CN210183593U - LED projection lamp driving circuit - Google Patents
LED projection lamp driving circuit Download PDFInfo
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- CN210183593U CN210183593U CN201821881508.7U CN201821881508U CN210183593U CN 210183593 U CN210183593 U CN 210183593U CN 201821881508 U CN201821881508 U CN 201821881508U CN 210183593 U CN210183593 U CN 210183593U
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Abstract
The utility model discloses a driving circuit of an LED projection lamp, which comprises a direct current power supply input unit, an IC power supply circuit, a digital signal input unit, a misconnection protection unit, a total loop current detection unit, a total loop voltage detection unit, a 4-way driver, an LED open circuit detection unit, a singlechip, a DAC digital-to-analog converter, a temperature detection unit and a first data isolation input unit, wherein the direct current power supply input unit is respectively connected with the single chip microcomputer through the main loop current detection unit and the main loop voltage detection unit, the single chip microcomputer is connected with ANA analog dimming signal ends corresponding to the 4-path drivers through DAC digital-to-analog converters, PWM pulse signal ends corresponding to the 4-path drivers are respectively connected with pulse dimming signal detection ends corresponding to the single chip microcomputer, the outputs of the 4-path drivers are respectively connected with LED lamps with corresponding colors, and the outputs of the 4-path drivers are respectively connected with the detection end of the singlechip through the LED open circuit detection unit. The circuit is simple in structure and more stable and safe.
Description
Technical Field
The utility model belongs to the technical field of a LED drive circuit's technique and specifically relates to a LED projecting lamp drive circuit.
Background
Currently, LED light sources are increasingly used in people's lives as a commonly used alternative light source, for example: the LED light source is widely applied to homes, corridors, building corridors, washing rooms and the like, and the LED light source gradually replaces the traditional incandescent lamp in lighting due to the advantages of high luminous efficiency, long service life, vivid color, environmental protection and the like.
With the wide application of LEDs, LED driving technology is becoming mature. The LED driving circuit is used for outputting constant current to the LED load so as to drive the LED lamp to normally work, and mainly comprises a voltage regulating circuit, a power conversion circuit and a control circuit. The control circuit is used for controlling the main switching tube in the power conversion circuit to be conducted intermittently, so that an input voltage signal received by the power conversion circuit is converted into a constant current signal and is output to the LED load, and the voltage regulating circuit is used for enabling the output voltage value to be constant. In the voltage regulating circuit and the power conversion circuit, an inductance element is indispensable.
However, the existing LED lamp driving circuit has a complex structure, poor circuit stability and less safety monitoring for the whole circuit, which results in the whole circuit being not safe enough, and thus needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a LED projecting lamp drive circuit who improves security and circuit structure is simple, circuit stability is good in order to solve above-mentioned prior art not enough.
In order to achieve the above object, the utility model relates to a LED projection lamp drive circuit, including following unit:
the direct-current power supply input unit is provided with positive and negative electrode reverse connection protection, overcurrent protection and filtering absorption pulses;
an IC power supply circuit for supplying power to each device in the entire circuit;
a digital signal input unit for inputting a digital signal,
the data input connection with the digital signal input unit prevents the misconnection protection unit that high-voltage connects to the signal line;
a total loop current detection unit which is connected with the direct current power supply input unit and is used for detecting the current flowing through the circuit and checking and calculating the current data by using the amplification factor of the amplifier;
the main loop voltage detection unit is connected with the direct current power supply input unit and used for detecting the voltage on the line and checking out voltage data by using a voltage dividing resistor;
the LED lamp driving circuit is provided with 4 paths of drivers which are respectively used for driving LED lamps with different colors, provide constant current driving for LEDs with corresponding colors and simultaneously adjust the light by PWM and ANA;
the LED open circuit detection unit is connected with the driver of each branch circuit and is used for detecting whether the corresponding branch circuit is open or not;
the singlechip is used for receiving the data in the circuit, checking and processing the data, and then feeding back the checked data of each test point;
the DAC is connected with the singlechip and used for outputting analog signal conversion and finally obtaining the working temperature of the corresponding 4-channel driver;
a user acquires the temperature of the chip positions of the DAC and the singlechip, and then detects the temperature of the corresponding chip to realize two groups of temperature detection units for simultaneously detecting a plurality of groups of addresses;
the first data isolation input unit is used for being connected between the single chip microcomputer and the misconnection protection unit to realize isolation of input data, so that the single chip microcomputer is protected from surge pulse on a data line, and the control system can run more stably;
wherein, DC power supply input unit be connected with the singlechip through total return circuit current detection unit and total return circuit voltage detection unit respectively, the singlechip pass through DAC digital-to-analog converter and be connected with the ANA simulation light modulation signal end that 4 way drivers correspond respectively, and the PWM pulse signal end that 4 way drivers correspond is connected with the pulse light modulation signal detection end that the singlechip corresponds respectively, the LED lamp of corresponding colour is connected respectively to the output of 4 way drivers, and passes through respectively at the output of 4 way drivers the detection end of LED open circuit detection unit and singlechip be connected.
Furthermore, the single chip microcomputer is also connected with a data output unit which utilizes a line relay to realize the influence of disconnection on the back-end circuit and simultaneously writes address data at the back-end circuit, and the data output unit is connected with the single chip microcomputer through a second data isolation input unit.
Further, the first data isolation input unit is used for isolating surge pulse signals on the data line.
Furthermore, the misconnection protection unit is a protection device which is in an open circuit state when the high-voltage power is misconnected, no signal is output, the circuit does not have triggering voltage input, and the whole circuit does not work.
The utility model provides a LED projecting lamp drive circuit, the utility model has the advantages of it is following:
1) the circuit structure is simple, the operation is more convenient, simultaneously because set up misconnection protection, input protection, temperature detection with this realization whole circuit safer, in case break down open a way immediately, finally improve the security of using, set up in addition simulation dimming and pwm dimming can be in a circuit the inside and noiseless, the whole circuit drive that finally makes is more stable to can realize that multiunit address detects simultaneously, improve detection efficiency.
Description of the drawings:
fig. 1 is a schematic structural diagram of a driving circuit of an LED projector in embodiment 1;
FIG. 2 is a schematic diagram of a 4-way LED lamp driving circuit in embodiment 1;
fig. 3 is a schematic circuit diagram of a dc power supply input unit in embodiment 1;
FIG. 4 is a schematic circuit diagram of an IC power supply circuit in embodiment 1;
FIG. 5 is a schematic diagram of a two-way master loop detection unit in embodiment 1;
fig. 6 is a schematic circuit diagram of a data output unit in embodiment 1;
fig. 7 is a circuit schematic diagram of a chip microcomputer in embodiment 1;
FIG. 8 is an overall circuit schematic diagram of two-way data isolation in embodiment 1;
FIG. 9 is a schematic circuit diagram of two-way temperature detection in embodiment 1;
fig. 10 is a schematic circuit diagram of the analog signal rotation in embodiment 1.
In the reference symbols: 1. a DC power supply input unit; an IC power supply circuit; 3. a misconnection protection unit; 4. a total loop voltage detection unit; 5. a driver; 6, LED open circuit detection unit; 7. a single chip microcomputer; a DAC digital-to-analog converter; 9. a temperature detection unit; 10. a first data isolation input unit; 11. a second data isolation input unit; 12. a data output unit; 13. a digital signal input unit; 14. and a total loop current detection unit.
Detailed Description
The invention will be further described with reference to the following examples.
Example 1:
as shown in fig. 1 to 10, the driving circuit of the LED projector provided in this embodiment includes the following units:
a direct current power input unit 1 with positive and negative reverse connection protection, overcurrent protection, filtering and pulse absorption;
an IC power supply circuit 2 that supplies power to each device in the entire circuit;
a digital signal input unit 13 for inputting a digital signal,
a misconnection protection unit 3 connected with the data input of the digital signal input unit 13 for preventing high voltage connection to the signal line;
a total loop current detection unit 14 connected to the dc power input unit 1 for detecting a current flowing through the line and checking out current data by using an amplification factor of the amplifier;
a total loop voltage detection unit 4 connected with the direct current power supply input unit 1 and used for detecting the voltage on the line and checking out the voltage data by using a voltage division resistor;
the LED lamp driving circuit is provided with 4 paths of drivers 5 which respectively drive LED lamps with different colors, provide constant current drive for LEDs with corresponding colors and simultaneously adjust the light by PWM and ANA;
the LED open circuit detection unit 6 is connected with the driver 5 of each branch circuit and is used for detecting whether the corresponding branch circuit is open or not;
the singlechip 7 is used for receiving the data in the circuit, checking and processing the data, and then feeding back the checked data of each test point;
the DAC digital-to-analog converter 8 is connected with the singlechip 7 and is used for outputting analog signal conversion and finally obtaining the working temperature of the corresponding 4-channel driver 5;
a user obtains the temperature of the chip positions of the DAC 8 and the singlechip 7, and then detects the temperature of the corresponding chip to realize two groups of temperature detection units 9 for simultaneously detecting a plurality of groups of addresses;
the first data isolation input unit 10 is used for being connected between the singlechip 7 and the misconnection protection unit 3 to realize isolation of input data, so that the singlechip 7 is protected to isolate surge pulses on a data line, and the control system can run more stably;
wherein, DC power supply input unit 1 be connected with singlechip 7 through total return current detecting element 14 and total return voltage detecting element 4 respectively, singlechip 7 through DAC digital-to-analog converter 8 respectively with 4 way driver 5 correspond ANA simulation light modulation signal end connection, and 4 way driver 5 correspond PWM pulse signal end respectively with singlechip 7 correspond the pulse light modulation signal detection end connection, the LED lamp of corresponding colour is connected respectively to 4 way driver 5's output, and passes through respectively at 4 way driver 5's output LED open circuit detecting element 6 and singlechip 7's detection end connection.
Further, the single chip microcomputer 7 is further connected with a data output unit 12 which utilizes a line relay to realize the influence of disconnection on a back end circuit and simultaneously writes address data at the back end circuit, and the data output unit 12 is connected with the single chip microcomputer 7 through a second data isolation input unit 11.
Further, the first data isolation input unit 10 is configured to isolate a surge pulse signal on the data line.
Further, the mis-connection protection unit 3 is a protection device which is in an open circuit state when the high voltage is wrongly connected, no signal is output, the circuit has no trigger voltage input, and the whole circuit does not work.
This circuit structure is simple, and it is more convenient to operate, simultaneously owing to set up misconnection protection, input protection, temperature detection and realize that whole circuit is safer with this, in case break down open a way immediately, finally improve the security of using, set up in addition simulation dimming and pwm dimming can be in a circuit the inside and noiseless, and the whole circuit drive that finally makes is more stable to can realize that multiunit address detects simultaneously, improve detection efficiency. And the applicant needs to say that the specific circuits of the units belong to the conventional technical means in the field, so that the specific circuits are not described in detail.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a LED projecting lamp drive circuit which characterized in that includes following unit:
a direct current power input unit (1) with positive and negative reverse connection protection, overcurrent protection and filtering absorption pulse;
an IC power supply circuit (2) for supplying power to each device in the entire circuit;
a digital signal input unit (13),
a misconnection protection unit (3) connected with the data input of the digital signal input unit (13) for preventing high voltage connection to the signal line;
a total loop current detection unit (14) which is connected with the direct current power supply input unit (1) and is used for detecting the current flowing through the circuit and checking and calculating the current data by using the amplification factor of the amplifier;
a total loop voltage detection unit (4) which is connected with the direct current power supply input unit (1) and is used for detecting the voltage on the line and checking out the voltage data by using a divider resistor;
the LED lamp driving circuit is characterized by comprising 4-path drivers (5) which are used for driving LED lamps with different colors respectively, providing constant current driving for LEDs with corresponding colors and simultaneously adjusting light by PWM and ANA;
the LED open circuit detection unit (6) is connected with the driver (5) of each branch circuit and is used for detecting whether the corresponding branch circuit is open or not;
the singlechip (7) is used for receiving the data in the circuit, checking and processing the data, and then feeding back the checked data of each test point;
the DAC digital-to-analog converter (8) is connected with the singlechip (7) and is used for outputting analog signal conversion and finally obtaining the working temperature of the corresponding 4-channel driver (5);
a user obtains the temperature of the chip positions of the DAC digital-to-analog converter (8) and the singlechip (7), and then detects the temperature of the corresponding chip to realize two groups of temperature detection units (9) for simultaneously detecting a plurality of groups of addresses;
the first data isolation input unit (10) is used for being connected between the single chip microcomputer (7) and the misconnection protection unit (3) to realize isolation of input data, so that the single chip microcomputer (7) is protected to isolate surge pulses on a data line, and more stable operation of a control system is realized;
wherein, DC power supply input unit (1) be connected with singlechip (7) through total return current detecting element (14) and total return voltage detecting element (4) respectively, singlechip (7) through DAC digital-to-analog converter (8) respectively with the ANA simulation that 4 way driver (5) correspond signal end connection of adjusting luminance, and the PWM pulse signal end that 4 way driver (5) correspond respectively with singlechip (7) the pulse signal detection end connection of adjusting luminance that corresponds, the LED lamp of corresponding colour is connected respectively to the output of 4 way driver (5), and passes through respectively at the output of 4 way driver (5) the detection end of LED open circuit detecting element (6) and singlechip (7) be connected.
2. The LED projector driving circuit as claimed in claim 1, wherein the single chip microcomputer (7) is further connected with a data output unit (12) which uses a line relay to realize disconnection to affect the back-end circuit and simultaneously write address data of the back-end circuit, and the data output unit (12) is connected with the single chip microcomputer (7) through a second data isolation input unit (11).
3. The driving circuit of an LED projector as claimed in claim 1 or 2, wherein the first data isolation input unit (10) is used for isolating the surge pulse signal on the data line.
4. The driving circuit of an LED projection lamp according to claim 1 or 2, wherein the mis-connection protection unit (3) is a protection device that when the high voltage is wrongly connected, no signal is output, the circuit has no trigger voltage input, the whole circuit does not work, and an open circuit state is formed.
5. The driving circuit of an LED projection lamp according to claim 3, wherein the mis-connection protection unit (3) is a protection device that when the high voltage is incorrectly connected, no signal is output, the circuit has no trigger voltage input, the whole circuit does not work, and an open circuit state is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881508.7U CN210183593U (en) | 2018-11-15 | 2018-11-15 | LED projection lamp driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881508.7U CN210183593U (en) | 2018-11-15 | 2018-11-15 | LED projection lamp driving circuit |
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| Publication Number | Publication Date |
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| CN210183593U true CN210183593U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821881508.7U Withdrawn - After Issue CN210183593U (en) | 2018-11-15 | 2018-11-15 | LED projection lamp driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
-
2018
- 2018-11-15 CN CN201821881508.7U patent/CN210183593U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
| CN109302773B (en) * | 2018-11-15 | 2024-06-14 | 常州格林照明股份有限公司 | LED projection lamp driving circuit |
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Granted publication date: 20200324 Effective date of abandoning: 20240614 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200324 Effective date of abandoning: 20240614 |