CN209433273U - A kind of realization circuit of program-controlled tabilized current power supply - Google Patents
A kind of realization circuit of program-controlled tabilized current power supply Download PDFInfo
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- CN209433273U CN209433273U CN201822147848.3U CN201822147848U CN209433273U CN 209433273 U CN209433273 U CN 209433273U CN 201822147848 U CN201822147848 U CN 201822147848U CN 209433273 U CN209433273 U CN 209433273U
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- power supply
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Abstract
The utility model relates to electronic circuit field more particularly to a kind of realization circuits of program-controlled tabilized current power supply, which is characterized in that including a single-chip microcontroller is used for output pwm signal；The pwm signal is converted to a d. c. voltage signal, including an input terminal, connect with the pwm signal by one second level operational amplifier circuit, and an output end exports the d. c. voltage signal；One power supply constant current chip is connect with the output end of the second level operational amplifier circuit, for generating output current signal under the action of the d. c. voltage signal；The single-chip microcontroller includes CAN communication interface, connects host computer by the CAN communication interface, the PWM that single-chip microcontroller described in the PC control sends different duty instructs the size of control laser headlight output electric current.The utility model can accurately control the output electric current of the big lamp controller of laser, and structure is simple, and scheme is practical.
Description
Technical field
The utility model relates to electronic circuit field more particularly to a kind of realization circuits of program-controlled tabilized current power supply.
Background technique
Currently, LED headlight, signal lamp are more more and more universal on automobile lamp, relevant control technology is also more and more mature, together
When, novel vehicle light illumination --- laser headlight slowly starts to grow up also with the progress of lighting engineering, and the following laser is big
The Drive Control Technique of lamp will be the direction of next development.Laser lighting control is different from LED illumination and controls, due to laser
Energy is high, in contrast energy hole wants complicated and important more, how by its energy hole illuminating tolerance interval and
Will not be out of control, being accurately controlled it and exporting electric current is wherein important a part.
Utility model content
The purpose of the utility model is to provide a kind of realization circuits of program-controlled tabilized current power supply, solve the above technology and ask
Topic.
The technical issues of the utility model is solved can be realized using following technical scheme:
A kind of realization circuit of program-controlled tabilized current power supply, which is characterized in that including,
One single-chip microcontroller is used for output pwm signal；
The pwm signal is converted to a d. c. voltage signal, including an input terminal by one second level operational amplifier circuit, and described
Pwm signal connection, an output end export the d. c. voltage signal；
One power supply constant current chip is connect with the output end of the second level operational amplifier circuit, in the d. c. voltage signal
Under the action of generate output current signal.
The single-chip microcontroller includes CAN communication interface, connects host computer, the host computer control by the CAN communication interface
It makes the single-chip microcontroller and sends the size that the PWM of different duty instructs control laser headlight to export electric current.
Preferably, the second level operational amplifier circuit, including the first operational amplifier, second operational amplifier, first fortune
It calculates amplifier non-inverting input terminal to connect with pwm signal, the second operational amplifier non-inverting input terminal is put with first operation
Big device output end connection.
Preferably, the second level operational amplifier circuit, including first resistor, second resistance, one end connection of the first resistor
The inverting input terminal of first operational amplifier, the inverting input terminal of one end connection second operational amplifier of the second resistance.
Preferably, the single-chip microcontroller is equipped with Sampling Interface, and the Sampling Interface connects the output of the power supply constant current chip
Electric current, and current value is fed back into the host computer.
Preferably, the power supply constant current chip has one the 6th pin, the 6th pin and the d. c. voltage signal
Connection.
Preferably, the d. c. voltage signal is accurate to 1mV, exports the precision 1mA of electric current.
The beneficial effect of above-mentioned technical proposal is:
The utility model can accurately control laser headlight control by designing the realization circuit of program-controlled tabilized current power supply a kind of
The output electric current of device processed, structure is simple, and scheme is practical.
Detailed description of the invention
Fig. 1 and Fig. 2 is the circuit diagram of the utility model
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
Shown in referring to Figures 1 and 2, a kind of realization circuit of program-controlled tabilized current power supply, which is characterized in that including,
One single-chip microcontroller is used for output pulse width modulated signal；
Pulse width modulating signal is converted to a d. c. voltage signal, including an input terminal by one second level operational amplifier circuit, with
Pulse width modulating signal connection, an output end export d. c. voltage signal；
One power supply constant current chip, connect with the output end of second level operational amplifier circuit, under the action of d. c. voltage signal
Generate output current signal.
Single-chip microcontroller includes CAN communication interface, connects host computer, single-chip microcontroller described in PC control by CAN communication interface
The pulse width modulation instructions for sending different duty go the size of control laser headlight output electric current.
As a kind of preferred embodiment of the utility model, second level operational amplifier circuit, including the first operational amplifier, second
Operational amplifier, the first operational amplifier non-inverting input terminal are connect with pulse width modulating signal, the same phase of second operational amplifier
Input terminal is connect with the first operational amplifier output terminal；One end of first resistor connects the anti-phase input of the first operational amplifier
End, the inverting input terminal of one end connection second operational amplifier of second resistance；Second level operational amplifier circuit utilizes single-chip microcontroller high-resolution
The pulse width modulation wave signal of rate is translated into corresponding precise dc voltage signal, removes control power supply constant current chip
Simulation light modulation mouth (i.e. linear regulation exports electric current mouth).
As a kind of preferred embodiment of the utility model, single-chip microcontroller is equipped with Sampling Interface, and Sampling Interface connects power supply
The output electric current of constant current chip, and current value is fed back into the host computer, it is ensured that output electric current within the limits prescribed, is realized
Accurate closed-loop control.
As a kind of preferred embodiment of the utility model, the modulation of Fig. 1 pulse width is the high-resolution of single-chip microcontroller output
The pulse width modulation wave signal of rate passes through the processing of intermediate 2 grades of operational amplifier circuits, the corresponding d. c. voltage signal of final output
VR1,
As a kind of preferred embodiment of the utility model, d. c. voltage signal VR1 is directly given to Fig. 2 power supply constant current core
The 6th pin simulation light modulation mouth (i.e. linear regulation exports electric current mouth) linear regulation of piece exports size of current.
As a kind of preferred embodiment of the utility model, pulse width modulation wave signal resolution is very high, You Qizhuan
The corresponding d. c. voltage signal changed can be as accurate as 1mV, to guarantee that the precision for exporting electric current can achieve 1mA.
The foregoing is merely the utility model preferred embodiment, be not intended to limit the embodiments of the present invention and
Protection scope should can appreciate that all in the utility model specification and diagram to those skilled in the art
Hold made equivalent replacement and obviously change obtained scheme, the protection model of the utility model should all be included in
In enclosing.
Claims (6)
1. a kind of realization circuit of program-controlled tabilized current power supply, which is characterized in that including,
One single-chip microcontroller is used for output pwm signal；
The pwm signal is converted to a d. c. voltage signal, including an input terminal by one second level operational amplifier circuit, is believed with the PWM
Number connection, an output end exports the d. c. voltage signal；
One power supply constant current chip is connect, for the work in the d. c. voltage signal with the output end of the second level operational amplifier circuit
With lower generation output current signal；
The single-chip microcontroller includes CAN communication interface, connects host computer, the PC control institute by the CAN communication interface
It states single-chip microcontroller and sends the size that the PWM of different duty instructs control laser headlight to export electric current.
2. a kind of realization circuit of program-controlled tabilized current power supply according to claim 1, which is characterized in that the second level amplifier
Circuit, including the first operational amplifier, second operational amplifier, the first operational amplifier non-inverting input terminal and pwm signal
Connection, the second operational amplifier non-inverting input terminal are connect with first operational amplifier output terminal.
3. a kind of realization circuit of program-controlled tabilized current power supply according to claim 2, which is characterized in that the second level amplifier
Circuit, including first resistor, second resistance, one end of the first resistor connect the anti-phase input of first operational amplifier
End, one end of the second resistance connects the inverting input terminal of the second operational amplifier.
4. a kind of realization circuit of program-controlled tabilized current power supply according to claim 1, which is characterized in that the single-chip microcontroller is set
There is Sampling Interface, the Sampling Interface connects the output electric current of the power supply constant current chip, and current value is fed back on described
Position machine.
5. a kind of realization circuit of program-controlled tabilized current power supply according to claim 1, which is characterized in that the power supply constant current
Chip has one the 6th pin, and the 6th pin is connect with the d. c. voltage signal.
6. a kind of realization circuit of program-controlled tabilized current power supply according to claim 1, which is characterized in that the DC voltage
Signal is accurate to 1mV, exports the precision 1mA of electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147848.3U CN209433273U (en) | 2018-12-20 | 2018-12-20 | A kind of realization circuit of program-controlled tabilized current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147848.3U CN209433273U (en) | 2018-12-20 | 2018-12-20 | A kind of realization circuit of program-controlled tabilized current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209433273U true CN209433273U (en) | 2019-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822147848.3U Active CN209433273U (en) | 2018-12-20 | 2018-12-20 | A kind of realization circuit of program-controlled tabilized current power supply |
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| CN (1) | CN209433273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
-
2018
- 2018-12-20 CN CN201822147848.3U patent/CN209433273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
| CN115734428B (en) * | 2022-12-28 | 2024-05-31 | 威海中远海运重工科技有限公司 | Constant-power electrodeless dimming control system |
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