CN204994034U - LED drive circuit with high power supply rejection ratio - Google Patents
LED drive circuit with high power supply rejection ratio Download PDFInfo
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- CN204994034U CN204994034U CN201520801787.1U CN201520801787U CN204994034U CN 204994034 U CN204994034 U CN 204994034U CN 201520801787 U CN201520801787 U CN 201520801787U CN 204994034 U CN204994034 U CN 204994034U
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- pipe
- base stage
- resistance
- collector electrode
- pnp
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Abstract
The utility model discloses a LED drive circuit with high power supply rejection ratio. LED drive circuit with high power supply rejection ratio includes first resistance, a NPN pipe, the 2nd NPN pipe, second resistance, the 3rd NPN pipe, a PNP pipe, the 2nd PNP pipe, third resistance, fourth resistance, fourth NPN pipe, the 5th resistance, the 5th NPN pipe, the 6th resistance, the 3rd PNP pipe, fourth PNP pipe, the 6th NPN pipe, the 5th PNP pipe, the 6th PNP pipe, the 7th resistance and LED lamp.
Description
Technical field
The utility model relates to LED drive circuit, refers more particularly to the LED drive circuit with high PSRR.
Background technology
In order to reduce the impact of supply voltage on LED drive current, devise the LED drive circuit with high PSRR.
Summary of the invention
The utility model aims to provide a kind of LED drive circuit with high PSRR.
There is the LED drive circuit of high PSRR, comprise the first resistance, a NPN pipe, the 2nd NPN pipe, the second resistance, the 3rd NPN pipe, the first PNP pipe, the second PNP pipe, the 3rd resistance, the 4th resistance, the 4th NPN pipe, the 5th resistance, the 5th NPN pipe, the 6th resistance, the 3rd PNP pipe, the 4th PNP pipe, the 6th NPN pipe, the 5th PNP pipe, the 6th PNP pipe, the 7th resistance and LED:
One termination supply voltage VCC of described first resistance, the base stage of the base stage of a NPN pipe described in another termination and collector electrode and described 3rd NPN pipe;
The base stage of a described NPN pipe and collector electrode are connected together the base stage of one end of connecing described first resistance again and described 3rd NPN pipe, and emitter connects base stage and the collector electrode of described 2nd NPN pipe;
The base stage of described 2nd NPN pipe and collector electrode are connected together and connect the emitter of a described NPN pipe again, grounded emitter;
One termination supply voltage VCC of described second resistance, the collector electrode of the 3rd NPN pipe described in another termination;
The base stage of described 3rd NPN pipe connects one end of the first resistance and the base stage of a described NPN pipe and collector electrode, and collector electrode connects one end of described second resistance, and emitter connects one end of described 3rd resistance and the collector electrode of described second PNP pipe;
The base stage of described first PNP pipe and collector electrode are connected together the emitter and the base stage of described 3rd PNP pipe and the base stage of described 5th PNP pipe that connect described second PNP pipe again, and emitter meets supply voltage VCC;
The base stage of described first PNP pipe connects the base stage of the base stage of described 4th PNP pipe and the collector electrode of collector electrode and described 6th NPN pipe and described 6th PNP pipe, collector electrode connects the emitter of described 3rd NPN pipe and one end of described 3rd resistance, and emitter connects the base stage of the base stage of described first PNP pipe and the base stage of collector electrode and described 3rd PNP pipe and described 5th PNP pipe;
The emitter of the 3rd NPN pipe described in one termination of described 3rd resistance and the collector electrode of described second PNP pipe, one end of the 4th resistance described in another termination and one end of described 5th resistance;
One end of 3rd resistance described in one termination of described 4th resistance and one end of described 5th resistance, the base stage of the base stage of the 4th NPN pipe described in another termination and collector electrode and described 5th NPN pipe;
The base stage of described 4th NPN pipe and collector electrode are connected together and connect one end of described 4th resistance and the base stage of described two or five NPN pipe again, grounded emitter;
One end of 3rd resistance described in one termination of described 5th resistance and one end of described 4th resistance, the collector electrode of the 5th NPN pipe described in another termination and the base stage of described 6th NPN pipe;
The base stage of described 5th NPN pipe connects one end of described 4th resistance and the base stage of described 4th NPN pipe and collector electrode, and collector electrode connects one end of described 5th resistance and the base stage of described 6th NPN pipe, and emitter connects one end of described 6th resistance;
The emitter of the 5th NPN pipe described in one termination of described 6th resistance, other end ground connection;
The base stage of described 3rd PNP pipe connects the base stage of the emitter of described second PNP pipe and the base stage of described first PMOS and collector electrode and described 5th PNP pipe, and collector electrode connects the emitter of described 4th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 4th PNP pipe and collector electrode are connected together the base stage and the collector electrode of described 6th NPN pipe and the base stage of described 6th PNP pipe that connect described second PNP pipe again, and emitter connects the collector electrode of described 3rd PNP pipe;
The base stage of described 6th NPN pipe connects one end of described 5th resistance and the collector electrode of described 5th NPN pipe, and collector electrode connects the base stage of the base stage of described second PNP pipe and the base stage of described 4th PNP pipe and collector electrode and described 6th PNP pipe, grounded emitter;
The base stage of described 5th PNP pipe connects the base stage of the emitter of described second PNP pipe and the base stage of described first PNP pipe and collector electrode and described 3rd PNP pipe, and collector electrode connects the emitter of described 6th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 6th PNP pipe connects the collector electrode of the base stage of described second PNP pipe and the base stage of described 4th PNP pipe and collector electrode and described 6th NPN pipe, and collector electrode connects one end of described 7th resistance, and emitter connects the collector electrode of described 5th PNP pipe;
The collector electrode of the 6th PNP pipe described in one termination of described 7th resistance, the P pole of LED described in another termination;
The P pole of described LED connects one end of described 7th resistance, N pole ground connection.
Described first resistance, a described NPN pipe, described 2nd NPN pipe, described second resistance and described 3rd NPN pipe form start-up circuit, form electric current from supply voltage VCC successively the first resistance, a described NPN pipe, described 2nd NPN pipe, then give described 3rd NPN pipe by a described NPN pipe mirror image; The core of described 4th resistance, described 4th NPN pipe, described 5th resistance, described 5th NPN pipe, described 6th resistance formation LED drive circuit; After start-up circuit provides starting current, after drive circuit normally works, because the emitter voltage of described 3rd NPN pipe raises, the emitter of described 3rd NPN pipe would not have outflow of bus current, described 6th NPN pipe and described 4th PNP pipe form the operating current feeding back to drive circuit core after drive circuit normally works, and give described second PNP pipe by described 4th PNP pipe mirror image; Described first PNP pipe and described 3rd PNP pipe are to reduce supply voltage VCC respectively on the impact of described second PNP pipe and described 4th PNP pipe, that is to say the Power Supply Rejection Ratio that improve LED drive current.
Accompanying drawing explanation
Fig. 1 is the circuit diagram with the LED drive circuit of high PSRR of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
There is the LED drive circuit of high PSRR, as shown in Figure 1, the first resistance 101, a NPN pipe 102, the 2nd NPN pipe 103, second resistance 104, the 3rd NPN pipe 105, first PNP pipe 106, second PNP pipe 107, the 3rd resistance 108, the 4th resistance 109, the 4th NPN pipe 110, the 5th resistance 111, the 5th NPN pipe 112, the 6th resistance 113, the 3rd PNP pipe 114, the 4th PNP pipe 115, the 6th NPN pipe 116, the 5th PNP pipe 117, the 6th PNP pipe 118, the 7th resistance 119 and LED 120 is comprised:
One termination supply voltage VCC of described first resistance 101, the base stage of the base stage of a NPN pipe 102 described in another termination and collector electrode and described 3rd NPN pipe 105;
The base stage of a described NPN pipe 102 and collector electrode are connected together the base stage of one end of connecing described first resistance 101 again and described 3rd NPN pipe 105, and emitter connects base stage and the collector electrode of described 2nd NPN pipe 103;
The base stage of described 2nd NPN pipe 103 and collector electrode are connected together and connect the emitter of a described NPN pipe 102 again, grounded emitter;
One termination supply voltage VCC of described second resistance 104, the collector electrode of the 3rd NPN pipe 105 described in another termination;
The base stage of described 3rd NPN pipe 105 connects one end of the first resistance 101 and the base stage of a described NPN pipe 102 and collector electrode, collector electrode connects one end of described second resistance 104, and emitter connects one end of described 3rd resistance 108 and the collector electrode of described second PNP pipe 107;
The base stage of described first PNP pipe 106 and collector electrode are connected together the emitter and the base stage of described 3rd PNP pipe 114 and the base stage of described 5th PNP pipe 117 that connect described second PNP pipe 107 again, and emitter meets supply voltage VCC;
The base stage of described first PNP pipe 107 connects the base stage of the base stage of described 4th PNP pipe 115 and the collector electrode of collector electrode and described 6th NPN pipe 116 and described 6th PNP pipe 118, collector electrode connects the emitter of described 3rd NPN pipe 105 and one end of described 3rd resistance 108, and emitter connects the base stage of the base stage of described first PNP pipe 106 and the base stage of collector electrode and described 3rd PNP pipe 114 and described 5th PNP pipe 117;
The emitter of the 3rd NPN pipe 105 described in one termination of described 3rd resistance 108 and the collector electrode of described second PNP pipe 107, one end of the 4th resistance 109 described in another termination and one end of described 5th resistance 111;
One end of 3rd resistance 108 described in one termination of described 4th resistance 109 and one end of described 5th resistance 111, the base stage of the base stage of the 4th NPN pipe 110 described in another termination and collector electrode and described 5th NPN pipe 112;
The base stage of described 4th NPN pipe 110 and collector electrode are connected together the base stage of one end of connecing described 4th resistance 109 again and described 5th NPN pipe 112, grounded emitter;
One end of 3rd resistance 108 described in one termination of described 5th resistance 111 and one end of described 4th resistance 109, the collector electrode of the 5th NPN pipe 112 described in another termination and the base stage of described 6th NPN pipe 116;
The base stage of described 5th NPN pipe 112 connects one end of described 4th resistance 109 and the base stage of described 4th NPN pipe 110 and collector electrode, collector electrode connects one end of described 5th resistance 111 and the base stage of described 6th NPN pipe 116, and emitter connects one end of described 6th resistance 113;
The emitter of the 5th NPN pipe 112 described in one termination of described 6th resistance 113, other end ground connection;
The base stage of described 3rd PNP pipe 114 connects the base stage of the emitter of described second PNP pipe 107 and the base stage of described first PMOS 106 and collector electrode and described 5th PNP pipe 117, collector electrode connects the emitter of described 4th PNP pipe 115, and emitter meets supply voltage VCC;
The base stage of described 4th PNP pipe 115 and collector electrode are connected together the base stage and the collector electrode of described 6th NPN pipe 116 and the base stage of described 6th PNP pipe 118 that connect described second PNP pipe 107 again, and emitter connects the collector electrode of described 3rd PNP pipe 114;
The base stage of described 6th NPN pipe 116 connects one end of described 5th resistance 111 and the collector electrode of described 5th NPN pipe 112, collector electrode connects the base stage of the base stage of described second PNP pipe 107 and the base stage of described 4th PNP pipe 115 and collector electrode and described 6th PNP pipe 118, grounded emitter;
The base stage of described 5th PNP pipe 117 connects the base stage of the emitter of described second PNP pipe 107 and the base stage of described first PNP pipe 106 and collector electrode and described 3rd PNP pipe 114, and collector electrode connects the emitter of described 6th PNP pipe 118, and emitter meets supply voltage VCC;
The base stage of described 6th PNP pipe 118 connects the collector electrode of the base stage of described second PNP pipe 107 and the base stage of described 4th PNP pipe 115 and collector electrode and described 6th NPN pipe 116, collector electrode connects one end of described 7th resistance 119, and emitter connects the collector electrode of described 5th PNP pipe 117;
The collector electrode of the 6th PNP pipe 118 described in one termination of described 7th resistance 119, the P pole of LED 120 described in another termination;
The P pole of described LED 120 connects one end of described 7th resistance 119, N pole ground connection.
Described first resistance 101, a described NPN pipe 102, described 2nd NPN pipe 103, described second resistance 104 and described 3rd NPN pipe 105 form start-up circuit, form electric current from supply voltage VCC successively the first resistance 101, a described NPN pipe 102, described 2nd NPN pipe 103, then give described 3rd NPN pipe 105 by described NPN pipe 102 mirror image; Described 4th resistance 109, described 4th NPN pipe 110, described 5th resistance 111, described 5th NPN pipe 112, described 6th resistance 113 form the core of LED drive circuit; After start-up circuit provides starting current, after drive circuit normally works, because the emitter voltage of described 3rd NPN pipe 105 raises, the emitter of described 3rd NPN pipe 105 would not have outflow of bus current, described 6th NPN pipe 116 and described 4th PNP pipe 115 form the operating current feeding back to drive circuit core after drive circuit normally works, and give described second PNP pipe 107 by described 4th PNP pipe 115 mirror image; Described first PNP pipe 106 and described 3rd PNP pipe 114 are to reduce supply voltage VCC respectively on the impact of described second PNP pipe 107 and described 4th PNP pipe 115, that is to say the Power Supply Rejection Ratio that improve LED drive current.
Claims (1)
1. there is the LED drive circuit of high PSRR, it is characterized in that: comprise the first resistance, a NPN pipe, the 2nd NPN pipe, the second resistance, the 3rd NPN pipe, the first PNP pipe, the second PNP pipe, the 3rd resistance, the 4th resistance, the 4th NPN pipe, the 5th resistance, the 5th NPN pipe, the 6th resistance, the 3rd PNP pipe, the 4th PNP pipe, the 6th NPN pipe, the 5th PNP pipe, the 6th PNP pipe, the 7th resistance and LED;
One termination supply voltage VCC of described first resistance, the base stage of the base stage of a NPN pipe described in another termination and collector electrode and described 3rd NPN pipe;
The base stage of a described NPN pipe and collector electrode are connected together the base stage of one end of connecing described first resistance again and described 3rd NPN pipe, and emitter connects base stage and the collector electrode of described 2nd NPN pipe;
The base stage of described 2nd NPN pipe and collector electrode are connected together and connect the emitter of a described NPN pipe again, grounded emitter;
One termination supply voltage VCC of described second resistance, the collector electrode of the 3rd NPN pipe described in another termination;
The base stage of described 3rd NPN pipe connects one end of the first resistance and the base stage of a described NPN pipe and collector electrode, and collector electrode connects one end of described second resistance, and emitter connects one end of described 3rd resistance and the collector electrode of described second PNP pipe;
The base stage of described first PNP pipe and collector electrode are connected together the emitter and the base stage of described 3rd PNP pipe and the base stage of described 5th PNP pipe that connect described second PNP pipe again, and emitter meets supply voltage VCC;
The base stage of described first PNP pipe connects the base stage of the base stage of described 4th PNP pipe and the collector electrode of collector electrode and described 6th NPN pipe and described 6th PNP pipe, collector electrode connects the emitter of described 3rd NPN pipe and one end of described 3rd resistance, and emitter connects the base stage of the base stage of described first PNP pipe and the base stage of collector electrode and described 3rd PNP pipe and described 5th PNP pipe;
The emitter of the 3rd NPN pipe described in one termination of described 3rd resistance and the collector electrode of described second PNP pipe, one end of the 4th resistance described in another termination and one end of described 5th resistance;
One end of 3rd resistance described in one termination of described 4th resistance and one end of described 5th resistance, the base stage of the base stage of the 4th NPN pipe described in another termination and collector electrode and described 5th NPN pipe;
The base stage of described 4th NPN pipe and collector electrode are connected together the base stage of one end of connecing described 4th resistance again and described 5th NPN pipe, grounded emitter;
One end of 3rd resistance described in one termination of described 5th resistance and one end of described 4th resistance, the collector electrode of the 5th NPN pipe described in another termination and the base stage of described 6th NPN pipe;
The base stage of described 5th NPN pipe connects one end of described 4th resistance and the base stage of described 4th NPN pipe and collector electrode, and collector electrode connects one end of described 5th resistance and the base stage of described 6th NPN pipe, and emitter connects one end of described 6th resistance;
The emitter of the 5th NPN pipe described in one termination of described 6th resistance, other end ground connection;
The base stage of described 3rd PNP pipe connects the base stage of the emitter of described second PNP pipe and the base stage of described first PMOS and collector electrode and described 5th PNP pipe, and collector electrode connects the emitter of described 4th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 4th PNP pipe and collector electrode are connected together the base stage and the collector electrode of described 6th NPN pipe and the base stage of described 6th PNP pipe that connect described second PNP pipe again, and emitter connects the collector electrode of described 3rd PNP pipe;
The base stage of described 6th NPN pipe connects one end of described 5th resistance and the collector electrode of described 5th NPN pipe, and collector electrode connects the base stage of the base stage of described second PNP pipe and the base stage of described 4th PNP pipe and collector electrode and described 6th PNP pipe, grounded emitter;
The base stage of described 5th PNP pipe connects the base stage of the emitter of described second PNP pipe and the base stage of described first PNP pipe and collector electrode and described 3rd PNP pipe, and collector electrode connects the emitter of described 6th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 6th PNP pipe connects the collector electrode of the base stage of described second PNP pipe and the base stage of described 4th PNP pipe and collector electrode and described 6th NPN pipe, and collector electrode connects one end of described 7th resistance, and emitter connects the collector electrode of described 5th PNP pipe;
The collector electrode of the 6th PNP pipe described in one termination of described 7th resistance, the P pole of LED described in another termination;
The P pole of described LED connects one end of described 7th resistance, N pole ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520801787.1U CN204994034U (en) | 2015-10-15 | 2015-10-15 | LED drive circuit with high power supply rejection ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520801787.1U CN204994034U (en) | 2015-10-15 | 2015-10-15 | LED drive circuit with high power supply rejection ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204994034U true CN204994034U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520801787.1U Expired - Fee Related CN204994034U (en) | 2015-10-15 | 2015-10-15 | LED drive circuit with high power supply rejection ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204994034U (en) |
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2015
- 2015-10-15 CN CN201520801787.1U patent/CN204994034U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20161015 |