CN109195260A - A kind of LED drive circuit - Google Patents
A kind of LED drive circuit Download PDFInfo
- Publication number
- CN109195260A CN109195260A CN201811164628.XA CN201811164628A CN109195260A CN 109195260 A CN109195260 A CN 109195260A CN 201811164628 A CN201811164628 A CN 201811164628A CN 109195260 A CN109195260 A CN 109195260A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- grid
- drain electrode
- pmos tube
- nmos tube
- 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.)
- Withdrawn
Links
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of LED drive circuits.A kind of LED drive circuit includes first capacitor, the second capacitor, the first NMOS tube, the first PMOS tube, first resistor and LED light.Using LED drive circuit provided by the invention, circuit structure is simple, and required component number is few, while being effectively protected unlatching circuit on startup.
Description
Technical field
The present invention relates to electronic technology field more particularly to LED drive circuits.
Background technique
Existing LED drive circuit structure is complicated, at high cost, in order to reduce cost, simplifies circuit structure, required component
Number is few, while being effectively protected unlatching circuit on startup.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, provide a kind of LED drive circuit.
A kind of LED drive circuit, including first capacitor, the second capacitor, the first NMOS tube, the first PMOS tube, first resistor
And LED light:
The grid of one termination supply voltage VCC and first NMOS tube of the first capacitor, other end ground connection；Described second
One termination supply voltage VCC of capacitor, the drain electrode of another termination first NMOS tube and the grid of first PMOS tube；Institute
The grid for stating the first NMOS tube connects one end of supply voltage VCC and the first capacitor, and drain electrode connects one end of second capacitor
With the grid of first PMOS tube, source electrode ground connection；The grid of first PMOS tube meets one end and the institute of second capacitor
The drain electrode of the first NMOS tube is stated, drain electrode connects one end of the first resistor, and source electrode meets supply voltage VCC；The first resistor
The drain electrode of one termination first PMOS tube, the pole P of another termination LED light；The pole P of the LED light connects first electricity
One end of resistance, the pole N ground connection.
After powering on, the first capacitor charges and the grid of first NMOS tube is prevented to be damaged, the first NMOS
The grid of pipe meets supply voltage VCC and is connected, and drain electrode drags down, i.e., the grid of described first PMOS tube passes through first NMOS tube
Source-drain electrode ground connection and make first PMOS tube lead to alive and drive the LED light from drain electrode outflow；First electricity
Metering function is played in resistance；Second capacitor plays the role of protecting the grid of first PMOS tube.
Detailed description of the invention
Fig. 1 is the circuit diagram of LED drive circuit of the invention.
Specific embodiment
The content of present invention is further illustrated below in conjunction with attached drawing.
A kind of LED drive circuit, as shown in Figure 1, include first capacitor 101, the second capacitor 102, the first NMOS tube 103,
First PMOS tube 104, first resistor 105 and LED light 106:
The grid of one termination supply voltage VCC and first NMOS tube 103 of the first capacitor 101, other end ground connection；Institute
State a termination supply voltage VCC of the second capacitor 102, the drain electrode and described first of another termination first NMOS tube 103
The grid of PMOS tube 104；The grid of first NMOS tube 103 connects one end of supply voltage VCC and the first capacitor 101,
Drain electrode connects one end of second capacitor 102 and the grid of first PMOS tube 104, source electrode ground connection；First PMOS tube
104 grid connects one end of second capacitor 102 and the drain electrode of first NMOS tube 103, and drain electrode connects the first resistor
105 one end, source electrode meet supply voltage VCC；The drain electrode of one termination first PMOS tube 104 of the first resistor 105, separately
The pole P of the one termination LED light 106；The pole P of the LED light 106 connects one end of the first resistor 105, the pole N ground connection.
After powering on, the first capacitor 101, which charges, simultaneously prevents the grid of first NMOS tube 103 to be damaged, and described the
The grid of one NMOS tube 103 meets supply voltage VCC and is connected, and drain electrode drags down, i.e., the grid of described first PMOS tube 104 passes through institute
It states the source-drain electrode ground connection of the first NMOS tube 103 and first PMOS tube 104 is led and is alived from drain electrode outflow driving institute
State LED light 106；The first resistor 105 plays metering function；Second capacitor 102 plays protection first PMOS tube
104 grid effect.
Claims (1)
1. a kind of LED drive circuit, it is characterised in that: including first capacitor, the second capacitor, the first NMOS tube, the first PMOS tube,
First resistor and LED light；The grid of one termination supply voltage VCC and first NMOS tube of the first capacitor, the other end
Ground connection；One termination supply voltage VCC of second capacitor, the drain electrode and described first of another termination first NMOS tube
The grid of PMOS tube；The grid of first NMOS tube connects one end of supply voltage VCC and the first capacitor, and drain electrode connects described
The grid of one end of the second capacitor and first PMOS tube, source electrode ground connection；The grid of first PMOS tube connects described second
The drain electrode of one end of capacitor and first NMOS tube, drain electrode connect one end of the first resistor, and source electrode meets supply voltage VCC；
The drain electrode of one termination first PMOS tube of the first resistor, the pole P of another termination LED light；The P of the LED light
Pole connects one end of the first resistor, the pole N ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164628.XA CN109195260A (en) | 2018-10-06 | 2018-10-06 | A kind of LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164628.XA CN109195260A (en) | 2018-10-06 | 2018-10-06 | A kind of LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109195260A true CN109195260A (en) | 2019-01-11 |
Family
ID=64947058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811164628.XA Withdrawn CN109195260A (en) | 2018-10-06 | 2018-10-06 | A kind of LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109195260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114599132A (en) * | 2022-05-09 | 2022-06-07 | 中国工程物理研究院流体物理研究所 | Imaging illumination light source driving pulse generation device and photographic illumination device |
-
2018
- 2018-10-06 CN CN201811164628.XA patent/CN109195260A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114599132A (en) * | 2022-05-09 | 2022-06-07 | 中国工程物理研究院流体物理研究所 | Imaging illumination light source driving pulse generation device and photographic illumination device |
| CN114599132B (en) * | 2022-05-09 | 2022-07-29 | 中国工程物理研究院流体物理研究所 | Imaging illumination light source driving pulse generation device and photographic illumination device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190111 |