CN103607813A - LED lamp constant current driver - Google Patents
LED lamp constant current driver Download PDFInfo
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- CN103607813A CN103607813A CN201310544062.4A CN201310544062A CN103607813A CN 103607813 A CN103607813 A CN 103607813A CN 201310544062 A CN201310544062 A CN 201310544062A CN 103607813 A CN103607813 A CN 103607813A
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- led lamp
- constant current
- voltage
- current driver
- resistance
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Abstract
The invention discloses an LED lamp constant current driver which comprises a casing, an LED lamp and a driving circuit. The LED lamp constant current driver is characterized in that 220V is subjected to bridge rectification and then DC voltage is outputted, according to the driving circuit, a constant current resistor R1 and a CRD constant current diode are used, a CE1 is a step-down capacitor, a resistance capacitance step-down circuit is formed, the controlling is carried out through resistance capacitance step-down, the LED lamp constant current driver is corresponding to an output occasion of low voltage, and the LED lamp constant current driver has the advantages of scientific and reasonable design, simple driving circuit, less components, high reliability, and low cost.
Description
Technical field
The invention belongs to a kind of decorating lighting lamp, relate to a kind of high-power LED light source energy-saving lamp.
Background technology
LED wall lamp is again line style LED flood light etc., because its profile strip, also there is people that it is called to LED line lamp, mainly only to use for doing building decoration illumination, be used in addition sketching the contours the profile of heavy construction, traditional prior art is all with power supply of single configuration, and manufacture process bothers relatively, and use is the not easy-maintaining damaging.So make attendant's workload increase, the numerous prices of the similar LED light fixture of existing market kind are also relatively costly, the fail safe of using at product and all process imperfection in short problem the useful life of product, can not be fully and lifetime of LED match, lack a kind of deficiencies such as power supply of long service life.
Summary of the invention
The object of the invention is, for the deficiencies in the prior art, proposes a kind of LED lamp constant-flow driver.
LED lamp constant-flow driver of the present invention, comprise housing, LED lamp, drive circuit forms, and it is characterized in that: 220V its output dc voltage after bridge rectifier, its drive circuit utilizes constant current resistance R1, CRD current regulator diode, CE1 is decompression capacitor, forms capacitance-resistance voltage reduction circuit, by capacitance-resistance pressure drop, control, to tackle the output occasion of low-voltage.
The present invention's beneficial effect compared with prior art: have design science, reasonable, drive circuit simple Devices is few, reliability is strong, low cost and other advantages.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described, but embodiments of the present invention are not limited to this.
Fig. 1-circuit diagram
In figure: CE1 is decompression capacitor, D1, D2, D3, D4 is bridge rectifier diode, CRD current regulator diode, LED light lamp LEDO, LEDX, R1, R2 resistance.
Embodiment
As shown in Figure 1: CE1 is decompression capacitor, D1, D2, D3, D4 is bridge rectifier diode, CRD current regulator diode, LED light lamp LEDO, LEDX, R1, R2 resistance.
LED lamp constant-flow driver of the present invention, comprise housing, LED lamp, drive circuit forms, and it is characterized in that: 220V its output dc voltage after bridge rectifier, its drive circuit utilizes constant current resistance R1, CRD current regulator diode, CE1 is decompression capacitor, forms capacitance-resistance voltage reduction circuit, by capacitance-resistance pressure drop, control, to tackle the output occasion of low-voltage.
Circuit working principle
Desirable constant-current source is that a kind of internal resistance is infinitely-great device, no matter why its both end voltage is worth, its electric current of flowing through is forever constant.Certain this device is impossible exist.Actual current regulator diode is equivalent to one, and in certain operating voltage range, its internal resistance is Z, and electric capacity in parallel is approximately 4-10pF.; It has one section of constant current interval in some voltage ranges, and in this interval, the electric current of flowing through is almost constant, and VL is for arriving the magnitude of voltage of IL, and IL is approximately 0.8Ip..
Application scenario is adjusted: because current regulator diode needs certain voltage Vk, can enter constant current, the supply voltage that institute's ether is low cannot be worked.So this Vk adopts battery powered LED to work about 5-10V left and right great majority greatly conventionally, maximum current is because the power consumption of current regulator diode is restricted, so excessive electric current is also inappropriate.For example the LED of 1W needs 350mA conventionally, and current regulator diode is just difficult to provide, and at present proper use occasion is exactly that to adopt a lot of low-power LEDs namely situation of high voltage-small current of connecting be the most suitable for the LED light fixture of electric main power supply; So but due to current regulator diode withstand voltage have certain restriction it absorbent mains voltage variations be also limited.Just by the withstand voltage CRD of 100V, be used in 220V mains supply and all can only tackle limited change in voltage.If 220V its output dc voltage after bridge rectifier is approximately 264V. civil power, changes+10%～-15% to be just equivalent to after rectification be 290～187V, change in voltage 103V. has surpassed that it is withstand voltage.So because the non-linear very difficult of LED voltage-current characteristic represents with formula.When line voltage reduces, the electric current in LED will reduce with the reduction of line voltage in a word.Its brightness also can and then become, and the application circuit of resistance-capacitance depressurization can be tackled the output occasion of low-voltage.
The present invention, because device is few, largely reduces product bug, manufacture simple, from the cost calculation of power material, than at the bottom of prior art more than 10 times.
Claims (1)
1. a LED lamp constant-flow driver, comprise housing, LED lamp, drive circuit forms, and it is characterized in that: 220V its output dc voltage after bridge rectifier, its drive circuit utilizes constant current resistance R1, CRD current regulator diode, CE1 is decompression capacitor, forms capacitance-resistance voltage reduction circuit, by capacitance-resistance pressure drop, control, to tackle the output occasion of low-voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544062.4A CN103607813A (en) | 2013-11-06 | 2013-11-06 | LED lamp constant current driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544062.4A CN103607813A (en) | 2013-11-06 | 2013-11-06 | LED lamp constant current driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103607813A true CN103607813A (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310544062.4A Pending CN103607813A (en) | 2013-11-06 | 2013-11-06 | LED lamp constant current driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103607813A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090184669A1 (en) * | 2007-07-30 | 2009-07-23 | Ge Investment Co., Ltd. | Light emitting diode lamp |
| CN201851924U (en) * | 2010-10-15 | 2011-06-01 | 陈聪辉 | Improved LED lamp |
| CN201925768U (en) * | 2010-12-14 | 2011-08-10 | 德清新明辉电光源有限公司 | LED lamp |
-
2013
- 2013-11-06 CN CN201310544062.4A patent/CN103607813A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090184669A1 (en) * | 2007-07-30 | 2009-07-23 | Ge Investment Co., Ltd. | Light emitting diode lamp |
| CN201851924U (en) * | 2010-10-15 | 2011-06-01 | 陈聪辉 | Improved LED lamp |
| CN201925768U (en) * | 2010-12-14 | 2011-08-10 | 德清新明辉电光源有限公司 | LED lamp |
Non-Patent Citations (1)
| Title |
|---|
| 维库电子: "小功率LED驱动电源技术拓扑方案", 《HTTP://POWER.CNLEDW.COM/TECH/NEWSDETAIL-32778.HTML》, 27 December 2012 (2012-12-27), pages 1 - 6 * |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140226 |