED constant-current driven chip U1 to U4 is that constant current, step-down type dc are to direct current transducer MBI6661 chip.
The above embodiment of the utility model LED constant-current driving power supply exports to each lamp bar respectively after through voltage-stabiliser tube the output current of each road constant flow module being controlled to fixing current value, forms the power supply of multiple constant current source.Under the enough situation of power; The electric current of each road of multiple constant current module output does not receive the influence of lamp bar voltage, and each road is independent of each other, and does not exist because of the different problems of shunt inequality of tube voltage drop; LED can not transship, and can improve the useful life of LED lamp bar effectively.
Claims (8)
1. a LED constant-current driving power supply is characterized in that, comprises a plurality of constant flow modules, and described constant flow module comprises dc output end separately, a plurality of constant flow module common dc inputs.
2. LED constant-current driving power supply according to claim 1; It is characterized in that; Described constant flow module comprises the LED constant-current driven chip; Output filter capacitor, choke induction and input filter capacitor, the positive pole of direct-flow input end connects the power voltage terminal of LED constant-current driven chip, and input filter capacitor is connected between the positive pole and ground of direct-flow input end; Output filter capacitor is connected between the positive pole and negative pole of dc output end, the negative pole of a termination dc output end of choke induction, the output switching terminal of another termination LED constant-current driven chip; The earth terminal ground connection of LED constant-current driven chip.
3. LED constant-current driving power supply according to claim 2 is characterized in that described constant flow module comprises Schottky diode, and the anode of said Schottky diode connects the output switching terminal of LED constant-current driven chip, and negative electrode connects the positive pole of direct-flow input end.
4. LED constant-current driving power supply according to claim 2; It is characterized in that; Described constant flow module comprises current sampling resistor, the positive pole of a termination direct-flow input end of current sampling resistor, the current detecting end of another termination LED constant-current driven chip and the positive pole of dc output end.
5. LED constant-current driving power supply according to claim 2 is characterized in that, comprises voltage-stabiliser tube, the negative electrode of the brightness adjustment control termination voltage-stabiliser tube of each constant flow module LED constant-current driven chip, the plus earth of voltage-stabiliser tube.
6. LED constant-current driving power supply according to claim 2 is characterized in that, comprises that transient voltage suppresses diode, and the negative electrode of transient voltage inhibition diode connects the positive pole of direct-flow input end, plus earth.
7. LED constant-current driving power supply according to claim 2 is characterized in that, described LED constant-current driven chip is that constant current, step-down type dc are to direct current transducer.
8. LED constant-current driving power supply according to claim 2 is characterized in that, the model of said LED constant-current driven chip is the MBI6661G chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201768363U CN202551455U (en) | 2012-04-24 | 2012-04-24 | LED (Light-Emitting Diode) constant-current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201768363U CN202551455U (en) | 2012-04-24 | 2012-04-24 | LED (Light-Emitting Diode) constant-current driving power supply |
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| CN202551455U true CN202551455U (en) | 2012-11-21 |
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| CN2012201768363U Expired - Fee Related CN202551455U (en) | 2012-04-24 | 2012-04-24 | LED (Light-Emitting Diode) constant-current driving power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179757A (en) * | 2013-03-25 | 2013-06-26 | 浙江海振电子科技有限公司 | Time-sharing multi-path constant current driving light emitting diode (LED) lamp |
| CN105357825A (en) * | 2015-11-24 | 2016-02-24 | 广州市佛达信号设备有限公司 | 10-100V drive circuit for LED light fixture |
| CN107064825A (en) * | 2017-06-08 | 2017-08-18 | 常东记 | A kind of LED multifunctional testers |
-
2012
- 2012-04-24 CN CN2012201768363U patent/CN202551455U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179757A (en) * | 2013-03-25 | 2013-06-26 | 浙江海振电子科技有限公司 | Time-sharing multi-path constant current driving light emitting diode (LED) lamp |
| CN103179757B (en) * | 2013-03-25 | 2015-07-08 | 浙江海振电子科技有限公司 | Time-sharing multi-path constant current driving light emitting diode (LED) lamp |
| CN105357825A (en) * | 2015-11-24 | 2016-02-24 | 广州市佛达信号设备有限公司 | 10-100V drive circuit for LED light fixture |
| CN107064825A (en) * | 2017-06-08 | 2017-08-18 | 常东记 | A kind of LED multifunctional testers |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000, Guangdong, Shenzhen, Baoan District Fuyong Han Industrial Park 4 Patentee after: Shenzhen Yaham Optoelectronics Co., Ltd. Patentee after: Beijing Yun Xingyu transport science and techonologies incorporated company Address before: 518000, Guangdong, Shenzhen, Baoan District Fuyong Han Industrial Park 4 Patentee before: Shenzhen Yaham Optoelectronics Co., Ltd. Patentee before: Beijing Yunxingyu Traffic Engineering Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20160424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |