CN211656468U - High-power low-noise intelligent adjustable LED drive circuit and device - Google Patents
High-power low-noise intelligent adjustable LED drive circuit and device Download PDFInfo
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- CN211656468U CN211656468U CN202020108033.9U CN202020108033U CN211656468U CN 211656468 U CN211656468 U CN 211656468U CN 202020108033 U CN202020108033 U CN 202020108033U CN 211656468 U CN211656468 U CN 211656468U
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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
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- 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]
Abstract
The utility model discloses an adjustable LED drive circuit of intelligence and device of high-power low noise, the adjustable LED drive circuit of intelligence of high-power low noise includes: the device comprises an upper computer, a main control module, an external dimming module, a noise reduction module, an over-temperature protection module, a communication module and a switching power supply module; the communication module is electrically connected with the upper computer and the main control module, the main control module is electrically connected with the external dimming module, and the external dimming module, the switching power supply module and the over-temperature protection module are electrically connected with the noise reduction module; the over-temperature protection module is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer and the main control module are used for inputting pulse dimming signals of digital quantity; the communication module is used for realizing communication connection between the upper computer and the main control module; the external dimming module is used for inputting adjustable voltage to adjust the brightness of the LED, and the noise reduction module converts the switching characteristic of the output current into linear output to reduce the switching noise. The utility model discloses there is the noise low and the reliable advantage of output.
Description
Technical Field
The utility model relates to a LED drive control technical field especially relates to an intelligent adjustable LED drive circuit of high-power low noise.
Background
With the rapid development of computer technology and integrated circuit technology, the application of large-scale LED display screen driving technology is also increasingly widespread. Most of large-power large-scale LED display screen driving circuits have the problems of inconvenient dimming and large noise caused by the switching characteristics. Therefore, the invention provides a high-power low-noise intelligent adjustable LED driving circuit with convenient dimming, which is a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be, provide an adjust luminance adjustable LED drive circuit of convenient high-power low noise's intelligence and device.
On one hand, the utility model discloses a high-power low-noise intelligent adjustable LED drive circuit, which comprises an upper computer, a main control module, an external dimming module, a noise reduction module, an over-temperature protection module, a communication module and a switch power supply module; the upper computer is electrically connected with the communication module, the communication module is electrically connected with the main control module, the main control module is electrically connected with the external dimming module, and the external dimming module, the switching power supply module and the over-temperature protection module are respectively and electrically connected with the noise reduction module; the switching power supply module is used for controlling the on-off of the system; the over-temperature protection module is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer and the main control module are used for inputting pulse dimming signals of digital quantity; the communication module is used for realizing communication connection between the upper computer and the main control module; the external dimming module is used for inputting adjustable voltage to adjust the brightness of the LED, and the noise reduction module converts the switching characteristic of the output current into linear output to reduce the switching noise.
Preferably, the noise reduction module comprises a driving unit, a first RCD absorption unit, a second RCD absorption unit and a negative feedback adjustment unit; the first RCD absorption unit is respectively electrically connected with the switching power supply module, the driving unit and the first end of the LED, the second RCD absorption unit is respectively electrically connected with the switching power supply module, the driving unit and the negative feedback regulation unit, and the negative feedback regulation unit is electrically connected with the second end of the LED.
Preferably, the high-power low-noise intelligent adjustable LED driving circuit further comprises a display module; the display module is used for displaying the voltage value of the adjustable voltage.
Preferably, the first RCD absorption unit includes a first field effect transistor, a first diode, a first capacitor, a first resistor, and a second resistor; the drain electrode of the first field effect, the first end of the first diode and the first end of the first resistor are respectively electrically connected with an input power supply, the second end of the first diode and the second end of the first resistor are electrically connected with the first end of the first capacitor, the second end of the first capacitor is electrically connected with the source electrode of the first field effect transistor, the grid electrode of the first field effect transistor is electrically connected with the first end of the second resistor, and the second end of the second resistor is electrically connected with the driving unit.
Preferably, the negative feedback adjusting unit comprises a first operational amplifier, a first triode, a second capacitor, a third resistor and a fourth resistor; the non-inverting input end of the first operational amplifier is used for inputting reference voltage, the inverting input end of the first operational amplifier is electrically connected with the first end of the third resistor and the first end of the LED, the output end of the first operational amplifier is electrically connected with the base electrode of the first triode, the emitter electrode of the first triode is electrically connected with the driving unit, the first end of the second capacitor and the second end of the LED, the second end of the second capacitor is electrically connected with the inverting input end of the first operational amplifier, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the driving unit, and the second end of the fourth resistor is grounded.
Preferably, the second RCD absorbent unit is identical in structure to the first RCD absorbent unit.
Preferably, the over-temperature protection module comprises a temperature-sensitive resistor; the temperature-sensitive resistor is connected with the second resistor in parallel.
On the other hand, the utility model discloses a device, including the first aspect the intelligent adjustable LED drive circuit of high-power low noise.
The utility model discloses an adjustable LED drive circuit of intelligence of high-power low noise has following beneficial effect, the utility model discloses an adjustable LED drive circuit of intelligence of high-power low noise includes: the device comprises an upper computer, a main control module, an external dimming module, a noise reduction module, an over-temperature protection module, a communication module and a switching power supply module; the upper computer is electrically connected with the communication module, the communication module is electrically connected with the main control module, the main control module is electrically connected with the external dimming module, and the external dimming module, the switching power supply module and the over-temperature protection module are respectively and electrically connected with the noise reduction module; the over-temperature protection module is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer and the main control module are used for inputting pulse dimming signals of digital quantity; the communication module is used for realizing communication connection between the upper computer and the main control module; the external dimming module is used for inputting adjustable voltage to adjust the brightness of the LED, and the noise reduction module converts the switching characteristic of the output current into linear output to reduce the switching noise. The utility model discloses there is the noise low and the reliable advantage of output.
Drawings
Fig. 1 is a schematic block diagram of a high-power low-noise intelligent adjustable LED driving circuit according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of a noise reduction module of a high-power low-noise intelligent adjustable LED driving circuit according to a preferred embodiment of the present invention;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.
Example one
Referring to fig. 1, the utility model discloses a high-power low-noise intelligent adjustable LED driving circuit, which comprises an upper computer 1, a main control module 2, an external dimming module 3, a noise reduction module 4, an over-temperature protection module 5, a communication module 6 and a switching power supply module 7; the upper computer 1 is electrically connected with the communication module 6, the communication module 6 is electrically connected with the main control module 2, the main control module 2 is electrically connected with the external dimming module 3, and the external dimming module 3, the switching power supply module 7 and the over-temperature protection module 5 are respectively electrically connected with the noise reduction module 4; the switching power supply module 7 is used for controlling the on-off of the system; the over-temperature protection module 5 is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer 1 and the main control module 2 are used for inputting pulse dimming signals of digital quantity; the communication module 6 is used for realizing communication connection between the upper computer and the main control module 2; the external dimming module 3 is used for inputting an adjustable voltage to adjust the brightness of the LED, and the noise reduction module 4 converts the switching characteristic of the output current into a linear output to reduce the switching noise. The utility model discloses there is the noise low and the reliable advantage of output.
Preferably, referring to fig. 2, the noise reduction module 4 includes a driving unit 41, a first RCD absorption unit 42, a second RCD absorption unit 43, and a negative feedback adjustment unit 44; the first RCD absorption unit 42 is electrically connected to the switching power supply module 7, the driving unit 41, and the first end of the LED, the second RCD absorption unit 43 is electrically connected to the switching power supply module 7, the driving unit, and the negative feedback adjustment unit 44 is electrically connected to the second end of the LED.
Preferably, the high-power low-noise intelligent adjustable LED driving circuit further includes a display module 8; the display module 8 is configured to display a voltage value of the adjustable voltage.
Preferably, the first RCD absorption unit 42 includes a first field effect transistor Q1, a first diode D1, a first capacitor C1, a first resistor R8, and a second resistor R5; the drain of the first field effect Q1, the first end of the first diode D1 and the first end of the first resistor R8 are electrically connected to an input power source, the second end of the first diode D1 and the second end of the first resistor R8 are electrically connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is electrically connected to the source of the first field effect transistor Q1, the gate of the first field effect transistor Q1 is electrically connected to the first end of the second resistor R5, and the second end of the second resistor R5 is electrically connected to the driving unit 41. It can be understood that, first RCD absorption unit 42 has effectively prevented switching power supply module is opening and is turning off in-process excessive pressure and the phenomenon of overflowing, thereby the utility model discloses stability is high.
Preferably, the negative feedback adjusting unit 44 includes a first operational amplifier U2, a first transistor Q3, a second capacitor C2, a third resistor RC1, and a fourth resistor RC 2; the non-inverting input terminal of the first operational amplifier U2 is configured to input a reference voltage, the inverting input terminal of the first operational amplifier U2 is electrically connected to the first terminal of the third resistor RC1 and the first terminal of the LED, the output terminal of the first operational amplifier U2 is electrically connected to the base of the first transistor Q3, the emitter of the first transistor Q3 is electrically connected to the driving unit 41, the first terminal of the second capacitor and the second terminal of the LED, the second terminal of the second capacitor C2 is electrically connected to the inverting input terminal of the first operational amplifier U2, the second terminal of the third resistor RC1 is electrically connected to the first terminal of the fourth resistor RC2 and the driving unit 41, and the second terminal of the fourth resistor RC2 is grounded. It can be understood that the negative feedback adjusting unit 44 forms a feedback comparison mechanism through a cloud amplifier, the reference voltage inputted to the non-inverting input terminal of the first operational amplifier U2 is the voltage across the fourth resistor RC1, and the third resistor RC1 is a sampling resistor. When the voltage to ground on the fourth resistor rises, the voltage is fed back to the inverting input end of the first operational amplifier, the voltage of the output end of the first operational amplifier is reduced, the voltage of the first triode is increased, the current is increased, so that the current distributed from the LED lamp is increased, the total current of the LED lamp is reduced, a negative feedback mechanism is formed, and the problems of ripple and noise of a current switching effect are solved.
Preferably, the second RCD absorbent unit is identical in structure to the first RCD absorbent unit. The second RCD absorbent unit structure is shown in fig. 2 and will not be described in detail herein.
Preferably, the driving unit 41 includes a driver U1, a fifth resistor R1, a sixth resistor R2, a seventh resistor R3, an eighth resistor R4, a ninth resistor R9, and a third capacitor C3. Please refer to fig. 2 for the connection among the driver U1, the fifth resistor R1, the sixth resistor R2, the seventh resistor R3, the eighth resistor R4, the ninth resistor R9, and the third capacitor C3. It can be understood that the main control module is electrically connected to the driving unit, and the driver supports analog dimming and digital dimming. Analog dimming performs continuous linear adjustment by directly changing the input voltage through the CTRL pin, and digital dimming performs adjustment by changing the duty cycle of the input PWM signal through the PWM pin.
Preferably, the over-temperature protection module comprises a temperature-sensitive resistor; the temperature-sensitive resistor is connected with the second resistor in parallel. It can be understood that the second resistor is a sampling resistor, a temperature-sensitive resistor is added at the sampling resistor, and when the temperature of the system is close to the preset maximum allowable temperature, the current is reduced, so that the heat is timely dissipated.
Example two
The device comprises a high-power low-noise intelligent adjustable LED driving circuit which is convenient to adjust, wherein the high-power low-noise intelligent adjustable LED driving circuit is the high-power low-noise intelligent adjustable LED driving circuit of any one of the embodiments.
To sum up, the utility model discloses a high-power low-noise intelligent adjustable LED drive circuit, which comprises an upper computer 1, a main control module 2, an external dimming module 3, a noise reduction module 4, an over-temperature protection module 5, a communication module 6 and a switch power supply module 7; the upper computer 1 is electrically connected with the communication module 6, the communication module 6 is electrically connected with the main control module 2, the main control module 2 is electrically connected with the external dimming module 3, and the external dimming module 3, the switching power supply module 7 and the over-temperature protection module 5 are respectively electrically connected with the noise reduction module 4; the switching power supply module 7 is used for controlling the on-off of the system; the over-temperature protection module 5 is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer 1 and the main control module 2 are used for inputting pulse dimming signals of digital quantity; the communication module 6 is used for realizing communication connection between the upper computer and the main control module 2; the external dimming module 3 is used for inputting an adjustable voltage to adjust the brightness of the LED, and the noise reduction module 4 converts the switching characteristic of the output current into a linear output to reduce the switching noise. The utility model discloses there is the noise low and the reliable advantage of output.
The intelligent adjustable LED driving circuit with high power and low noise provided by the present invention is introduced in detail, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, to the general technical personnel in this field, according to the utility model discloses an idea, all can have the change part on concrete implementation and application scope, to sum up, this description content only is the utility model discloses an embodiment, does not consequently restrict the utility model discloses a patent scope, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing did, or directly or indirectly use in other relevant technical fields, all the same reason is included in the utility model discloses a patent protection scope. And should not be construed as limiting the invention.
Claims (8)
1. The utility model provides a high-power low-noise intelligent adjustable LED drive circuit which characterized in that includes: the device comprises an upper computer, a main control module, an external dimming module, a noise reduction module, an over-temperature protection module, a communication module and a switching power supply module; the upper computer is electrically connected with the communication module, the communication module is electrically connected with the main control module, the main control module is electrically connected with the external dimming module, and the external dimming module, the switching power supply module and the over-temperature protection module are respectively and electrically connected with the noise reduction module; the switching power supply module is used for controlling the on-off of the system; the over-temperature protection module is used for reducing the power consumption of the whole circuit of the circuit when the temperature of the system is overhigh; the upper computer and the main control module are used for inputting pulse dimming signals of digital quantity; the communication module is used for realizing communication connection between the upper computer and the main control module; the external dimming module is used for inputting adjustable voltage to adjust the brightness of the LED, and the noise reduction module converts the switching characteristic of the output current into linear output to reduce the switching noise.
2. The high-power low-noise intelligent adjustable LED driving circuit according to claim 1, wherein the noise reduction module comprises a driving unit, a first RCD absorption unit, a second RCD absorption unit and a negative feedback adjustment unit; the first RCD absorption unit is respectively electrically connected with the switching power supply module, the driving unit and the first end of the LED, the second RCD absorption unit is respectively electrically connected with the switching power supply module, the driving unit and the negative feedback regulation unit, and the negative feedback regulation unit is electrically connected with the second end of the LED.
3. The high power low noise intelligent tunable LED driving circuit according to claim 1, further comprising a display module; the display module is used for displaying the voltage value of the adjustable voltage.
4. The high-power low-noise intelligent adjustable LED driving circuit according to claim 2, wherein the first RCD absorption unit comprises a first field effect transistor, a first diode, a first capacitor, a first resistor and a second resistor; the drain electrode of the first field effect, the first end of the first diode and the first end of the first resistor are respectively electrically connected with an input power supply, the second end of the first diode and the second end of the first resistor are electrically connected with the first end of the first capacitor, the second end of the first capacitor is electrically connected with the source electrode of the first field effect transistor, the grid electrode of the first field effect transistor is electrically connected with the first end of the second resistor, and the second end of the second resistor is electrically connected with the driving unit.
5. The high-power low-noise intelligent adjustable LED driving circuit according to claim 2, wherein the negative feedback adjusting unit comprises a first operational amplifier, a first triode, a second capacitor, a third resistor and a fourth resistor; the non-inverting input end of the first operational amplifier is used for inputting reference voltage, the inverting input end of the first operational amplifier is electrically connected with the first end of the third resistor and the first end of the LED, the output end of the first operational amplifier is electrically connected with the base electrode of the first triode, the emitter electrode of the first triode is electrically connected with the driving unit, the first end of the second capacitor and the second end of the LED, the second end of the second capacitor is electrically connected with the inverting input end of the first operational amplifier, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the driving unit, and the second end of the fourth resistor is grounded.
6. The high-power low-noise intelligent tunable LED driving circuit according to claim 4, wherein the second RCD absorption unit is identical in structure to the first RCD absorption unit.
7. The high-power low-noise intelligent adjustable LED driving circuit according to claim 6, wherein the over-temperature protection module comprises a temperature-sensitive resistor; the temperature-sensitive resistor is connected with the second resistor in parallel.
8. An apparatus comprising the high power low noise intelligent tunable LED driving circuit according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020108033.9U CN211656468U (en) | 2020-01-17 | 2020-01-17 | High-power low-noise intelligent adjustable LED drive circuit and device |
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| CN202020108033.9U CN211656468U (en) | 2020-01-17 | 2020-01-17 | High-power low-noise intelligent adjustable LED drive circuit and device |
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| CN211656468U true CN211656468U (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112492718A (en) * | 2020-12-02 | 2021-03-12 | 上海裕芯电子科技有限公司 | Low-voltage over-temperature current-reducing LED drive circuit |
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- 2020-01-17 CN CN202020108033.9U patent/CN211656468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112492718A (en) * | 2020-12-02 | 2021-03-12 | 上海裕芯电子科技有限公司 | Low-voltage over-temperature current-reducing LED drive circuit |
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