CN204465922U - Led control system device - Google Patents
Led control system device Download PDFInfo
- Publication number
- CN204465922U CN204465922U CN201420724102.3U CN201420724102U CN204465922U CN 204465922 U CN204465922 U CN 204465922U CN 201420724102 U CN201420724102 U CN 201420724102U CN 204465922 U CN204465922 U CN 204465922U
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- China
- Prior art keywords
- pole
- resistance
- diode
- electric capacity
- circuit
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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of LED control system device.LED control system device comprises rectification circuit, switch type power supply converter circuit and half-bridge driven output circuit: described rectification circuit be connected to power circuit input for receiving ac input voltage; Rectification circuit described in described switch type power supply converter circuit changes the input voltage after rectification, generates to respond the input voltage after rectification the output voltage regulated; Described half-bridge driven output circuit is that the voltage half bridge output filtering that described switch type power supply converter circuit exports is obtained direct voltage drive LED.The LED control system device utilizing the utility model to provide can the mode of real-time sampling power tube current to control LED current.
Description
Technical field
The utility model relates to switching power circuit, refers more particularly to LED control system.
Background technology
LED control system is based on switching power circuit design, and simultaneously in LED control system circuit, the monitoring of LED current is the very important part of circuit design, and electric current is crossed conference and LED is burnt out, and the too small meeting of electric current makes LED luminance inadequate.
Summary of the invention
The utility model is intended to solve the deficiencies in the prior art, provides a kind of mode of the power tube current of primary coil that driven by real-time sampling to control the LED control system device of LED current.
LED control system device, comprises rectification circuit, switch type power supply converter circuit and half-bridge driven output circuit:
Described rectification circuit be connected to power circuit input for receiving ac input voltage;
Described switch type power supply converter circuit changes the input voltage after rectification to described rectification circuit, generates to respond the input voltage after rectification the output voltage regulated;
Described half-bridge driven output circuit is that the voltage half bridge output filtering that described switch type power supply converter circuit exports is obtained direct voltage drive LED.
Described rectification circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode:
The P pole ground connection of described first diode, N pole connects one end of ac input voltage and the P pole of described second diode;
The P pole of described second diode connects one end of ac input voltage and the N pole of described first diode, and N pole connects the N pole of described 4th diode and described switch type power supply converter circuit;
The P pole ground connection of described 3rd diode, N pole connects the other end of ac input voltage and the P pole of described 4th diode;
The P pole of described 4th diode connects the other end of ac input voltage and the N pole of described 3rd diode, and N pole connects the N pole of described second diode and described switch type power supply converter circuit.
Described switch type power supply converter circuit comprises the first electric capacity, the second electric capacity, the 3rd electric capacity, the first resistance, the second resistance, the 3rd resistance, the 5th diode, transformer primary side, PWM generation circuit and power NMOS tube:
One end of the N pole of the second diode described in one termination of described first electric capacity, the N pole of described 4th diode, one end of described first resistance, described one end of 3rd electric capacity, one end of the second resistance and described transformer primary side, other end ground connection;
The power supply VCC that one end of first resistance described in one termination of described second electric capacity and described PWM produce circuit holds, other end ground connection:
One end of one end of the N pole of the second diode described in one termination of described 3rd electric capacity, the N pole of described 4th diode, described first electric capacity, one end of described first resistance, one end of the second resistance and described transformer primary side, the other end of the second resistance described in another termination and the N pole of described 5th diode;
One end of the N pole of the second diode described in one termination of described first resistance, the N pole of described 4th diode, one end of described first electric capacity, described 3rd electric capacity, one end of described second resistance and one end of described transformer primary side, the power supply VCC that one end of the second electric capacity described in another termination and described PWM produce circuit holds;
The one termination other end of described second resistance connects one end of described 3rd electric capacity and the N pole of described 5th diode;
The source electrode of power NMOS tube described in one termination of described 3rd resistance and described PWM produce the CC end of circuit, other end ground connection;
The P pole of described 5th diode connects the other end of described transformer primary side and the drain electrode of described power NMOS tube, and N pole connects one end of described 3rd electric capacity and one end of described second resistance;
The N pole of the second diode described in one termination of described transformer primary side and one end of one end of the N pole of described 4th diode and one end of described first electric capacity and described first resistance and one end of described second resistance and described 3rd electric capacity;
It is produce pwm signal to drive described power NMOS tube that described PWM produces circuit, one end of 3rd resistance and the source electrode of described power NMOS tube described in the current sample end CC termination of described PWM generation circuit, described 3rd resistance is sampling resistor, and the pulse-width signal end GT being carried out PWM generation circuit described in regulable control by the electric current of sampling in described power NMOS tube drives the grid of described power NMOS tube to reach the electric current of indirect regulation LED;
The grid of described power NMOS tube meets the pulse-width signal output GT that described PWM produces circuit, and drain electrode connects the described P pole of the 5th diode and one end of described transformer primary side, and source electrode meets the current sample end CC of described 3rd resistance and described PWM generation circuit.
Described half-bridge driven output circuit comprises transformer time limit, the 6th diode, the 4th electric capacity, a LED, the 2nd LED and the 3rd LED:
The P pole of the 6th diode described in one termination on described transformer time limit, other end ground connection;
The P pole of described 6th diode connects the one end on described transformer time limit, and N pole connects one end of the 4th electric capacity and the P pole of a described LED;
The N pole of the 6th diode described in one termination of described 4th electric capacity and the P pole of a described LED;
The P pole of a described LED connects the N pole of described 6th diode and one end of described 4th electric capacity, and N pole connects the P pole of described 2nd LED;
The P pole of described 2nd LED connects the N pole of a described LED, and N pole connects the P pole of described 3rd LED;
The P pole of described 3rd LED connects the N pole of described 2nd LED, N pole ground connection.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED control system device of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
LED control system device, as shown in Figure 1, comprises rectification circuit 100, switch type power supply converter circuit 200 and half-bridge driven output circuit 300:
Described rectification circuit 100 be connected to power circuit input for receiving ac input voltage;
Described switch type power supply converter circuit 200 changes the input voltage after rectification to described rectification circuit 100, generates to respond the input voltage after rectification the output voltage regulated;
Described half-bridge driven output circuit 300 is that the voltage half bridge output filtering that described switch type power supply converter circuit exports is obtained direct voltage drive LED.
Described rectification circuit 100 comprises the first diode 101, second diode 102, the 3rd diode 103 and the 4th diode 104:
The P pole ground connection of described first diode 101, N pole connects one end of ac input voltage and the P pole of described second diode 102;
The P pole of described second diode 102 connects one end of ac input voltage and the N pole of described first diode 101, and N pole connects the N pole of described 4th diode 104 and described switch type power supply converter circuit 200;
The P pole ground connection of described 3rd diode 103, N pole connects the other end of ac input voltage and the P pole of described 4th diode 104;
The P pole of described 4th diode 104 connects the other end of ac input voltage and the N pole of described 3rd diode 103, and N pole connects the N pole of described second diode 102 and described switch type power supply converter circuit 200.
Described switch type power supply converter circuit 200 comprises the first electric capacity 201, second electric capacity 203, the 3rd electric capacity 207, first resistance 202, second resistance 208, the 3rd resistance 210, the 5th diode 209, transformer primary side 206, PWM generation circuit 204 and power NMOS tube 205:
One end of the N pole of the second diode 102 described in one termination of described first electric capacity 201, the N pole of described 4th diode 104, one end of described first resistance 202, described 3rd electric capacity 207, one end of the second resistance 208 and one end of described transformer primary side 206, other end ground connection;
The power supply VCC that one end of first resistance 202 described in one termination of described second electric capacity 203 and described PWM produce circuit 204 holds, other end ground connection;
One end of the N pole of the second diode 102 described in one termination of described 3rd electric capacity 207, the N pole of described 4th diode 104, one end of described first electric capacity 201, described first resistance 202, one end of the second resistance 208 and one end of described transformer primary side 206, the other end of the second resistance 208 described in another termination and the N pole of described 5th diode 209;
The N pole of the second diode 102 described in one termination of described first resistance 202, the N pole of described 4th diode 104, one end of described first electric capacity 201, one end of described 3rd electric capacity 207, described one end of second resistance 208 and one end of described transformer primary side 206, the power supply VCC that one end of the second electric capacity 203 described in another termination and described PWM produce circuit 204 holds;
The one termination other end of described second resistance 208 connects one end of described 3rd electric capacity 207 and the N pole of described 5th diode 209;
The source electrode of power NMOS tube 205 described in one termination of described 3rd resistance 210 and described PWM produce the CC end of circuit 204, other end ground connection;
The P pole of described 5th diode 209 connects the other end of described transformer primary side 206 and the drain electrode of described power NMOS tube 205, and N pole connects one end of described 3rd electric capacity 207 and one end of described second resistance 208;
One end of one end of the N pole of the second diode 102 described in one termination of described transformer primary side 206 and the N pole of described 4th diode 104 and described first electric capacity 201 and one end of described first resistance 202 and described second resistance 208 and one end of described 3rd electric capacity 207;
It is produce pwm signal to drive described power NMOS tube 205 that described PWM produces circuit 204, one end of 3rd resistance 210 and the source electrode of described power NMOS tube 205 described in the current sample end CC termination of described PWM generation circuit 204, described 3rd resistance 210 is sampling resistor, and the pulse-width signal end GT being carried out PWM generation circuit 204 described in regulable control by the electric current of sampling in described power NMOS tube 205 drives the grid of described power NMOS tube 205 to reach the electric current of indirect regulation LED;
The grid of described power NMOS tube 205 meets the pulse-width signal output GT that described PWM produces circuit 204, drain electrode connects the described P pole of the 5th diode 209 and one end of described transformer primary side 206, and source electrode meets the current sample end CC of described 3rd resistance 210 and described PWM generation circuit 204.
Described half-bridge driven output circuit 300 comprises transformer time limit 301, the 6th diode 302, the 4th electric capacity 303, a LED304, the 2nd LED305 and the 3rd LED306:
The P pole of the 6th diode 302 described in one termination on described transformer time limit 301, other end ground connection;
The P pole of described 6th diode 302 connects the one end on described transformer time limit 301, and N pole connects one end of the 4th electric capacity 303 and the P pole of a described LED304;
The N pole of the 6th diode 302 described in one termination of described 4th electric capacity 303 and the P pole of a described LED304;
The P pole of a described LED304 connects the N pole of described 6th diode 302 and one end of described 4th electric capacity 303, and N pole connects the P pole of described 2nd LED305;
The P pole of described 2nd LED305 connects the N pole of a described LED304, and N pole connects the P pole of described 3rd LED306;
The P pole of described 3rd LED306 connects the N pole of described LED305, N pole ground connection.
Claims (1)
1.LED control system device, comprise rectification circuit, switch type power supply converter circuit and half-bridge driven output circuit, it is characterized in that described switch type power supply converter circuit comprises the first electric capacity, the second electric capacity, the 3rd electric capacity, the first resistance, the second resistance, the 3rd resistance, the 5th diode, transformer primary side, PWM generation circuit and power NMOS tube:
One end of the N pole of one termination second diode of described first electric capacity, the N pole of the 4th diode, one end of described first resistance, described one end of 3rd electric capacity, one end of the second resistance and described transformer primary side, other end ground connection;
The power supply VCC that one end of first resistance described in one termination of described second electric capacity and described PWM produce circuit holds, other end ground connection;
One end of one end of the N pole of one termination second diode of described 3rd electric capacity, the N pole of the 4th diode, described first electric capacity, one end of described first resistance, one end of the second resistance and described transformer primary side, the other end of the second resistance described in another termination and the N pole of described 5th diode;
One end of the N pole of one termination second diode of described first resistance, the N pole of the 4th diode, one end of described first electric capacity, described 3rd electric capacity, one end of described second resistance and one end of described transformer primary side, the power supply VCC that one end of the second electric capacity described in another termination and described PWM produce circuit holds;
The one termination other end of described second resistance connects one end of described 3rd electric capacity and the N pole of described 5th diode;
The source electrode of power NMOS tube described in one termination of described 3rd resistance and described PWM produce the CC end of circuit, other end ground connection;
The P pole of described 5th diode connects the other end of described transformer primary side and the drain electrode of described power NMOS tube, and N pole connects one end of described 3rd electric capacity and one end of described second resistance;
One end of the N pole of one termination second diode of described transformer primary side and one end of one end of the N pole of the 4th diode and described first electric capacity and one end of described first resistance and described second resistance and described 3rd electric capacity;
It is produce pwm signal to drive described power NMOS tube that described PWM produces circuit, one end of 3rd resistance and the source electrode of described power NMOS tube described in the current sample end CC termination of described PWM generation circuit, described 3rd resistance is sampling resistor, and the pulse-width signal end GT being carried out PWM generation circuit described in regulable control by the electric current of sampling in described power NMOS tube drives the grid of described power NMOS tube to reach the electric current of indirect regulation LED;
The grid of described power NMOS tube meets the pulse-width signal output GT that described PWM produces circuit, and drain electrode connects the described P pole of the 5th diode and one end of described transformer primary side, and source electrode meets the current sample end CC of described 3rd resistance and described PWM generation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420724102.3U CN204465922U (en) | 2014-11-27 | 2014-11-27 | Led control system device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420724102.3U CN204465922U (en) | 2014-11-27 | 2014-11-27 | Led control system device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465922U true CN204465922U (en) | 2015-07-08 |
Family
ID=53672739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420724102.3U Expired - Fee Related CN204465922U (en) | 2014-11-27 | 2014-11-27 | Led control system device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204465922U (en) |
-
2014
- 2014-11-27 CN CN201420724102.3U patent/CN204465922U/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: 20150708 Termination date: 20151127 |