CN204994035U - LED drive arrangement that can switch - Google Patents
LED drive arrangement that can switch Download PDFInfo
- Publication number
- CN204994035U CN204994035U CN201520801789.0U CN201520801789U CN204994035U CN 204994035 U CN204994035 U CN 204994035U CN 201520801789 U CN201520801789 U CN 201520801789U CN 204994035 U CN204994035 U CN 204994035U
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- CN
- China
- Prior art keywords
- resistance
- termination
- npn pipe
- pmos
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a LED drive arrangement that can switch. LED drive arrangement that can switch includes switch button, first resistance, first electric capacity, a NPN pipe, second resistance, a PMOS pipe, third resistance and LED lamp.
Description
Technical field
The utility model relates to LED drive device.
Background technology
In order to the LED that can realize on off state drives, devise a kind of can the LED drive device of switch.
Summary of the invention
The utility model aim to provide a kind of can the LED drive device of switch.
Can the LED drive device of switch, comprise switch key, the first resistance, the first electric capacity, a NPN pipe, the second resistance, the first PMOS, the 3rd resistance and LED:
One termination supply voltage VCC of described switch key, one end of the first resistance described in another termination;
One end of switch key described in one termination of described first resistance, one end of the first electric capacity described in another termination and the base stage of a described NPN pipe;
One end of first resistance described in one termination of described first electric capacity and the base stage of a described NPN pipe, other end ground connection;
The base stage of a described NPN pipe connects one end of described first resistance and one end of described first electric capacity, and collector electrode connects one end of described second resistance and the grid of described first PMOS, grounded emitter;
One termination supply voltage VCC of described second resistance, the collector electrode of a NPN pipe described in another termination and the grid of described first PMOS;
The grid of described first PMOS connects one end of described second resistance and the collector electrode of a described NPN pipe, and drain electrode connects one end of described 3rd resistance, and source electrode meets supply voltage VCC;
The drain electrode of the first PMOS described in one termination of described 3rd resistance, the P pole of LED described in another termination;
The P pole of described LED connects one end of described 3rd resistance, N pole ground connection.
Conducting when described switch key is pressed, the normal work of a described NPN pipe, have electric current to export, the collector electrode of a described like this NPN pipe drags down, and the grid of described first PMOS drags down and conducting, has output current to drive described LED; Not conducting when described switch key is not pressed, does not have output current to drive described LED; Described first electric capacity is to prevent supply voltage VCC from impacting the base stage of a described NPN pipe.
Accompanying drawing explanation
Fig. 1 be of the present utility model a kind of can the circuit diagram of LED drive device of switch.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
Can the LED drive device of switch, as shown in Figure 1, comprise switch key 10, first resistance 20, first electric capacity 30, NPN pipe 40, second resistance 50, first PMOS 60, the 3rd resistance 70 and LED 80:
One termination supply voltage VCC of described switch key 10, one end of the first resistance 20 described in another termination;
One end of switch key 10 described in one termination of described first resistance 20, one end of the first electric capacity 30 described in another termination and the base stage of a described NPN pipe 40;
One end of first resistance 20 described in one termination of described first electric capacity 30 and the base stage of a described NPN pipe 40, other end ground connection;
The base stage of a described NPN pipe 40 connects one end of described first resistance 20 and one end of described first electric capacity 30, and collector electrode connects one end of described second resistance 50 and the grid of described first PMOS 60, grounded emitter;
One termination supply voltage VCC of described second resistance 50, the collector electrode of a NPN pipe 40 described in another termination and the grid of described first PMOS 60;
The grid of described first PMOS 60 connects one end of described second resistance 50 and the collector electrode of a described NPN pipe 40, and drain electrode connects one end of described 3rd resistance 70, and source electrode meets supply voltage VCC;
The drain electrode of the first PMOS 60 described in one termination of described 3rd resistance 70, the P pole of LED 80 described in another termination;
The P pole of described LED 80 connects one end of described 3rd resistance 70, N pole ground connection.
Conducting when described switch key 10 is pressed, a described NPN pipe 40 normally works, and has electric current to export, and the collector electrode of a described like this NPN pipe 40 drags down, and the grid of described first PMOS 60 drags down and conducting, has output current to drive described LED 80; Not conducting when described switch key 10 is not pressed, does not have output current to drive described LED 80; Described first electric capacity 30 is to prevent supply voltage VCC from impacting the base stage of a described NPN pipe 40.
Claims (1)
1. can the LED drive device of switch, it is characterized in that: comprise switch key, the first resistance, the first electric capacity, a NPN pipe, the second resistance, the first PMOS, the 3rd resistance and LED;
One termination supply voltage VCC of described switch key, one end of the first resistance described in another termination;
One end of switch key described in one termination of described first resistance, one end of the first electric capacity described in another termination and the base stage of a described NPN pipe;
One end of first resistance described in one termination of described first electric capacity and the base stage of a described NPN pipe, other end ground connection;
The base stage of a described NPN pipe connects one end of described first resistance and one end of described first electric capacity, and collector electrode connects one end of described second resistance and the grid of described first PMOS, grounded emitter;
One termination supply voltage VCC of described second resistance, the collector electrode of a NPN pipe described in another termination and the grid of described first PMOS;
The grid of described first PMOS connects one end of described second resistance and the collector electrode of a described NPN pipe, and drain electrode connects one end of described 3rd resistance, and source electrode meets supply voltage VCC;
The drain electrode of the first PMOS described in one termination of described 3rd resistance, the P pole of LED described in another termination;
The P pole of described LED connects one end of described 3rd resistance, N pole ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520801789.0U CN204994035U (en) | 2015-10-15 | 2015-10-15 | LED drive arrangement that can switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520801789.0U CN204994035U (en) | 2015-10-15 | 2015-10-15 | LED drive arrangement that can switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204994035U true CN204994035U (en) | 2016-01-20 |
Family
ID=55128351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520801789.0U Expired - Fee Related CN204994035U (en) | 2015-10-15 | 2015-10-15 | LED drive arrangement that can switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204994035U (en) |
-
2015
- 2015-10-15 CN CN201520801789.0U patent/CN204994035U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20160120 Termination date: 20161015 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |