CN104270856A - Novel LED drive circuit - Google Patents
Novel LED drive circuit Download PDFInfo
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- CN104270856A CN104270856A CN201410476762.9A CN201410476762A CN104270856A CN 104270856 A CN104270856 A CN 104270856A CN 201410476762 A CN201410476762 A CN 201410476762A CN 104270856 A CN104270856 A CN 104270856A
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- diode
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- led
- power supply
- amc7135
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Abstract
The invention discloses a novel LED drive circuit which comprises a power supply, a switch circuit, a first diode D1, an LED and an AMC7135 chip. The power supply is connected with the switch circuit, the switch circuit is connected with the AMC7135 VDD end through the first diode D1, the switch circuit is connected with the public end of the first diode D1 and one end of the LED, the other end of the LED is connected with the AMC7135 OUT end, and the AMC7135 GDD end is grounded. The novel LED drive circuit further comprises an alarm circuit, wherein the alarm circuit consists of an alarming horn, a resistor R and a second diode D1. The novel LED drive circuit can guarantee that an LED lamp is stable in brightness and is provided with the alarm circuit, the alarming horn sends out alarm sound under the situation that electric poles of the power supply are connected reversely, a user is reminded to timely correct the electric poles of the power supply, and the novel LED drive circuit is simple in structure, low in cost and convenient to popularize and use.
Description
Technical field
The present invention relates to a kind of New LED drive circuit.
Background technology
Light-emitting diode abbreviation LED, LED are a kind of can be the solid-state semiconductor device of visible ray by electric energy conversion.When electric current flows through LED, electronics and hole compound and send monochromatic light in LED, this is electroluminescent effect.In daily life, along with the fast development of LED, the chance that people touch LED product gets more and more.With the LED lamp that LED makes have that volume is little, power consumption is low, high brightness, the advantage such as low in calories, energy-conserving and environment-protective, very popular.
By resistance-capacitance depressurization, traditional LED type of drive mainly adds that the form that a this constant voltage of voltage stabilizing didoe drives exists, the mode of this driving LED has the following disadvantages: (1) efficiency is low, dropping resistor consumes a large amount of electric energy, even may exceed the electric energy that LED consumes; (2) cannot provide large driven current density, because electric current is larger, the electric energy consumed on dropping resistor is larger; (3) ability of burning voltage, cannot ensure that the electric current by LED is no more than the normal operating value of LED, and all can adopt during deisgn product and reduce LED both end voltage to supply electric drive, this is to reduce LED luminance for cost.At present, market has also occurred some good drive circuits, but general this kind of circuit price is higher, is not suitable for promoting the use of.Therefore be necessary to design that a kind of cost is lower, the good LED drive circuit of driveability.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of lower-cost LED drive circuit is provided, constant output current, ensure that LED normally works, arrange alarm element, can send chimes of doom when power electrode connects anti-, reminding user electrode connects instead, be convenient to user and change power electrode direction in time, avoid circuit malfunctions.
The object of the invention is to be achieved through the following technical solutions:
Provide a kind of New LED drive circuit, it is characterized in that: comprise power supply, switching circuit, the first diode (D1), LED and AMC7135 chip, described power supply is connected with described switching circuit, described switching circuit is connected with the vdd terminal of described AMC7135 chip by described first diode (D1), described switching circuit is connected with one end of described LED with the common port of described first diode (D1), the other end of described LED is held with the OUT of described AMC7135 chip and is connected, and the GDD of described AMC7135 chip holds ground connection.
In one embodiment of the present of invention, also comprise warning circuit, described warning circuit comprises alarming horn, resistance (R) and the second diode (D2), and one end of described alarming horn is connected with described second diode (D2) by described resistance (R), and the other end is connected with power supply; Described power supply is connected with described switching circuit and described second diode (D2).
In one embodiment of the present of invention, described first diode (D1) is 1N4148.
The invention has the beneficial effects as follows:
1) drive circuit uses AMC7135 chip, and AMC7135 is a low voltage difference flow straightener, its driving current constant exported, and ensured that LED luminance is stable, normally worked, AMC7135 has low voltage difference, low quiescent current characteristic, extends the service time of power supply;
2), in actual use, occasional runs into user by situation anti-loaded for power supply positive and negative terminal polarity.Therefore the present invention designs alarming horn, when power supply positive and negative terminal reverse polarity connection, alarming horn sends chimes of doom, remind the positive and negative terminal reverse polarity connection of user's power supply, be convenient to user and change power electrode direction in time, avoid circuit malfunctions, and the present invention arranges a first diode D1 at the vdd terminal of AMC7135 chip, to prevent circuit malfunctions, prevent power positive cathode from connecing inverse time power supply energy simultaneously and consumed fast;
3) structure of the present invention is simple, and cost is lower, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of the drive circuit of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, a kind of New LED drive circuit, it comprises power supply, switching circuit, first diode D1, LED and AMC7135 chip, power supply is connected with switching circuit, switching circuit is connected by the vdd terminal of the first diode D1 and AMC7135, switching circuit is connected with one end of LED with the common port of the first diode D1, and the other end of LED is held with the OUT of AMC7135 and is connected, and the GDD of AMC7135 holds ground connection.
The present invention also comprises warning circuit, warning circuit comprises alarming horn, resistance R and the second diode D1, one end of alarming horn is connected with the second diode D1 by resistance R, and the other end of alarming horn is connected with power supply, and power supply is connected with the second diode D1 with the common port of switching circuit.Warning circuit is connected separately with power supply, and when electric power polarity is correct, warning circuit no current passes through, and therefore alarming horn can not be sounded; When electric power polarity connects inverse time, warning circuit conducting, alarming horn sends chimes of doom, and therefore the present invention has warning function, can remind the positive and negative terminal reverse polarity connection of user's power supply.
The first described diode D1 is 1N4148.
The above is only the preferred embodiment of the present invention, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection range of claims of the present invention.
Claims (3)
1. a New LED drive circuit, it is characterized in that: comprise power supply, switching circuit, the first diode (D1), LED and AMC7135 chip, described power supply is connected with described switching circuit, described switching circuit is connected with the vdd terminal of described AMC7135 chip by described first diode (D1), described switching circuit is connected with one end of described LED with the common port of described first diode (D1), the other end of described LED is held with the OUT of described AMC7135 chip and is connected, and the GDD of described AMC7135 chip holds ground connection.
2. circuit as claimed in claim 1, it is characterized in that: also comprise warning circuit, described warning circuit comprises alarming horn, resistance (R) and the second diode (D2), one end of described alarming horn is connected with described second diode (D2) by described resistance (R), and the other end is connected with power supply; Described power supply is connected with described switching circuit and described second diode (D2).
3. circuit as claimed in claim 1, is characterized in that: described first diode (D1) is 1N4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476762.9A CN104270856A (en) | 2014-09-18 | 2014-09-18 | Novel LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476762.9A CN104270856A (en) | 2014-09-18 | 2014-09-18 | Novel LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104270856A true CN104270856A (en) | 2015-01-07 |
Family
ID=52162318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410476762.9A Pending CN104270856A (en) | 2014-09-18 | 2014-09-18 | Novel LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104270856A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916327Y (en) * | 2006-04-27 | 2007-06-27 | 张胜利 | Mining lamp with flasher |
| CN200982538Y (en) * | 2006-12-01 | 2007-11-28 | 北京紫光光电科技有限公司 | Lithium battery double-light source intelligent miner's lamp |
| CN202501203U (en) * | 2012-01-17 | 2012-10-24 | 南京化工职业技术学院 | Multipurpose electric torch |
| CN203675378U (en) * | 2013-12-26 | 2014-06-25 | 广东卓耐普智能技术股份有限公司 | Constant current driving LED circuit |
-
2014
- 2014-09-18 CN CN201410476762.9A patent/CN104270856A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916327Y (en) * | 2006-04-27 | 2007-06-27 | 张胜利 | Mining lamp with flasher |
| CN200982538Y (en) * | 2006-12-01 | 2007-11-28 | 北京紫光光电科技有限公司 | Lithium battery double-light source intelligent miner's lamp |
| CN202501203U (en) * | 2012-01-17 | 2012-10-24 | 南京化工职业技术学院 | Multipurpose electric torch |
| CN203675378U (en) * | 2013-12-26 | 2014-06-25 | 广东卓耐普智能技术股份有限公司 | Constant current driving LED circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |