CN218336504U - LED drive circuit based on multi-channel linear constant current and adjustable in output - Google Patents
LED drive circuit based on multi-channel linear constant current and adjustable in output Download PDFInfo
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- CN218336504U CN218336504U CN202222673241.5U CN202222673241U CN218336504U CN 218336504 U CN218336504 U CN 218336504U CN 202222673241 U CN202222673241 U CN 202222673241U CN 218336504 U CN218336504 U CN 218336504U
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Abstract
The utility model discloses an output-adjustable LED drive circuit based on multichannel linear constant current, which comprises an MCU module, a key module and a linear drive module; the key module is connected with an SPI pin of the MCU module and is used for outputting an increase and decrease signal to the MCU module; the linear driving module comprises a first driving chip and a second driving chip, the input end of the first driving chip is connected with the output end of the MCU module, the output end of the first driving chip is connected with the lamp, the input end of the second driving chip is connected with the output end of the MCU module, and the output end of the second driving chip is connected with the LED lamp. The utility model provides a based on linear constant current of multichannel and output adjustable LED drive circuit can the various LED lamps and lanterns loads of adaptation, has solved the box function singleness of lighting a lamp at present, to the problem of specific load preparation specific point lamp box, the cost is reduced, and portable helps improving the relevant staff's of car light work efficiency.
Description
Technical Field
The utility model relates to a based on linear constant current of multichannel and output adjustable LED drive circuit belongs to car light technical field.
Background
At present, most lighting boxes are single in function, are driven by the driving current required by specific LED loads, and are single in function. But the car light includes various lamps such as the far and near light of head-light, indicator, day driving light, position lamp, back combination lamp and indoor lamp and atmosphere lamp, and the purpose of the test of lighting can't be realized to the electric current requirement that current point lamp box can't satisfy different lamps and lanterns, and the volume of current point lamp box is generally big partially, carries the adaptation inconvenient, and manufacturing cost is also high.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome prior art not enough, provide one kind based on the linear constant current of multichannel and export adjustable LED drive circuit, can the various LED lamps and lanterns loads of adaptation, solved the box function singleness of lighting a lamp at present, to the problem of specific load preparation specific point lamp box, the cost is reduced, portable helps improving the work efficiency of the relevant staff of car light.
In order to solve the technical problem, the technical scheme of the utility model is that:
an LED drive circuit based on multi-channel linear constant current and adjustable in output comprises an MCU module, a key module and a linear drive module;
the key module is connected with an SPI pin of the MCU module and is used for outputting an increase and decrease signal to the MCU module;
the linear driving module comprises a first driving chip and a second driving chip, the input end of the first driving chip is connected with the output end of the MCU module, the output end of the first driving chip is connected with a lamp, the input end of the second driving chip is connected with the output end of the MCU module, and the output end of the second driving chip is connected with the LED lamp;
the first driving chip and the second driving chip are respectively used for driving LED lamps with different loads.
Further, the model of the first driving chip is TPS92682-Q1.
Further, the model of the second driving chip is TPS92610.
And the display screen module is connected with the SPI pin of the MCU module and is used for displaying the driving voltage of the linear driving module.
Further, still include the LDO module, the input of LDO module is connected the input power, the output of LDO module is the MCU module power supply.
Further, the model of the MCU module is S9KEAZ128AMLH.
Further, the key module comprises a key S1, a key S2, a key S3, a key S4, a resistor R8, a resistor R11, a resistor R52 and a resistor R62, wherein the key S1, the key S2, the key S3 and the key S4 are respectively connected with an SPI pin of the MCU module, one end of the resistor R8 is connected with the key S1, the other end of the resistor R8 is connected with a power supply VDD, one end of the resistor R11 is connected with the key S2, the other end of the resistor R11 is connected with the power supply VDD, one end of the resistor R52 is connected with the key S3, the other end of the resistor R52 is connected with the power supply VDD, one end of the resistor R62 is connected with the key S4, and the other end of the resistor R62 is connected with the power supply VDD.
Having adopted above-mentioned technical scheme, the utility model discloses can realize driven purpose to the LED load of difference, can adjust the PWM duty cycle of MCU module output and then the electric current of control output according to the input of outside button to this deals with different LED loads, just the utility model discloses a circuit structure is simple, based on the utility model discloses the box volume of lighting a lamp of making is less, only the palm is big or small like, portable and make things convenient for relevant LED staff's such as optics, heat use. The cost is effectively reduced, the problem that different LED loads need different lighting boxes to be lighted is avoided, and the working efficiency is improved. The LED lamp has the advantages of being capable of well solving the problems that output capacity is not enough, multiple devices are needed for lighting, high in integration level, complete in function, wide in applicability, convenient to carry and the like, and has certain universality and convenience for lighting of various LED loads.
Drawings
Fig. 1 is a schematic block diagram of the LED driving circuit based on multi-channel linear constant current and adjustable output of the present invention;
fig. 2 is a schematic circuit diagram of the MCU module and the key module of the present invention;
fig. 3 is a schematic circuit diagram of a first driving chip of the present invention;
fig. 4 is a schematic circuit diagram of a second driving chip of the present invention;
fig. 5 is a schematic circuit diagram of the LDO module of the present invention.
Detailed Description
In order that the present invention may be more clearly understood, the following detailed description is given with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides an output-adjustable LED driving circuit based on multi-channel linear constant current, which includes an MCU module, a key module, a linear driving module, and a display module.
Specifically, as shown in fig. 1, the button module of this embodiment is connected with the SPI pin of the MCU module, and the button module is used for outputting an increase/decrease signal to the MCU module, and adjusting the PWM duty cycle output by the MCU module to adjust the output current. As shown in fig. 2, the MCU module of this embodiment adopts a monolithic chip U1 with model S9KEAZ128AMLH, and is powered by the LDO module at 5V. As shown in fig. 5, an input end of the LDO module is connected to an input power supply, an output end of the LDO module supplies power to the MCU module, and the LDO module uses a power chip U4 of the type TPS7a6650-Q1 to convert the input power supply into a voltage of 5V.
The linear driving module comprises a first driving chip U3 and a second driving chip U2, the input end of the first driving chip U3 is connected with the output end of the MCU module, the output end of the first driving chip U3 is connected with the lamp, the input end of the second driving chip U2 is connected with the output end of the MCU module, the output end of the second driving chip U2 is connected with the LED lamp, and the first driving chip U3 and the second driving chip U2 are respectively used for driving the LED lamps with different loads.
As shown in fig. 3, the model of the first driving chip U3 of this embodiment is TPS92682-Q1, and the TPS92682-Q1 outputs a current greater than 200ma, so as to drive an LED lamp with a large load, such as a headlight, a high beam, and a dipped headlight.
As shown in fig. 4, the model of the second driving chip U2 of this embodiment is a TPS92610, and the TPS92610 outputs a current smaller than 200ma, so as to drive an LED lamp with a smaller load, such as a signal lamp, a daytime running lamp, a position lamp, and a turn signal lamp.
The linear driving module mainly comprises two parts, namely TPS92682-Q1 and TPS92610, which are respectively responsible for driving large current and small current. Both can set for output current through the value that sets up reference resistance among the drive circuit, also can give MCU increase and decrease signal through the button module simultaneously, adjust the PWM duty cycle of output and then adjust output current's size and carry out PWM and adjust luminance. And under the constant current mode, a dual-channel boosting or reducing LED driver topology is supported.
The display screen module is connected with the SPI pin of the MCU module through a display screen interface, the display screen module is used for displaying the driving voltage of the adjusted linear driving module, and the display screen module adopts a conventional liquid crystal display screen on the market.
Specifically, as shown in fig. 2, the key module of this embodiment includes a key S1, a key S2, a key S3, a key S4, a resistor R8, a resistor R11, a resistor R52, and a resistor R62, the key S1, the key S2, a key S3, and a key S4 are respectively connected to the SPI pin of the MCU module, one end of the resistor R8 is connected to the key S1, the other end of the resistor R8 is connected to the power supply VDD, one end of the resistor R11 is connected to the key S2, the other end of the resistor R11 is connected to the power supply VDD, one end of the resistor R52 is connected to the key S3, the other end of the resistor R52 is connected to the power supply VDD, one end of the resistor R62 is connected to the key S4, and the other end of the resistor R62 is connected to the power supply VDD. Different buttons are pressed, different increasing and decreasing signals can be output to the MCU module, the PWM duty ratio output by the MCU module is adjusted, and then the PWM dimming is carried out by adjusting the size of the output current.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a linear constant current of multichannel and output adjustable LED drive circuit which characterized in that: the device comprises an MCU module, a key module and a linear driving module;
the key module is connected with an SPI pin of the MCU module and is used for outputting an increase and decrease signal to the MCU module;
the linear driving module comprises a first driving chip and a second driving chip, the input end of the first driving chip is connected with the output end of the MCU module, the output end of the first driving chip is connected with a lamp, the input end of the second driving chip is connected with the output end of the MCU module, and the output end of the second driving chip is connected with the LED lamp;
the first driving chip and the second driving chip are respectively used for driving LED lamps with different loads.
2. The LED driving circuit based on multi-channel linear constant current and adjustable in output according to claim 1, is characterized in that: the model of the first driving chip is TPS92682-Q1.
3. The LED driving circuit based on multi-channel linear constant current and adjustable in output according to claim 1, is characterized in that: the model of the second driving chip is TPS92610.
4. The LED driving circuit based on the multi-channel linear constant current and adjustable in output as claimed in claim 1, wherein: the display screen module is connected with an SPI pin of the MCU module and is used for displaying the driving voltage of the linear driving module.
5. The LED driving circuit based on the multi-channel linear constant current and adjustable in output as claimed in claim 1, wherein: still include the LDO module, the input of LDO module is connected input power, the output of LDO module is the MCU module power supply.
6. The LED driving circuit based on the multi-channel linear constant current and adjustable in output as claimed in claim 1, wherein: the model of the MCU module is S9KEAZ128AMLH.
7. The LED driving circuit based on multi-channel linear constant current and adjustable in output according to claim 1, is characterized in that: the button module includes button S1, button S2, button S3, button S4, resistance R8, resistance R11, resistance R52 and resistance R62, button S1, button S2, button S3 and button S4 link to each other with the SPI pin of MCU module respectively, resistance R8 'S one end links to each other with button S1, power VDD is connected to resistance R8' S the other end, resistance R11 'S one end links to each other with button S2, power VDD is connected to resistance R11' S the other end, resistance R52 'S one end links to each other with button S3, power VDD is connected to resistance R52' S the other end, resistance R62 'S one end links to each other with button S4, power VDD is connected to resistance R62' S the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222673241.5U CN218336504U (en) | 2022-10-11 | 2022-10-11 | LED drive circuit based on multi-channel linear constant current and adjustable in output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222673241.5U CN218336504U (en) | 2022-10-11 | 2022-10-11 | LED drive circuit based on multi-channel linear constant current and adjustable in output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218336504U true CN218336504U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222673241.5U Active CN218336504U (en) | 2022-10-11 | 2022-10-11 | LED drive circuit based on multi-channel linear constant current and adjustable in output |
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| Country | Link |
|---|---|
| CN (1) | CN218336504U (en) |
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2022
- 2022-10-11 CN CN202222673241.5U patent/CN218336504U/en active Active
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