CN202085367U - Light emitting diode (LED) constant-current driving power supply - Google Patents
Light emitting diode (LED) constant-current driving power supply Download PDFInfo
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- CN202085367U CN202085367U CN201120196107XU CN201120196107U CN202085367U CN 202085367 U CN202085367 U CN 202085367U CN 201120196107X U CN201120196107X U CN 201120196107XU CN 201120196107 U CN201120196107 U CN 201120196107U CN 202085367 U CN202085367 U CN 202085367U
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- led
- driving power
- power supply
- current driving
- constant
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Abstract
The utility model discloses a light emitting diode (LED) constant-current driving power supply, which is provided with an operation amplifier between a feed back end (FB) and a sampling resistor (RSET). Through the implementation of the technical scheme, the power consumption of the LED driving power supply can be reduced.
Description
Technical field
The utility model relates to the LED power technique fields, relates in particular to a kind of LED constant-current driving power supply.
Background technology
At present,, have negative temperature characteristic again, thereby in application process, need it is carried out steady-working state and protection, thereby produced the notion that drives because LED is the semiconductor device of characteristic sensitivity.Near harshness, LED can directly connect the electric main of 220V unlike common incandescent lamp bulb to the LED device to the requirement of driving power.LED is 2～3 volts a low voltage drive, must design complicated translation circuit, and the LED lamp of different purposes will be equipped with different power supply adaptors.
LED of the prior art all adopts DC driven, therefore needing to add a power supply adaptor between civil power and LED is the LED driving power, its function is the direct current that electric main is converted to suitable LED, but the power consumption of the LED driving power of prior art scheme is excessive.
Summary of the invention
The purpose of this utility model provides a kind of LED constant-current driving power supply, can reduce the power consumption of LED driving power.
The purpose of this utility model is achieved through the following technical solutions:
A kind of LED constant-current driving power supply, described LED constant-current driving power supply are provided with an operational amplifier between feedback end FB and sampling resistor RSET.
The technical scheme that provides by above-mentioned the utility model as can be seen, described LED constant-current driving power supply is provided with an operational amplifier between feedback end FB and sampling resistor RSET.Just can reduce the power consumption of LED driving power by the enforcement of this technical scheme.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The electrical block diagram of the LED constant-current driving power supply that Fig. 1 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills belong to protection range of the present utility model not making the every other embodiment that is obtained under the creative work prerequisite.
Below in conjunction with accompanying drawing the utility model embodiment is described in further detail, is illustrated in figure 1 as the electrical block diagram of the LED constant-current driving power supply that the utility model embodiment provides, among Fig. 1:
The LED constant-current driving power supply is placed an operational amplifier between feedback end FB and sampling resistor RSET, obtain voltage on the sampling resistor RSET by this operational amplifier, just can constitute complete, a high efficiency high power LED constant-current driving circuit in conjunction with other resistance and electric capacity.
By above-mentioned setting, just can be when guaranteeing that LED obtains the constant current power supply, the power consumption of RSET is reduced to the acceptable level, thereby makes the voltage at LED two ends big as far as possible, the electric current of flowing through is also big as far as possible, thereby reduces the power consumption of LED driving power.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (1)
1. a LED constant-current driving power supply is characterized in that, described LED constant-current driving power supply is provided with an operational amplifier between feedback end FB and sampling resistor RSET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120196107XU CN202085367U (en) | 2011-06-13 | 2011-06-13 | Light emitting diode (LED) constant-current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120196107XU CN202085367U (en) | 2011-06-13 | 2011-06-13 | Light emitting diode (LED) constant-current driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202085367U true CN202085367U (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120196107XU Expired - Fee Related CN202085367U (en) | 2011-06-13 | 2011-06-13 | Light emitting diode (LED) constant-current driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202085367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219812A (en) * | 2013-05-30 | 2014-12-17 | 深圳市海洋王照明工程有限公司 | Constant current sampling circuit and lamp thereof |
-
2011
- 2011-06-13 CN CN201120196107XU patent/CN202085367U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219812A (en) * | 2013-05-30 | 2014-12-17 | 深圳市海洋王照明工程有限公司 | Constant current sampling circuit and lamp thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20160613 |