CN111083852A - High-power pulse constant-current LED driving power supply - Google Patents
High-power pulse constant-current LED driving power supply Download PDFInfo
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- CN111083852A CN111083852A CN202010050811.8A CN202010050811A CN111083852A CN 111083852 A CN111083852 A CN 111083852A CN 202010050811 A CN202010050811 A CN 202010050811A CN 111083852 A CN111083852 A CN 111083852A
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Abstract
The invention discloses a high-power pulse constant-current LED driving power supply, which comprises a voltage-reducing constant-current module, and an AC/DC power supply, a dimming module and an LED lighting module which are respectively connected with the voltage-reducing constant-current module; the voltage reduction constant current module comprises a processor and a buck circuit connected and controlled by the processor, and the buck circuit receives a signal of the external dimming module and reduces the voltage of direct current provided by the AC/DC power supply; the voltage reduction constant current module further comprises a current sampling module and a voltage sampling module, the current sampling module and the voltage sampling module are used for respectively collecting the output current and the voltage of the buck circuit and sending collected information to the processor to form current feedback to control the buck circuit to output stable current. According to the high-power pulse constant-current LED driving power supply, electric isolation is achieved through the AC/DC power supply, efficient electric energy conversion can be achieved through the buck circuit, and stable current output is achieved; each voltage reduction module can realize controllable output current, can meet the requirements of LED lighting modules under different currents and voltages, and is reliable in work, strong in practicability and convenient to popularize.
Description
Technical Field
The invention relates to the field of LED illumination, in particular to a high-power pulse constant-current LED driving power supply.
Background
The LED is a semiconductor device capable of converting electric energy into optical energy, has the characteristics of energy conservation, electricity saving, environmental protection, long service life and the like, and is popular among people. The LEDs have two requirements on the power supply, one is that the output voltage is greater than the on-state voltage of the LEDs, and the other is that the operating current is required to be stable. For some places requiring high-power illumination, such as airports, stations and the like, more strict requirements are imposed on the stability of the illumination LED. Most of LED constant current sources on the market have large current ripples, the current overshoot is large when the LED constant current sources are started, and the service life of the LED is influenced by long-time work.
Disclosure of Invention
The invention aims to: the high-power pulse constant-current LED driving power supply is provided, the loss is reduced while the output current quality is improved, the conversion efficiency is improved, and the voltage reduction constant-current module implementation mode of software dimming can be realized.
The technical scheme of the invention is as follows:
a high-power pulse constant-current LED driving power supply comprises a voltage reduction constant-current module, and an AC/DC power supply, a dimming module and an LED lighting module which are respectively connected with the voltage reduction constant-current module; the voltage reduction constant current module realizes constant current DC-DC conversion of AC/DC power output, and the dimming module controls the voltage reduction constant current module to output controllable current and adjust the brightness of the LED lighting module.
Preferably, the LED module is a string or a plurality of strings of high-power lighting LEDs.
Preferably, the voltage reduction constant current module comprises a processor and a buck circuit connected and controlled by the processor, and the buck circuit receives a signal of the external dimming module and reduces the voltage of the direct current provided by the AC/DC power supply; the voltage reduction constant current module further comprises a current sampling module and a voltage sampling module, the current sampling module and the voltage sampling module are used for respectively collecting the output current and the voltage of the buck circuit and sending collected information to the processor to form current feedback to control the buck circuit to output stable current.
Preferably, the processor further performs overcurrent, short circuit and overvoltage protection on the LED lighting module according to the collected buck circuit output current and voltage.
Preferably, the dimming module is connected with the voltage reduction constant current module by a CAN bus or an analog signal transmission line for dimming.
Preferably, the AC/DC power supply is a high-power voltage-stabilized power supply, and after the power supply is powered on, the voltage provided by the AC/DC power supply exceeds the maximum working voltage of the LED module.
Preferably, the AC/DC power supply supplies power to a plurality of voltage reduction constant current modules and LED lighting modules, and the power of the LED modules configured for each voltage reduction constant current module does not need to be the same.
Preferably, the dimming module is respectively connected to control the output current and the on/off of each path of voltage reduction module.
The invention has the advantages that:
according to the high-power pulse constant-current LED driving power supply, electric isolation is achieved through the AC/DC power supply, efficient electric energy conversion can be achieved through the buck circuit, and stable current output is achieved; each voltage reduction module can realize controllable output current, can meet the requirements of LED lighting modules under different currents and voltages, and is reliable in work, strong in practicability and convenient to popularize.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is an overall topology diagram of a high-power pulse constant-current LED driving power supply of the present invention;
fig. 2 is a structural topology diagram of the buck constant-current module.
Detailed Description
As shown in fig. 1, the high-power pulse constant-current LED driving power supply of the present invention includes a step-down constant-current module, and an AC/DC power supply, a dimming module, and an LED lighting module respectively connected thereto; the AC/DC power supply supplies power to a plurality of groups of voltage reduction constant current modules and the LED lighting module, the voltage reduction constant current modules realize constant current DC-DC conversion of the output of the AC/DC power supply, and the dimming module controls the voltage reduction constant current modules to output controllable current and adjust the brightness of the LED lighting module. The LED module is a string or a plurality of strings of high-power lighting LEDs.
As shown in fig. 2, the step-down constant current module includes a processor and a buck circuit connected and controlled by the processor, and the buck circuit receives a signal from an external dimming module and steps down a direct current provided by an AC/DC power supply; the voltage reduction constant current module further comprises a current sampling module and a voltage sampling module, the current sampling module and the voltage sampling module are used for respectively collecting the output current and the voltage of the buck circuit and sending collected information to the processor to form current feedback to control the buck circuit to output stable current. The processor also carries out overcurrent, short circuit and overvoltage protection on the LED lighting module according to the collected buck circuit output current and voltage.
The dimming module is connected with the voltage reduction constant current module through a CAN bus or an analog signal transmission line to perform dimming.
The AC/DC power supply is a high-power voltage-stabilized power supply, and provides voltage exceeding the maximum working voltage of the LED module after being electrified.
The power of the LED modules of each voltage-reducing constant-current module does not need to be the same.
The dimming module is respectively connected with and controls the output current and the on-off of each path of voltage reduction module.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (8)
1. A high-power pulse constant-current LED driving power supply is characterized by comprising a voltage-reducing constant-current module, and an AC/DC power supply, a dimming module and an LED lighting module which are respectively connected with the voltage-reducing constant-current module; the voltage reduction constant current module realizes constant current DC-DC conversion of AC/DC power output, and the dimming module controls the voltage reduction constant current module to output controllable current and adjust the brightness of the LED lighting module.
2. The high-power pulse constant-current LED driving power supply according to claim 1, wherein the LED module is one or more strings of high-power lighting LEDs.
3. The high-power pulse constant-current LED driving power supply according to claim 1, wherein the voltage-reducing constant-current module comprises a processor and a buck circuit connected and controlled by the processor, and the buck circuit receives a signal of an external dimming module and reduces the direct current provided by the AC/DC power supply; the voltage reduction constant current module further comprises a current sampling module and a voltage sampling module, the current sampling module and the voltage sampling module are used for respectively collecting the output current and the voltage of the buck circuit and sending collected information to the processor to form current feedback to control the buck circuit to output stable current.
4. The high-power pulse constant-current LED driving power supply according to claim 3, wherein the processor further performs overcurrent, short-circuit and overvoltage protection on the LED lighting module according to the collected buck circuit output current and voltage.
5. The high-power pulse constant-current LED driving power supply according to claim 4, wherein the dimming module is connected with the voltage-reduction constant-current module for dimming by adopting a CAN bus or an analog signal transmission line.
6. The high-power pulse constant-current LED driving power supply according to claim 5, wherein the AC/DC power supply is a high-power voltage-stabilized power supply, and after being powered on, the AC/DC power supply provides a voltage exceeding the maximum working voltage of the LED module.
7. The high-power pulse constant-current LED driving power supply according to claim 6, wherein the AC/DC power supply supplies power to the plurality of voltage-reducing constant-current modules and the LED lighting modules, and the power of the LED modules of each voltage-reducing constant-current module does not need to be the same.
8. The high-power pulse constant-current LED driving power supply according to claim 7, wherein the dimming module is respectively connected to control the output current and the on/off of each voltage reduction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050811.8A CN111083852A (en) | 2020-01-17 | 2020-01-17 | High-power pulse constant-current LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050811.8A CN111083852A (en) | 2020-01-17 | 2020-01-17 | High-power pulse constant-current LED driving power supply |
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| Publication Number | Publication Date |
|---|---|
| CN111083852A true CN111083852A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010050811.8A Pending CN111083852A (en) | 2020-01-17 | 2020-01-17 | High-power pulse constant-current LED driving power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112218413A (en) * | 2020-09-03 | 2021-01-12 | 厦门市智联信通物联网科技有限公司 | High-efficiency high-power isolation dimming signal amplifying circuit |
-
2020
- 2020-01-17 CN CN202010050811.8A patent/CN111083852A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112218413A (en) * | 2020-09-03 | 2021-01-12 | 厦门市智联信通物联网科技有限公司 | High-efficiency high-power isolation dimming signal amplifying circuit |
| CN112218413B (en) * | 2020-09-03 | 2021-10-01 | 厦门市智联信通物联网科技有限公司 | High-efficiency high-power isolation dimming signal amplifying circuit |
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