CN209992882U - Output voltage adjustable power control circuit - Google Patents
Output voltage adjustable power control circuit Download PDFInfo
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- CN209992882U CN209992882U CN201920552220.3U CN201920552220U CN209992882U CN 209992882 U CN209992882 U CN 209992882U CN 201920552220 U CN201920552220 U CN 201920552220U CN 209992882 U CN209992882 U CN 209992882U
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Abstract
The utility model discloses a power control circuit with adjustable output voltage, it is including LDO power module, adjustable potentiometer module and: the main control module is connected with the adjustable potentiometer module and is used for setting parameters of the adjustable potentiometer module so as to adjust the resistance value of the resistor end of the adjustable potentiometer module; the resistance end of the adjustable potentiometer module is connected to the LDO power supply module, and the LDO power supply module is used for outputting a voltage signal corresponding to a voltage value according to the resistance value of the resistance end of the adjustable potentiometer module. Compared with the prior art, the utility model discloses need not to change the hardware circuit of current power, only can realize output voltage through simple signal of telecommunication control and adjust, satisfied the application demand betterly, simultaneously, the utility model discloses simple structure, easily realization.
Description
Technical Field
The utility model relates to a power especially relates to a power control circuit with adjustable output voltage.
Background
Programmable power supplies are now widely used in a variety of measurement instrument devices, particularly high precision power meters or programmable power meters and other electronic devices. Referring to fig. 1, a power supply circuit in the prior art is a low noise LDO power supply chip TPS7a87 supporting dual-path adjustable output, which is widely used in power driving modules in electronic devices, and by setting resistors R11 and R21 and a ratio of resistors R12 and R22, dual-path adjustment of the corresponding output voltages VOUT1 and VOUT2 can be achieved. However, when the output voltage needs to be changed, the resistance ratios of R11 to R21, R12 to R22 need to be modified, and thus the circuit can only be used in some power supply application environments with fixed voltage output, and the output voltages of VOUT1 and VOUT2 ends cannot be adjusted because the hardware circuit is fixed, which brings a large application bottleneck.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's not enough, provide a need not to change the hardware circuit of current power, only can realize output voltage regulation's power control circuit through simple signal of telecommunication control.
In order to solve the technical problem, the utility model adopts the following technical scheme.
The utility model provides a power control circuit with adjustable output voltage, it includes LDO power module, adjustable potentiometer module and: the main control module is connected with the adjustable potentiometer module and is used for setting parameters of the adjustable potentiometer module so as to adjust the resistance value of the resistor end of the adjustable potentiometer module; the resistance end of the adjustable potentiometer module is connected to the LDO power supply module, and the LDO power supply module is used for outputting a voltage signal corresponding to a voltage value according to the resistance value of the resistance end of the adjustable potentiometer module.
Preferably, the LDO power supply module includes an LDO power supply chip U1 with model number TPS7a87, and the LDO power supply chip U1 includes a first output terminal Vout1, a first feedback terminal FB1, a second output terminal Vout2, and a second feedback terminal FB 2.
Preferably, the adjustable potentiometer module includes an adjustable potentiometer chip U2 with a chip model of TPL0102, an SDA end and an SCL end of the adjustable potentiometer chip U2 are respectively connected to the main control module, a WA end of the adjustable potentiometer chip U2 is connected to the first feedback end FB1, an HA end of the adjustable potentiometer chip U2 is connected to the first output end Vout1, a WB end of the adjustable potentiometer chip U2 is connected to the second feedback end FB2, and an HB end of the adjustable potentiometer chip U2 is connected to the second output end Vout 2.
Preferably, the main control module comprises an MCU controller U6.
Preferably, the voltage signal and the current signal of the first output terminal Vout1 and the second output terminal Vout2 are respectively transmitted to the MCU controller U6.
Preferably, the first output terminal Vout1 and the second output terminal Vout2 are respectively connected to the ADC1 terminal and the ADC2 terminal of the MCU controller U6.
Preferably, a first current collecting circuit is connected between the first output terminal Vout1 and the ADC3 terminal of the MCU controller U6, and the first current collecting circuit is configured to collect a current signal of the first output terminal Vout1 and transmit the current signal to the ADC3 terminal of the MCU controller U6.
Preferably, a second current collecting circuit is connected between the second output terminal Vout2 and the ADC4 terminal of the MCU controller U6, and the second current collecting circuit is configured to collect a current signal of the second output terminal Vout2 and transmit the current signal to the ADC4 terminal of the MCU controller U6.
Preferably, the first current collection circuit comprises a current sense amplifier chip U4 with a chip model number INA326, and the second current collection circuit comprises a current sense amplifier chip U5 with a chip model number INA 326.
Preferably, the system further comprises an upper computer which is electrically connected with the main control module and used for sending a control instruction to the main control module.
The utility model discloses an among the power control circuit with adjustable output voltage, utilize adjustable potentiometre module does LDO power module provides feedback resistance, and among the practical application, through the electric signal control of host system output the resistance value of adjustable potentiometre module changes, LDO power module adjusts output voltage's size according to this resistance value change thereupon, and then has realized output voltage and has adjusted. Compared with the prior art, the utility model discloses need not to change the hardware circuit of current power, only can realize output voltage through simple signal of telecommunication control and adjust, satisfied the application demand betterly, simultaneously, the utility model discloses simple structure, easily realization.
Drawings
FIG. 1 is a schematic diagram of a prior art power circuit;
fig. 2 is a circuit block diagram of the present invention;
fig. 3 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a power control circuit with adjustable output voltage combines fig. 2 and fig. 3 to show, and it is including LDO power module 1, adjustable potentiometer module 2 and:
the main control module 3 is connected to the adjustable potentiometer module 2 and is used for setting parameters of the adjustable potentiometer module 2 so as to adjust the resistance value of the resistor end of the adjustable potentiometer module 2;
the resistance end of the adjustable potentiometer module 2 is connected to the LDO power module 1, and the LDO power module 1 is configured to output a voltage signal corresponding to a voltage value according to the resistance value of the resistance end of the adjustable potentiometer module 2.
In the circuit, the adjustable potentiometer module 2 is used for providing the feedback resistor for the LDO power supply module 1, in practical application, the electric signal output by the main control module 3 controls the resistance value change of the adjustable potentiometer module 2, and the LDO power supply module 1 adjusts the output voltage according to the resistance value change, so that the output voltage regulation is realized. Compared with the prior art, the utility model discloses need not to change the hardware circuit of current power, only can realize output voltage through simple signal of telecommunication control and adjust, satisfied the application demand betterly, simultaneously, the utility model discloses simple structure, easily realization.
The embodiment has a dual-path voltage output function, specifically, the LDO power module 1 includes an LDO power chip U1 with a model number of TPS7a87, and the LDO power chip U1 includes a first output terminal Vout1, a first feedback terminal FB1, a second output terminal Vout2, and a second feedback terminal FB 2.
Correspondingly, the adjustable potentiometer module 2 needs to provide two-way resistance, specifically, the adjustable potentiometer module 2 includes an adjustable potentiometer chip U2 with a chip model of TPL0102, an SDA end and an SCL end of the adjustable potentiometer chip U2 are respectively connected to the main control module 3, a WA end of the adjustable potentiometer chip U2 is connected to the first feedback end FB1, an HA end of the adjustable potentiometer chip U2 is connected to the first output end Vout1, a WB end of the adjustable potentiometer chip U2 is connected to the second feedback end FB2, and a HB end of the adjustable potentiometer chip U2 is connected to the second output end Vout 2.
As a preferable mode, the main control module 3 includes an MCU controller U6.
In order to realize the voltage and current signal acquisition, in this embodiment, the voltage signal and the current signal of the first output terminal Vout1 and the second output terminal Vout2 are respectively transmitted to the MCU controller U6.
Regarding the voltage signal collecting part, in this embodiment, the first output terminal Vout1 and the second output terminal Vout2 are respectively connected to the ADC1 terminal and the ADC2 terminal of the MCU controller U6.
Regarding the current collection portion, in this embodiment, a first current collection circuit 4 is connected between the first output terminal Vout1 and the ADC3 of the MCU controller U6, and the first current collection circuit 4 is configured to collect a current signal of the first output terminal Vout1 and transmit the current signal to the ADC3 of the MCU controller U6.
Similarly, a second current collecting circuit 5 is connected between the second output terminal Vout2 and the ADC4 terminal of the MCU controller U6, and the second current collecting circuit 5 is configured to collect a current signal of the second output terminal Vout2 and transmit the current signal to the ADC4 terminal of the MCU controller U6.
As a preferred chip type, in this embodiment, the first current collecting circuit 4 includes a current sense amplifier chip U4 with a chip model number INA326, and the second current collecting circuit 5 includes a current sense amplifier chip U5 with a chip model number INA 326.
In order to realize intelligent adjustment and remote control, the present embodiment further includes an upper computer 6 electrically connected to the main control module 3 and configured to send a control instruction to the main control module 3.
The utility model discloses a power control circuit with adjustable output voltage, its theory of operation please see following embodiment:
in a preferred embodiment, an application circuit of a digital control power supply meter supporting two-way adjustable output of an IIC interface is provided, the application circuit removes a resistor R11 and a resistor R21 in the existing circuit and replaces the chip with a chip TPL0102, the chip is an adjustable potentiometer chip supporting the IIC interface, and the chip has two adjustable resistors and has a 256-step resistance range and an adjustment range of 0-500K ohms. In the control process, the MCU controller can simply write in data to the IIC of TPL0102 can modify the voltage size of Vout1 and Vout2, and the mode that this kind of data was write in belongs to the common means among the prior art, the utility model discloses do not do the restriction to specific parameter setting process. Based on the principle, the existing hardware circuit is not used for modification, and the voltage of the Vout1 and the Vout2 can be modified only by sending IIC data, so that the method is convenient and quick. Meanwhile, the actual voltage of the Vout1 and the actual voltage of the Vout2 are read by using the ADC1 and the ADC2 inside the MCU controller, and the power supply can have accurate voltage output by comparing design parameters with the actual output voltage. Meanwhile, the MCU controller can also be used as a transparent transmission tool, upper computer software is designed at the upper computer end of a PC, parameters can be issued to the MCU controller through a USB at any time to modify the voltage output of Vout1 and Vout2, the current detection amplifier chips U4 and U5 with the type of INA326 are added at the same time and are used for monitoring the current in OUT1 and OUT2 in the power chip U1, the ADC1 and the ADC2 of the MCU controller read the voltage parameters of Vout1 and Vout2, the ADC3 and the ADC4 read the current parameters of OUT1 and OUT2 in the power chip U1, the MCU controller can also send the parameters to the PC upper computer for processing, and remote programmable two-way digital control can be realized through the upper computer software at the PC end.
Compared with the prior art, the utility model discloses on current circuit hardware basis, need not to change hardware circuit again and just can realize repairing the voltage size of adjusting Vout1 and Vout2 in the power chip and can monitor the electric current size in OUT1 and OUT2 in the power chip through software, can guarantee to use in electronic equipment, can write in new parameter through upgrading software or software at any time, the function of adjustable voltage output voltage, and the parameter of the output current of control double-circuit power supply, the application is both convenient and reliable. In practical application, the utility model discloses can accomplish under the condition of hardware design, accessible software removes the voltage size of modifying the trimming double-circuit power supply and can monitor the electric current of these two way powers again, calculates and optimizes the adjustment parameter with host computer software for this power supply table can reach the output characteristic of high accuracy, but the wide application is in the test power supply table of various miniwatt devices is used, in addition, the utility model discloses make full use of hardware resources, convenient and fast, support equipment type is extensive, provides more convenient application and more reliable performance for more electronic equipment's power, brings more convenient experience for the product.
The above is only the embodiment of the present invention, and is not intended to limit the present invention, and all modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a power control circuit with adjustable output voltage which characterized in that, including LDO power module (1), adjustable potentiometer module (2) and:
the main control module (3) is connected with the adjustable potentiometer module (2) and is used for setting parameters of the adjustable potentiometer module (2) and further adjusting the resistance value of the resistor end of the adjustable potentiometer module (2);
the resistance end of the adjustable potentiometer module (2) is connected to the LDO power supply module (1), and the LDO power supply module (1) is used for outputting a voltage signal corresponding to a voltage value according to the resistance value of the resistance end of the adjustable potentiometer module (2).
2. The output voltage adjustable power control circuit of claim 1, wherein the LDO power module (1) comprises a LDO power chip U1 with model number TPS7a87, and the LDO power chip U1 comprises a first output terminal Vout1, a first feedback terminal FB1, a second output terminal Vout2, and a second feedback terminal FB 2.
3. The output voltage adjustable power control circuit as claimed in claim 2, wherein the adjustable potentiometer module (2) includes an adjustable potentiometer chip U2 with a chip model number TPL0102, the SDA terminal and the SCL terminal of the adjustable potentiometer chip U2 are respectively connected to the main control module (3), the WA terminal of the adjustable potentiometer chip U2 is connected to the first feedback terminal FB1, the HA terminal of the adjustable potentiometer chip U2 is connected to the first output terminal Vout1, the WB terminal of the adjustable potentiometer chip U2 is connected to the second feedback terminal FB2, and the HB terminal of the adjustable potentiometer chip U2 is connected to the second output terminal Vout 2.
4. The output voltage adjustable power control circuit according to claim 2, wherein the main control module (3) comprises an MCU controller U6.
5. The output voltage adjustable power control circuit as claimed in claim 4, wherein the voltage signal and the current signal of the first output terminal Vout1 and the second output terminal Vout2 are respectively transmitted to the MCU controller U6.
6. The output voltage adjustable power control circuit as claimed in claim 4, wherein the first output terminal Vout1 and the second output terminal Vout2 are connected to the ADC1 terminal and the ADC2 terminal of the MCU controller U6, respectively.
7. The output voltage adjustable power control circuit as claimed in claim 6, wherein a first current collecting circuit (4) is connected between the first output terminal Vout1 and the ADC3 of the MCU controller U6, and the first current collecting circuit (4) is configured to collect the current signal of the first output terminal Vout1 and transmit the current signal to the ADC3 of the MCU controller U6.
8. The output voltage adjustable power control circuit according to claim 7, wherein a second current collecting circuit (5) is connected between the second output terminal Vout2 and the ADC4 of the MCU controller U6, and the second current collecting circuit (5) is configured to collect the current signal of the second output terminal Vout2 and transmit the current signal to the ADC4 of the MCU controller U6.
9. The output voltage adjustable power control circuit as claimed in claim 8, wherein the first current collection circuit (4) comprises a current sense amplifier chip U4 with a chip type INA326, and the second current collection circuit (5) comprises a current sense amplifier chip U5 with a chip type INA 326.
10. The output voltage adjustable power control circuit according to claim 1, further comprising an upper computer (6) electrically connected to the main control module (3) and configured to send a control command to the main control module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552220.3U CN209992882U (en) | 2019-04-22 | 2019-04-22 | Output voltage adjustable power control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552220.3U CN209992882U (en) | 2019-04-22 | 2019-04-22 | Output voltage adjustable power control circuit |
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| CN209992882U true CN209992882U (en) | 2020-01-24 |
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| CN201920552220.3U Active CN209992882U (en) | 2019-04-22 | 2019-04-22 | Output voltage adjustable power control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323948A (en) * | 2020-04-07 | 2020-06-23 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal light valve, liquid crystal light valve and LED lamp |
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2019
- 2019-04-22 CN CN201920552220.3U patent/CN209992882U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323948A (en) * | 2020-04-07 | 2020-06-23 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal light valve, liquid crystal light valve and LED lamp |
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