CN211087036U - Constant-current power supply board card - Google Patents
Constant-current power supply board card Download PDFInfo
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- CN211087036U CN211087036U CN201922006450.2U CN201922006450U CN211087036U CN 211087036 U CN211087036 U CN 211087036U CN 201922006450 U CN201922006450 U CN 201922006450U CN 211087036 U CN211087036 U CN 211087036U
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Abstract
The utility model discloses a constant current power supply board card, which comprises an MCU control unit, a constant current power supply unit and a constant current output unit; the MCU control unit is electrically connected with the constant current power supply unit, and the constant current output unit is electrically connected with the output end of the constant current power supply unit. The constant current power supply unit performs accurate constant current control management on voltage and current, so that the obtained constant current is large in output and high in accuracy; meanwhile, the constant current power supply unit outputs the constant current and the constant current voltage to the load equipment through the constant current output unit, so that the voltage and the current of the constant current load equipment can be conveniently measured.
Description
Technical Field
The utility model relates to the technical field of circuits, specifically, the utility model relates to a constant current power supply integrated circuit board.
Background
Projectors have become office products that are essential to modern business people, and laser projectors are favored because they consume less power, project larger images (up to 100 inches), and do not require focusing, as compared to existing digital optical processors or silicon photonics.
The laser projector comprises a laser source, an optical modulator, an optical system, an optical scanner, an image controller and a power circuit, wherein when the traditional power circuit supplies voltage and current required by the laser source, on one hand, the voltage and current fluctuation of the power circuit can cause the laser source to generate a flickering phenomenon, certain influence is generated on the projection effect, and certain damage can be caused to the eyes of a user; on the other hand, most of the traditional power supply circuits can only adjust the current within the range of dozens of mA to hundreds of mA in current control, and the precision is poor; in the voltage control, the voltage can be controlled only in the range of less than 10V, the precision is low, and the projector is easy to damage during long-term low-voltage operation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a constant current power supply integrated circuit board, the constant current output that this constant current power supply integrated circuit board obtained is great, and the precision is high moreover.
According to the utility model discloses an aspect provides a constant current power supply integrated circuit board, include:
the device comprises an MCU control unit, a constant current power supply unit and a constant current output unit, wherein the constant current power supply unit comprises a voltage limiting circuit, a voltage detection circuit and a current detection circuit;
the MCU control unit is electrically connected with the constant current power supply unit, and the constant current output unit is electrically connected with the output end of the constant current power supply unit.
Optionally, the output end of the MCU control unit includes a first output end and a second output end, a first DA module unit is connected between the first output end and the constant current power supply unit, a second DA module unit is connected between the second output end and the constant current power supply unit, the input end of the MCU control unit includes a first input end, and the first input end is electrically connected with the constant current power supply unit through a first AD module unit.
Optionally, the constant current power supply unit includes a power amplifying unit, a conditioning circuit unit, a power MOS unit, a feedback circuit unit, a voltage and current sampling unit, and a voltage and current collecting unit;
the input end of the power amplification unit is electrically connected with the output end of the first DA module unit, the input end of the power MOS unit comprises a third input end and a fourth input end, the third input end is electrically connected with the output end of the power amplification unit, the fourth input end is electrically connected with the output end of the conditioning circuit unit, the input end of the conditioning circuit unit comprises a fifth input end and a sixth input end, the fifth input end is electrically connected with the second DA module unit, the sixth input end is electrically connected with the output end of the feedback circuit unit, the input end of the voltage and current sampling unit is electrically connected with the output end of the power MOS unit, the output end of the voltage and current sampling unit comprises a third output end, a fourth output end and a fifth output end, and the third output end is electrically connected with the input end of the feedback circuit unit, the fourth output end is electrically connected with the first AD module unit, the fifth output end is electrically connected with the input end of the voltage and current acquisition unit, and the voltage and current acquisition unit is electrically connected with the input end of the constant current output unit.
Optionally, the constant current power supply board card further comprises a PD measurement unit, the PD measurement unit is electrically connected with the MCU control unit through a second AD module unit, the PD measurement unit comprises a PD current sampling unit and an operational amplifier conditioning circuit unit, an output end of the PD current sampling unit is electrically connected with an input end of the operational amplifier conditioning circuit unit, and an output end of the operational amplifier conditioning circuit unit is electrically connected with an input end of the second AD module unit;
the input end of the MCU control unit further comprises a second input end, and the output end of the second AD module unit is electrically connected with the second input end of the MCU control unit.
Optionally, the current collected by the voltage and current collecting unit is in a range of 0-1A.
Optionally, the voltage collected by the voltage and current collecting unit is in a range of 1-15V.
Optionally, a voltage limiting circuit is disposed in the power amplifying unit.
Optionally, the PD measurement units are arranged in multiple groups, including one, two, three, four, five or six groups of PD measurement units.
Optionally, the measurement accuracy of the PD measurement unit is of the order of μ a.
Optionally, the constant current power supply unit and the constant current output unit are mutually matched to form an integral unit, the integral unit is provided in multiple groups including one group, two groups, three groups, four groups, five groups or six groups, and each constant current power supply unit of the integral unit is connected with the MCU control unit.
Optionally, the constant current power supply board card further comprises a storage unit, the storage unit is electrically connected with the MCU control unit, and the storage unit is configured to store the setting data of the constant current power supply board card.
Optionally, the constant current power supply board card further comprises a USB unit, the USB unit is electrically connected with the MCU control unit, and the USB unit is configured to establish data communication between the MCU control unit and an external device.
The utility model discloses a constant current power supply board card includes MCU the control unit, constant current power supply unit and constant current output unit; the MCU control unit is electrically connected with the constant current power supply unit, and the constant current output unit is electrically connected with the output end of the constant current power supply unit. The constant current power supply unit performs accurate constant current control management on voltage and current, so that the obtained constant current is large in output and high in accuracy; meanwhile, the constant current power supply unit outputs the constant current and the constant current voltage to the load equipment through the constant current output unit, so that the voltage and the current of the constant current load equipment can be conveniently measured.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic circuit diagram of a constant current power supply board of the present invention;
FIG. 2 is a schematic circuit diagram of the MCU control unit and the constant current power supply unit of the constant current power supply board card of the present invention;
fig. 3 is the circuit schematic diagram of the MCU control unit and the PD measurement unit of the constant current power supply board card of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, the utility model discloses a constant current power supply integrated circuit board, include:
the constant current power supply unit 500 comprises an MCU control unit 100, a constant current power supply unit 500 and a constant current output unit 600, wherein the constant current power supply unit 500 comprises a voltage limiting circuit 510, a voltage detection circuit 520 and a current detection circuit 530; the MCU control unit 100 is electrically connected to the constant current power supply unit 500, and the constant current output unit 600 is electrically connected to an output terminal of the constant current power supply unit 500.
The MCU control unit 100 transmits control signals of voltage and current to the constant current power supply unit 500, and the constant current power supply unit 500 controls the voltage and current within a constant range through the limit voltage circuit 510, the voltage detection circuit 520, and the current detection circuit 530, and transmits the same to the laser light source of the laser projector through the constant current output unit 600, and finally lights the laser head for laser projection.
Referring to fig. 2, optionally, the output end of the MCU control unit 100 includes a first output end and a second output end, a first DA module unit 501 is electrically connected between the first output end and the constant current power supply unit 500, a second DA module unit 503 is electrically connected between the second output end and the constant current power supply unit 500, the input end of the MCU control unit 100 includes a first input end, and the first input end is electrically connected to the constant current power supply unit 500 through a first AD module unit 508.
The first DA module unit 501 and the second DA module unit 503 can quickly convert the digital signal sent by the MCU control unit 100 into an analog signal for output, so as to facilitate signal reception and processing of the constant current power supply unit 500; meanwhile, the first AD module unit may rapidly convert the analog signal sent by the constant current power supply unit 500 into a digital signal and output the digital signal to the MCU control unit 100, thereby completing rapid conversion between signals.
Referring to fig. 2, optionally, the constant current power supply unit 500 includes a power amplifying unit 502, a conditioning circuit unit 504, a power MOS unit 505, a feedback circuit unit 506, a voltage and current sampling unit 507, and a voltage and current collecting unit 509; the input end of the power amplifying unit 502 is electrically connected to the output end of the first DA module unit 501, the input end of the power MOS unit 505 includes a third input end and a fourth input end, the third input end is electrically connected to the output end of the power amplifying unit 502, the fourth input end is electrically connected to the output end of the conditioning circuit unit 504, the input end of the conditioning circuit unit 504 includes a fifth input end and a sixth input end, the fifth input end is electrically connected to the second DA module unit 503, the sixth input end is electrically connected to the output end of the feedback circuit unit 506, the input end of the voltage and current sampling unit 507 is electrically connected to the output end of the power MOS unit 505, the output end of the voltage and current sampling unit 507 includes a third output end, a fourth output end and a fifth output end, and the third output end is electrically connected to the input end of the feedback circuit unit 506, the fourth output end is electrically connected to the first AD module unit 508, the fifth output end is electrically connected to the input end of the voltage and current collecting unit 509, and the voltage and current collecting unit 509 is electrically connected to the input end of the constant current output unit 600.
The power amplification unit 502 is provided with a voltage limiting circuit, and can send a signal for limiting the voltage of the conditioning circuit unit 504 while amplifying a signal output by the first DA module unit 501, the conditioning circuit unit 504 is an external input circuit and can provide initial voltage and current for the whole power board, the power MOS unit 505 can control the on-off state of the circuit, when the voltage provided by the conditioning circuit unit 504 meets the requirement of the power amplification unit 502 on voltage limitation, the power MOS unit 505 turns on the circuit, and if not, the circuit is turned off. The voltage and current sampling unit 507 is configured to sample the voltage and current transmitted by the power MOS unit 505, the voltage and current sampling unit 507 is provided with a determination unit, if the voltage and current transmitted by the power MOS unit 505 meet an external output requirement after being determined by the determination unit, the voltage and current are output to the voltage and current acquisition unit 509, and the voltage and current acquisition unit 509 finally outputs the voltage and current to the constant current output unit 600; if the output requirements are not met, the sampling voltage and current signals are transmitted to the feedback circuit unit 506, and the feedback circuit unit 506 feeds the voltage and current signals back to the conditioning circuit unit 504 to be adjusted again until the output requirements are met.
The constant current power supply unit 500 performs accurate constant current control management on the voltage and current output by the regulating circuit unit 504, so that the obtained constant current has large output and high accuracy; meanwhile, the obtained constant-current voltage is adjustable in output, large in adjustment range and high in adjustment precision; more importantly, the constant current power supply unit 500 outputs the constant current and the constant voltage to the load device through the constant current output unit 600, so that the voltage and the current of the constant current load device can be conveniently measured, and the measurement precision is high.
Optionally, the constant current power supply unit 500 and the constant current output unit 600 cooperate with each other to form an integral unit, and the integral unit is provided in multiple groups, including one group, two groups, three groups, four groups, five groups or six groups, or more, as long as the load upper limit of the MCU control unit 100 is not exceeded. The multiple groups of constant current power supply units 500 are all electrically connected with the MCU control unit 100, the MCU control unit 100 can send control signals to the multiple independent constant current power supply units 500, and the sending speed is high and the precision is high.
Optionally, the MCU control unit 500 is an STM32F103C8 type single chip microcomputer. The STM32F103C8 type single chip microcomputer is a 32-bit microcontroller based on an ARM Cortex-M kernel STM32 series, has strong signal processing capacity and can be well applied to a circuit system with a multi-path constant current power supply and constant current output.
Referring to fig. 3, optionally, the constant current power supply board card of the present invention further includes a PD measurement unit 400, the PD measurement unit 400 is electrically connected to the MCU control unit 100 through a second AD module unit 401, the PD measurement unit 400 includes a PD current sampling unit 403 and an operational amplifier conditioning circuit unit 402, an output end of the PD current sampling unit 403 is electrically connected to an input end of the operational amplifier conditioning circuit unit 402, and an output end of the operational amplifier conditioning circuit unit 402 is connected to an input end of the second AD module unit 401; the input end of the MCU control unit 100 further includes a second input end, and the output end of the second AD module unit 401 is electrically connected to the second input end of the MCU control unit 100. The PD measurement unit 400 is configured to measure PD current, and the measurement accuracy of the PD measurement unit 400 is of the order of μ a.
The PD measuring unit 400 can accurately measure the PD current of the backlight detector by responding to the laser light generated from the laser light source of the laser projector through the backlight detector connected thereto. Firstly, the PD current sampling unit 403 may rapidly sample the PD current of the backlight detector, and then send the sampling signal to the operational amplifier conditioning circuit unit 402, the operational amplifier conditioning circuit unit 402 amplifies and adjusts the sampling signal and then transmits the sampling signal to the second AD module unit 401, and the second AD module unit 401 converts the analog sampling signal into a digital sampling signal and finally sends the digital sampling signal to the MCU control unit 100.
Moreover, the measurement accuracy of the conventional PD measurement unit can only reach 100 μ a, if the response current of the backlight detector is very small, at several μ a or tens of μ a, the measurement of the conventional PD measurement unit will have a very large error, and the measurement accuracy of the PD measurement unit 400 of the present invention can reach μ a level, and can accurately measure the response current of the backlight detector at μ a level.
Optionally, the PD measurement unit 400 is configured in multiple groups, including one group, two groups, three groups, four groups, five groups, or six groups, or more, as long as the upper load limit of the MCU control unit 100 is not exceeded. The multiple groups of PD measurement units 400 are all electrically connected to the MCU control unit 100, and the MCU control unit 100 can receive signals from multiple independent PD measurement units 400, and has high receiving speed and high accuracy.
Optionally, the constant current collected by the voltage and current collecting unit 509 ranges from 0 to 1A. The constant current which is widely used for the laser projection power supply at present can only be adjusted within the range of dozens of mA to hundreds of mA, and the precision is poor; the utility model discloses the constant current of constant current power supply integrated circuit board can be controlled in 0-1A's scope, and for traditional constant current control, not only control range is bigger, and the precision is higher moreover.
Optionally, the constant current voltage collected by the voltage and current collecting unit 509 ranges from 1V to 15V. The constant current voltage widely used for the laser projection power supply at present can only be controlled in a range below 10V generally, and the precision is low. The utility model discloses constant current power supply integrated circuit board's constant current voltage can control at 1-15V's scope, and for traditional constant current voltage control, not only control range is bigger, and the precision is higher moreover.
Optionally, the utility model discloses a constant current power supply integrated circuit board still includes memory cell 300, memory cell 300 can be flash memory or hard disk, memory cell 300 with MCU the control unit 100 electricity is connected, memory cell 300 is configured to preserve the setting data of constant current power supply integrated circuit board, including initial setting data and the operation data in the operation process.
Optionally, the utility model discloses a constant current power supply integrated circuit board still includes USB unit 200, USB unit 200 with MCU the control unit 100 electricity is connected, USB unit 200 is configured to establish MCU the data communication of control unit 100 with external equipment. The USB unit 200 may conveniently and quickly transmit the data information of the MCU control unit 200 to an external device.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A constant current power supply board card is characterized by comprising:
the device comprises an MCU control unit, a constant current power supply unit and a constant current output unit, wherein the constant current power supply unit comprises a voltage limiting circuit, a voltage detection circuit and a current detection circuit;
the MCU control unit is electrically connected with the constant current power supply unit, and the constant current output unit is electrically connected with the output end of the constant current power supply unit.
2. The constant-current power supply board card of claim 1, wherein the output end of the MCU control unit comprises a first output end and a second output end, a first DA module unit is connected between the first output end and the constant-current power supply unit, a second DA module unit is connected between the second output end and the constant-current power supply unit, the input end of the MCU control unit comprises a first input end, and the first input end is electrically connected with the constant-current power supply unit through a first AD module unit.
3. The constant-current power supply board card of claim 2, wherein the constant-current power supply unit comprises a power amplification unit, a conditioning circuit unit, a power MOS unit, a feedback circuit unit, a voltage and current sampling unit and a voltage and current acquisition unit;
the input end of the power amplification unit is electrically connected with the output end of the first DA module unit, the input end of the power MOS unit comprises a third input end and a fourth input end, the third input end is electrically connected with the output end of the power amplification unit, the fourth input end is electrically connected with the output end of the conditioning circuit unit, the input end of the conditioning circuit unit comprises a fifth input end and a sixth input end, the fifth input end is electrically connected with the second DA module unit, the sixth input end is electrically connected with the output end of the feedback circuit unit, the input end of the voltage and current sampling unit is electrically connected with the output end of the power MOS unit, the output end of the voltage and current sampling unit comprises a third output end, a fourth output end and a fifth output end, and the third output end is electrically connected with the input end of the feedback circuit unit, the fourth output end is electrically connected with the first AD module unit, the fifth output end is electrically connected with the input end of the voltage and current acquisition unit, and the voltage and current acquisition unit is electrically connected with the input end of the constant current output unit.
4. The constant-current power supply board card of claim 2, further comprising a PD measurement unit, wherein the PD measurement unit is electrically connected with the MCU control unit through a second AD module unit, the PD measurement unit comprises a PD current sampling unit and an operational amplifier conditioning circuit unit, an output end of the PD current sampling unit is electrically connected with an input end of the operational amplifier conditioning circuit unit, and an output end of the operational amplifier conditioning circuit unit is electrically connected with an input end of the second AD module unit;
the input end of the MCU control unit further comprises a second input end, and the output end of the second AD module unit is electrically connected with the second input end of the MCU control unit.
5. The constant-current power supply board card of claim 3, wherein the current collected by the voltage and current collecting unit is in a range of 0-1A.
6. The constant-current power supply board card of claim 3, wherein the voltage range collected by the voltage and current collecting unit is 1-15V.
7. The constant-current power supply board card of claim 3, wherein a voltage limiting circuit is arranged in the power amplification unit.
8. The constant-current power supply board card of claim 4, wherein the PD measuring units are arranged in multiple groups, including one group, two groups, three groups, four groups, five groups or six groups of PD measuring units.
9. The constant-current power supply board card of claim 4, wherein the measurement accuracy of the PD measurement unit is of the μ A level.
10. The constant-current power supply board card of claim 1, wherein the constant-current power supply units are arranged in multiple groups, including one group, two groups, three groups, four groups, five groups or six groups, each constant-current power supply unit is correspondingly electrically connected with one constant-current output unit, and the constant-current power supply units are all connected with the MCU control unit.
11. The constant-current power supply board card of claim 1, further comprising a storage unit, wherein the storage unit is electrically connected with the MCU control unit, and the storage unit is configured to store setting data of the constant-current power supply board card.
12. The constant-current power supply board card of claim 1, further comprising a USB unit, wherein the USB unit is electrically connected to the MCU control unit, and the USB unit is configured to establish data communication between the MCU control unit and an external device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006450.2U CN211087036U (en) | 2019-11-19 | 2019-11-19 | Constant-current power supply board card |
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| CN201922006450.2U CN211087036U (en) | 2019-11-19 | 2019-11-19 | Constant-current power supply board card |
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| CN211087036U true CN211087036U (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030769A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司电力调度控制中心 | Wisdom power integrated circuit board with monitoring function |
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2019
- 2019-11-19 CN CN201922006450.2U patent/CN211087036U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030769A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司电力调度控制中心 | Wisdom power integrated circuit board with monitoring function |
| CN113030769B (en) * | 2021-03-10 | 2024-04-19 | 广东电网有限责任公司电力调度控制中心 | Intelligent power board card with monitoring function |
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Effective date of registration: 20200729 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 266104 Laoshan Qingdao District North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |