CN109152146A - LED illumination driving circuit - Google Patents
LED illumination driving circuit Download PDFInfo
- Publication number
- CN109152146A CN109152146A CN201811152777.4A CN201811152777A CN109152146A CN 109152146 A CN109152146 A CN 109152146A CN 201811152777 A CN201811152777 A CN 201811152777A CN 109152146 A CN109152146 A CN 109152146A
- Authority
- CN
- China
- Prior art keywords
- pipe
- collector
- resistor
- base stage
- resistance
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of LED illumination driving circuits.LED illumination driving circuit includes switch key, first resistor, second resistance, the first PNP pipe, the first NPN pipe, 3rd resistor, the second PNP pipe and LED light.It can be energy saving when closed without quiescent current using LED illumination driving circuit provided by the invention.
Description
Technical field
The present invention relates to electronic technology field more particularly to LED illumination driving circuits.
Background technique
The driving circuit of the prior art has quiescent dissipation, and the one side energy is unnecessarily lost, another aspect conversion ratio drop
It is low；In order to reach idle when LED light is closed, the LED illumination driving circuit without quiescent current when devising closing.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, provide a kind of LED illumination driving circuit.
LED illumination driving circuit, including switch key, first resistor, second resistance, the first PNP pipe, the first NPN pipe, the
Three resistance, the second PNP pipe and LED light:
One termination supply voltage VCC of the switch key, one end of another termination first resistor；The first resistor
One end of the one termination switch key, one end of another termination second resistance and the base stage of the first NPN pipe；It is described
One end of the one termination first resistor of second resistance and the base stage of the first NPN pipe, other end ground connection；Described first
The base stage and collector of PNP pipe are connected together and connect the collector of the first NPN pipe and the base stage of second PNP pipe again, hair
Emitter-base bandgap grading meets supply voltage VCC；The base stage of the first NPN pipe connect the first resistor one end and the second resistance one
End, collector connect the base stage of first PNP pipe and the base stage of collector and second PNP pipe, and emitter connects the third
One end of resistance；The emitter of one termination the first NPN pipe of the 3rd resistor, other end ground connection；Second PNP pipe
Base stage connect the collector of the first NPN pipe and the base stage and collector of first PNP pipe, collector connects the LED light
The pole P, emitter meets supply voltage VCC；The pole P of the LED light connects the collector of second PNP pipe, the pole N ground connection.
When the switch key is pressed, supply voltage is by the switch key of conducting by the first resistor and described the
Two electric resistance partial pressures obtain the base voltage of the first NPN pipe, and then obtain the collector current of the first NPN pipe, then lead to
The collector that the first PNP pipe mirror image is crossed to second PNP pipe drives the LED light；When the switch key is not pressed
When lower, just there is no electric current in the first resistor and the second resistance, the first NPN pipe does not just work, and then without electricity
Stream driving LED light, entire driving circuit all exist without electric current.
Detailed description of the invention
Fig. 1 is the circuit diagram of LED illumination driving circuit of the invention.
Specific embodiment
The content of present invention is further illustrated below in conjunction with attached drawing.
LED illumination driving circuit, as shown in Figure 1, including switch key 101, first resistor 102, second resistance 103, the
One PNP pipe 104, the first NPN pipe 105,3rd resistor 106, the second PNP pipe 107 and LED light 108:
One termination supply voltage VCC of the switch key 101, one end of another termination first resistor 102；Described first
One end of the one termination switch key 101 of resistance 102, one end and described first of another termination second resistance 103
The base stage of NPN pipe 105；One end of the one termination first resistor 102 of the second resistance 103 and the first NPN pipe 105
Base stage, the other end ground connection；The base stage and collector of first PNP pipe 104 are connected together connects the first NPN pipe 105 again
Collector and second PNP pipe 107 base stage, emitter meets supply voltage VCC；The base stage of the first NPN pipe 105 connects
One end of the first resistor 102 and one end of the second resistance 103, collector connect first PNP pipe 104 base stage and
The base stage of collector and second PNP pipe 107, emitter connect one end of the 3rd resistor 106；The 3rd resistor 106
Termination a first NPN pipe 105 emitter, other end ground connection；The base stage of second PNP pipe 107 connects described first
The base stage and collector of the collector of NPN pipe 105 and first PNP pipe 104, collector connect the pole P of the LED light 108, hair
Emitter-base bandgap grading meets supply voltage VCC；The pole P of the LED light 108 connects the collector of second PNP pipe 107, the pole N ground connection.
When the switch key 101 is pressed, supply voltage is by the switch key of conducting by 102 He of first resistor
The partial pressure of second resistance 103 obtains the base voltage of the first NPN pipe 105, and then obtains the first NPN pipe 105
Collector current, then by 104 mirror image of the first PNP pipe to the collector driving LED light of second PNP pipe 107
108；When the switch key 101 is not pressed, just there is no electric current in the first resistor 102 and the second resistance 103,
The first NPN pipe 105 does not just work, and then drives LED light without electric current, and entire driving circuit all exists without electric current.
Claims (1)
1.LED illumination driving circuit, it is characterised in that: including switch key, first resistor, second resistance, the first PNP pipe,
First NPN pipe, 3rd resistor, the second PNP pipe and LED light；
One termination supply voltage VCC of the switch key, one end of another termination first resistor；The first resistor
One end of the one termination switch key, one end of another termination second resistance and the base stage of the first NPN pipe；It is described
One end of the one termination first resistor of second resistance and the base stage of the first NPN pipe, other end ground connection；Described first
The base stage and collector of PNP pipe are connected together and connect the collector of the first NPN pipe and the base stage of second PNP pipe again, hair
Emitter-base bandgap grading meets supply voltage VCC；The base stage of the first NPN pipe connect the first resistor one end and the second resistance one
End, collector connect the base stage of first PNP pipe and the base stage of collector and second PNP pipe, and emitter connects the third
One end of resistance；The emitter of one termination the first NPN pipe of the 3rd resistor, other end ground connection；Second PNP pipe
Base stage connect the collector of the first NPN pipe and the base stage and collector of first PNP pipe, collector connects the LED light
The pole P, emitter meets supply voltage VCC；The pole P of the LED light connects the collector of second PNP pipe, the pole N ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152777.4A CN109152146A (en) | 2018-09-29 | 2018-09-29 | LED illumination driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152777.4A CN109152146A (en) | 2018-09-29 | 2018-09-29 | LED illumination driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109152146A true CN109152146A (en) | 2019-01-04 |
Family
ID=64813769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811152777.4A Pending CN109152146A (en) | 2018-09-29 | 2018-09-29 | LED illumination driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109152146A (en) |
-
2018
- 2018-09-29 CN CN201811152777.4A patent/CN109152146A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |
|
| WD01 | Invention patent application deemed withdrawn after publication |