A programmable power supply device with line loss compensation function

Abstract

The application relates to a programmable power supply device with a line loss compensation function, which comprises a voltage regulation module, a line loss compensation module and a power supply output module; a power supply output end of the power supply output module is used for being connected with a to-be-powered chip, a first input end and a second input end of the line loss compensation module are respectively connected with two ends of the to-be-powered chip, an output end of the line loss compensation module is connected with a first input end of the power supply output module, the line loss compensation module is used for outputting a compensation voltage to the power supply output module according to a difference between an output voltage of the power supply output module and a voltage value of the two ends of the to-be-powered chip; and the voltage regulation module is used for adjusting the output voltage value of the power supply output module. The technical scheme provided by the application can compensate voltage attenuation caused by line loss during large-current output, so that the to-be-powered chip can stably output, and meanwhile, adjustable output voltage can be realized, so that the application scene of the to-be-powered chip with different driving voltages can be applied.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a programmable power supply device with line loss compensation function. Background Technology

[0002] In power supply devices for microLED display chips, a long drive line is often used to connect to the driver terminal of the microLED display chip to enable it to light up. However, since microLED display chips generally require a large drive current, the power supply will experience a significant voltage drop under high current demand after passing through a long drive line, which will lead to unstable display brightness of the microLED display chip. In the current technology, specialized source meters are often used for power supply, but these cannot solve the technical problem of unstable display brightness of microLED display chips. Furthermore, the power supply cost of specialized source meters is high, and their size is very large. Moreover, since different microLED display chips require different drive voltages, the voltage needs to be adjusted at any time, but it is not possible to use a single source meter to achieve output voltage adjustment. Utility Model Content

[0003] To address the problems of existing technologies, this application provides a technical solution for a programmable power supply device with line loss compensation function. Specifically, this application incorporates a voltage regulation module and a line loss compensation module. The line loss compensation module outputs a compensation voltage to the power output module based on the difference between the output voltage of the power output module and the voltage values ​​across the terminals of the chip to be powered. This compensates for voltage attenuation caused by line loss during high-current output, enabling the chip to output power stably. Furthermore, the voltage regulation module adjusts the output voltage value of the power output module, making the output voltage adjustable and suitable for applications with chips requiring different drive voltages. Moreover, the entire programmable power supply device is composed of multiple small components, thereby reducing power supply costs and size.

[0004] This application provides a programmable power supply device with line loss compensation function, including a voltage regulation module, a line loss compensation module and a power output module;

[0005] The power output terminal of the power output module is used to connect to the chip to be powered. The first input terminal and the second input terminal of the line loss compensation module are respectively connected to the two ends of the chip to be powered. The output terminal of the line loss compensation module is connected to the first input terminal of the power output module. The line loss compensation module is used to output a compensation voltage to the power output module according to the difference between the output voltage of the power output module and the voltage values ​​at the two ends of the chip to be powered, so as to compensate the output voltage of the power output module.

[0006] The output terminal of the voltage regulation module is connected to the second input terminal of the power output module, and the voltage regulation module is used to adjust the output voltage value of the power output module.

[0007] Furthermore, the line loss compensation module includes a voltage follower unit, an absolute voltage determination unit, a line loss voltage determination unit, and a first operational amplifier unit;

[0008] The first input terminal and the second input terminal of the voltage follower unit are respectively connected to the two ends of the chip to be powered, the first output terminal of the voltage follower unit is connected to the first input terminal of the absolute voltage determination unit, and the second output terminal of the voltage follower unit is connected to the second input terminal of the absolute voltage determination unit.

[0009] The output terminal of the absolute voltage determination unit is connected to the second input terminal of the line loss voltage determination unit, the first input terminal of the line loss voltage determination unit is connected to the power supply output terminal of the power output module, the output terminal of the line loss voltage determination unit is connected to the input terminal of the first operational amplifier unit, and the output terminal of the first operational amplifier unit is connected to the first input terminal of the power output module.

[0010] Furthermore, the voltage regulation module includes a voltage output control unit, a digital-to-analog conversion unit, and a second operational amplifier unit;

[0011] The output terminal of the voltage output control unit is connected to the input terminal of the digital-to-analog converter, the output terminal of the digital-to-analog converter is connected to the input terminal of the second operational amplifier unit, and the output terminal of the second operational amplifier unit is connected to the second input terminal of the power output module.

[0012] Furthermore, the power output module includes a DC power output unit, an inductor, a first capacitor, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0013] The power input terminal of the DC power output unit is used to connect to the power supply. The output terminal of the DC power output unit is connected to one end of the first resistor, the positive terminal of the first capacitor and the power supply terminal of the chip to be powered through the inductor. The negative terminal of the first capacitor is grounded.

[0014] The other end of the first resistor is connected to the feedback terminal of the DC power supply output unit, one end of the second resistor, one end of the third resistor, and one end of the fourth resistor, respectively. The other end of the third resistor is connected to the output terminal of the line loss compensation module, and the other end of the fourth resistor is connected to the output terminal of the voltage regulation module.

[0015] Furthermore, the first operational amplifier unit includes a fifth resistor, a sixth resistor, and a first operational amplifier;

[0016] One end of the fifth resistor is connected to the output of the line loss voltage determination unit, and the other end of the fifth resistor is connected to the inverting input of the first operational amplifier and one end of the sixth resistor, respectively. The other end of the sixth resistor is connected to the output of the first operational amplifier, and the non-inverting input of the first operational amplifier is used to receive the first preset voltage value.

[0017] Furthermore, the second operational amplifier unit includes a seventh resistor, an eighth resistor, and a second operational amplifier;

[0018] One end of the seventh resistor is connected to the output of the digital-to-analog converter unit, and the other end of the seventh resistor is connected to the inverting input of the second operational amplifier and one end of the eighth resistor, respectively. The other end of the eighth resistor is connected to the output of the second operational amplifier, and the non-inverting input of the second operational amplifier is used to receive the second preset voltage value.

[0019] Furthermore, the power output module also includes a second capacitor, the positive terminal of which is connected to the output terminal of the power supply and the power input terminal of the DC power output unit, respectively, and the negative terminal of the second capacitor is grounded.

[0020] Furthermore, the voltage follower unit includes a voltage follower, the first input terminal and the second input terminal of the voltage follower are respectively connected to the two ends of the chip to be powered, the first output terminal of the voltage follower is connected to the first input terminal of the absolute voltage determination unit, and the second output terminal of the voltage follower is connected to the second input terminal of the absolute voltage determination unit.

[0021] Furthermore, the absolute voltage determination unit includes a first subtractor, the non-inverting input of the first subtractor is connected to the first output of the voltage follower, the inverting input of the first subtractor is connected to the second output of the voltage follower, and the output of the first subtractor is connected to the second input of the line loss voltage determination unit.

[0022] Furthermore, the line loss voltage determination unit includes a second subtractor, the inverting input of the second subtractor is connected to the output of the first subtractor, the non-inverting input of the second subtractor is connected to the first input of the power output module, and the output of the second subtractor is connected to the input of the first operational amplifier unit.

[0023] Implementing this application will have the following beneficial effects:

[0024] This application incorporates a voltage regulation module and a line loss compensation module. The line loss compensation module outputs a compensation voltage to the power output module based on the difference between the output voltage of the power output module and the voltage across the chip to be powered. This compensates for voltage attenuation caused by line loss during high current output, enabling the chip to output power stably. Furthermore, the voltage regulation module adjusts the output voltage of the power output module, making it adjustable and suitable for applications with chips requiring different drive voltages. Moreover, the entire programmable power supply device is composed of multiple small components, reducing power supply cost and size. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0026] Figure 1 A schematic diagram of a programmable power supply device with line loss compensation function provided in an embodiment of this application;

[0027] Figure 2 A circuit diagram corresponding to the programmable power supply device with line loss compensation function provided in the embodiments of this application;

[0028] In the figure, the corresponding labels are as follows: 1-Voltage regulation module; 11-Voltage output control unit; 12-Digital-to-analog conversion unit; 13-Second operational amplifier unit; 131-Seventh resistor; 132-Eighth resistor; 133-Second operational amplifier; 2-Line loss compensation module; 21-Voltage follower unit; 211-Voltage follower; 22-Absolute voltage determination unit; 221-First subtractor; 23-Line loss voltage determination unit; 231-Second subtractor; 24-First operational amplifier unit; 241-Fifth resistor; 242-Sixth resistor; 243-First operational amplifier; 3-Power output module; 31-DC power output unit; 32-Inductor; 33-First capacitor; 34-First resistor; 35-Second resistor; 36-Third resistor; 37-Fourth resistor; 38-Second capacitor; 4-Chip to be powered; Rs-Equivalent line resistance. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that, in this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Hereinafter, embodiments will be described with reference to the accompanying drawings, which are not intended to limit the disclosure described in the claims.

[0032] Please see Figure 1 and Figure 2 The following is combined with Figure 1 and Figure 2 This application provides a detailed description of a programmable power supply device with line loss compensation function, as provided in the embodiments of this application.

[0033] This application provides a programmable power supply device with line loss compensation function, such as... Figure 1 and Figure 2As shown, specifically, the programmable power supply device with line loss compensation function includes a voltage regulation module 1, a line loss compensation module 2, and a power output module 3.

[0034] The power output module 3 has a power output terminal connected to the chip 4 to be powered. The first and second input terminals of the line loss compensation module 2 are connected to the two ends of the chip 4 to be powered, respectively. The output terminal of the line loss compensation module 2 is connected to the first input terminal of the power output module 3. The line loss compensation module 2 is used to output a compensation voltage to the power output module 3 based on the difference between the output voltage of the power output module 3 and the voltage values ​​at the two ends of the chip 4 to be powered, so as to compensate the output voltage of the power output module 3. The output terminal of the voltage regulation module 1 is connected to the second input terminal of the power output module 3. The voltage regulation module 1 is used to adjust the output voltage value of the power output module 3.

[0035] In this embodiment, the chip to be powered 4 is a chip that requires a large driving current. For example, the chip to be powered 4 can be a microLED display chip. It should be noted that the chip to be powered 4 can also be other chips that require a large driving current. No specific limitation is made here. Since there is a long driving line connection between the chip to be powered 4 and the power output module 3, a large voltage drop will be generated on the driving line under the condition of a long driving line and a large driving current requirement. This will cause the display brightness of the microLED display chip to be unstable. Therefore, this application sets a voltage adjustment module 1 so that the line loss compensation module 2 can output a compensation voltage to the power output module 3 according to the difference between the output voltage of the power output module 3 and the voltage values ​​at both ends of the chip to be powered 4. This will compensate for the voltage attenuation caused by line loss when the large current is output, thereby enabling the chip to be powered 4 to output stably.

[0036] Furthermore, this application also includes a voltage adjustment module 1, which allows for the adjustment of the output voltage of the power output module 3, thereby enabling the power output module 3 to have an adjustable output voltage, making it suitable for application scenarios of chips to be powered with different drive voltages.

[0037] In one alternative implementation, such as Figure 2As shown, the power output module 3 includes a DC power output unit 31, an inductor 32, a first capacitor 33, a first resistor 34, a second resistor 35, a third resistor 36, and a fourth resistor 37. The power input terminal of the DC power output unit 31 is connected to a power supply. The output terminal of the DC power output unit 31 is connected via the inductor 32 to one end of the first resistor 34, the positive terminal of the first capacitor 33, and the power supply terminal of the chip 4 to be powered. The negative terminal of the first capacitor 33 is grounded. The other end of the first resistor 34 is connected to the feedback terminal of the DC power output unit 31, one end of the second resistor 35, one end of the third resistor 36, and one end of the fourth resistor 37. The other end of the third resistor 36 is connected to the output terminal of the line loss compensation module 2, and the other end of the fourth resistor 37 is connected to the output terminal of the voltage regulation module 1.

[0038] In this embodiment, the power output module 3 is used to supply power to the chip 4 to be powered. Specifically, the DC power output unit 31 is used to convert one DC voltage into another DC voltage with different voltage, current, or power to output DC power with a corresponding voltage value. For example, Figure 2 As shown, the DC power output unit 31 can be a DC-DC power chip, wherein the SW pin of the DC-DC power chip is an output pin and the FB pin is a feedback input pin. Furthermore, by setting up a power output module 3 including the DC power output unit 31, inductor 32, first capacitor 33, first resistor 34, second resistor 35, third resistor 36 and fourth resistor 37, the power output module 3 can supply power to the chip 4 to be powered, and receive the voltage compensation signal output by the line loss compensation module 2 and the voltage signal output by the voltage regulation module 1.

[0039] Specifically, based on the layout structure of power output module 3, its corresponding circuit parameter formula is as follows:

[0040] V fb / R 35 = (V o -V fb ) / R 34 + (V s1 -V fb ) / R 36 + (V s2 -V fb ) / R 37

[0041] Among them, V fb R is the feedback voltage input to the DC power supply output unit 31. 35 The resistance value of the second resistor is 35V, V o R is the DC voltage output by the DC power supply output unit 31. 34 The resistance value of the first resistor is 34, Vs1 R is the compensation voltage output by line loss compensation module 2. 36 The resistance value of the third resistor is 36V. s2 R is the voltage value output by voltage regulation module 1. 37 This is the resistance value of the fourth resistor, 37.

[0042] When the resistance values ​​of the first resistor 34, the third resistor 36, and the fourth resistor 37 are all equal, the DC voltage output by the DC power supply output unit 31 can be obtained by transforming and rearranging the above formula:

[0043] V o = (3 + R 34 / R 35 )*V fb - V s1 - V s2

[0044] Furthermore, given the feedback voltage input to the DC power output unit 31, the compensation voltage output by the line loss compensation module 2, and the voltage value output by the voltage regulation module 1, the DC voltage output by the DC power output unit 31 can be further determined, thereby enabling the regulation of the DC voltage output by the DC power output unit 31.

[0045] In one alternative implementation, such as Figure 2 As shown, the power output module 3 also includes a second capacitor 38. The positive terminal of the second capacitor 38 is connected to the output terminal of the power supply and the power input terminal of the DC power output unit 31, respectively. The negative terminal of the second capacitor 38 is grounded. Specifically, this application sets the second capacitor 38 to ensure the stability of the output of the power output module 3.

[0046] In one alternative implementation, such as Figure 2 As shown, the line loss compensation module 2 includes a voltage follower unit 21, an absolute voltage determination unit 22, a line loss voltage determination unit 23, and a first operational amplifier unit 24. The first and second input terminals of the voltage follower unit 21 are connected to the two ends of the chip 4 to be powered, respectively. The first output terminal of the voltage follower unit 21 is connected to the first input terminal of the absolute voltage determination unit 22, and the second output terminal of the voltage follower unit 21 is connected to the second input terminal of the absolute voltage determination unit 22. The output terminal of the absolute voltage determination unit 22 is connected to the second input terminal of the line loss voltage determination unit 23. The first input terminal of the line loss voltage determination unit 23 is connected to the power output terminal of the power output module 3. The output terminal of the line loss voltage determination unit 23 is connected to the input terminal of the first operational amplifier unit 24, and the output terminal of the first operational amplifier unit 24 is connected to the first input terminal of the power output module 3.

[0047] In this embodiment, the voltage follower unit 21 has a high input impedance and a low output impedance. Consequently, the current drawn by the voltage follower unit 21 from the signal source is very small, hardly affecting the voltage of the signal source, and does not significantly reduce the output voltage. Therefore, under ideal conditions, the input voltage and output voltage of the voltage follower unit 21 are equal. That is, the voltage follower unit 21 does not change the voltage amplitude of the input signal. Its main purpose is to achieve isolation and improve the stability of the device. The absolute voltage determination unit 22 is used to determine the absolute voltage across the two ends of the chip 4 to be powered. The line loss voltage determination unit 23 is used to determine the difference between the output voltage of the power output module 3 and the voltage value across the two ends of the chip 4 to be powered, so that the first operational amplifier unit 24 can output a compensation voltage to the power output module 3. By setting the voltage follower unit 21, the absolute voltage determination unit 22, the line loss voltage determination unit 23, and the first operational amplifier unit 24, the compensation voltage output by the above devices can be used to compensate for the voltage drop caused by the equivalent resistance Rs of the line, that is, the voltage attenuation caused by line loss when the large current is output, thereby improving the stability of the chip 4 to be powered.

[0048] In one specific implementation, such as Figure 2 As shown, the voltage follower unit 21 includes a voltage follower 211. The first input terminal and the second input terminal of the voltage follower 211 are respectively connected to the two ends of the chip 4 to be powered. The first output terminal of the voltage follower 211 is connected to the first input terminal of the absolute voltage determination unit 22, and the second output terminal of the voltage follower 211 is connected to the second input terminal of the absolute voltage determination unit 22.

[0049] Specifically, such as Figure 2 As shown, the first input terminal of the voltage follower 211 is connected to the power supply terminal of the chip 4 to be powered, the second input terminal of the voltage follower 211 is connected to the ground terminal of the chip 4 to be powered, the first output terminal of the voltage follower 211 is connected to the non-inverting input terminal of the first subtractor 221 in the absolute voltage determination unit 22, and the second output terminal of the voltage follower 211 is connected to the inverting input terminal of the first subtractor 221 in the absolute voltage determination unit 22. Thus, the voltage value across the chip 4 to be powered can be transmitted to the first subtractor 221 through the voltage follower 211, so that the absolute voltage value across the chip 4 to be powered can be obtained by the first subtractor 221.

[0050] In one specific implementation, such as Figure 2 As shown, the absolute voltage determination unit 22 includes a first subtractor 221. The non-inverting input of the first subtractor 221 is connected to the first output of the voltage follower 211, the inverting input of the first subtractor 221 is connected to the second output of the voltage follower 211, and the output of the first subtractor 221 is connected to the second input of the line loss voltage determination unit 23.

[0051] In one specific implementation, such as Figure 2 As shown, the line loss voltage determination unit 23 includes a second subtractor 231. The inverting input terminal of the second subtractor 231 is connected to the output terminal of the first subtractor 221, the non-inverting input terminal of the second subtractor 231 is connected to the first input terminal of the power output module 3, and the output terminal of the second subtractor 231 is connected to the input terminal of the first operational amplifier unit 24.

[0052] Specifically, such as Figure 2 As shown, the output terminal of the first subtractor 221 is connected to the inverting input terminal of the second subtractor 231 in the line loss voltage determination unit 23. Thus, the first subtractor 221 can transmit the absolute voltage value between the two ends of the chip 4 to be powered to the second subtractor 231, so that the second subtractor 231 can determine the difference between the output voltage of the power output module 3 and the voltage value between the two ends of the chip 4 to be powered. In this way, the first operational amplifier unit 24 can feed back the compensation voltage to the power output module 3 to compensate for the voltage attenuation caused by line loss when the large current is output.

[0053] In one specific implementation, such as Figure 2 As shown, the first operational amplifier unit 24 includes a fifth resistor 241, a sixth resistor 242, and a first operational amplifier 243; wherein, one end of the fifth resistor 241 is connected to the output terminal of the line loss voltage determination unit 23, the other end of the fifth resistor 241 is connected to the inverting input terminal of the first operational amplifier 243 and one end of the sixth resistor 242, the other end of the sixth resistor 242 is connected to the output terminal of the first operational amplifier 243, and the non-inverting input terminal of the first operational amplifier 243 is used to receive a first preset voltage value.

[0054] Specifically, the resistance values ​​of the fifth resistor 241 and the sixth resistor 242 are equal, and therefore the compensation voltage output by the line loss compensation module 2 through the first operational amplifier unit 24 is:

[0055] V s1 =2*V ref1 - V drop

[0056] Among them, V s1 To compensate for the voltage, V ref1 The first preset voltage value, V drop This is the line loss voltage.

[0057] Furthermore, the compensation voltage can be fed back to the power output module 3 through the feedback input pin, so that the power output module 3 outputs the compensated voltage value.

[0058] In one alternative implementation, such as Figure 2As shown, the voltage regulation module 1 includes a voltage output control unit 11, a digital-to-analog converter unit 12, and a second operational amplifier unit 13; wherein, the output terminal of the voltage output control unit 11 is connected to the input terminal of the digital-to-analog converter unit 12, the output terminal of the digital-to-analog converter unit 12 is connected to the input terminal of the second operational amplifier unit 13, and the output terminal of the second operational amplifier unit 13 is connected to the second input terminal of the power output module 3.

[0059] Specifically, the voltage output control unit 11 is used to output different voltage values, the digital-to-analog conversion unit 12 is used to convert the digital signal output by the voltage output control unit 11 into an analog signal, and the second operational amplifier unit 13 is used to output a drive voltage value to the power output module 3 to adjust the output voltage value of the power output module 3. Thus, by setting the voltage output control unit 11, the digital-to-analog conversion unit 12 and the second operational amplifier unit 13, the output voltage value of the power output module 3 can be adjusted to accommodate the different drive voltages of the chip 4 to be powered.

[0060] In practical applications, the voltage output control unit 11 can be a microcontroller unit, and the digital-to-analog conversion unit 12 can be a digital-to-analog converter.

[0061] In one specific implementation, such as Figure 2 As shown, the second operational amplifier unit 13 includes a seventh resistor 131, an eighth resistor 132, and a second operational amplifier 133; wherein, one end of the seventh resistor 131 is connected to the output terminal of the digital-to-analog converter unit 12, the other end of the seventh resistor 131 is connected to the inverting input terminal of the second operational amplifier 133 and one end of the eighth resistor 132, the other end of the eighth resistor 132 is connected to the output terminal of the second operational amplifier 133, and the non-inverting input terminal of the second operational amplifier 133 is used to receive a second preset voltage value.

[0062] Specifically, after conversion by the operational circuit composed of the seventh resistor 131, the eighth resistor 132, and the second operational amplifier 133, the driving voltage output by the voltage regulation module 1 through the second operational amplifier 133 is:

[0063] V s2 =(1+R 132 / R 131 )*V ref2 - (R 132 / R 131 )*V dac

[0064] Among them, V s2 For the driving voltage, R 132 R is the resistance value of the eighth resistor, 132. 131 The resistance value of the seventh resistor 131 is V. ref2The second preset voltage value, V dac Given the voltage output of the digital-to-analog converter unit 12, if the resistance values ​​of the seventh resistor 131 and the eighth resistor 132 are equal, then:

[0065] V s2 =2*V ref2 - V dac

[0066] Furthermore, substituting the drive voltage output by the voltage regulation module 1 through the second operational amplifier 133 and the compensation voltage output by the line loss compensation module 2 through the first operational amplifier unit 24 into the DC voltage output by the DC power supply output unit 31, we can obtain:

[0067] V o = (3 + R 34 / R 35 )*V fb -2*V ref1 + V drop -2*V ref2 +V dac

[0068] Specifically, when the line loss voltage changes and the voltage value output by the digital-to-analog conversion unit 12 remains unchanged, the power output module 3 will output a compensated voltage value, thereby compensating for the voltage attenuation caused by line loss during high current output, thus enabling the chip to be powered to output stably. Furthermore, when the voltage regulation module 1 outputs different driving voltages to the power output module 3, the power output module 3 will output an output voltage value corresponding to the driving voltage. That is, the voltage regulation module 1 can adjust the output voltage value of the power output module 3 to realize the programmability of the output voltage of the power output module 3, thus making it suitable for application scenarios of the chip 4 to be powered with different voltage requirements. Furthermore, the entire programmable power supply device is composed of multiple small components, thereby reducing the power supply cost and power supply volume.

[0069] The above embodiments of this application have the following beneficial effects:

[0070] This application incorporates a voltage regulation module and a line loss compensation module. The line loss compensation module outputs a compensation voltage to the power output module based on the difference between the output voltage of the power output module and the voltage across the chip to be powered. This compensates for voltage attenuation caused by line loss during high current output, enabling the chip to output power stably. Furthermore, the voltage regulation module adjusts the output voltage of the power output module, making it adjustable and suitable for applications with chips requiring different drive voltages. Moreover, the entire programmable power supply device is composed of multiple small components, reducing power supply cost and size.

[0071] The structure shown in this embodiment is only a partial structure related to the solution of this application and does not constitute a limitation on the device to which the solution of this application is applied. Specific devices may include more or fewer components than shown, or combinations of certain components, or arrangements of different components. It should be understood that the methods, apparatuses, etc., disclosed in this embodiment can be implemented in other ways.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A programmable power supply device with line loss compensation function, characterized in that, It includes a voltage regulation module (1), a line loss compensation module (2), and a power output module (3); The power output terminal of the power output module (3) is used to connect to the chip (4) to be powered. The first input terminal and the second input terminal of the line loss compensation module (2) are respectively connected to the two ends of the chip (4) to be powered. The output terminal of the line loss compensation module (2) is connected to the first input terminal of the power output module (3). The line loss compensation module (2) is used to output a compensation voltage to the power output module (3) according to the difference between the output voltage of the power output module (3) and the voltage values ​​at both ends of the chip (4) to be powered, so as to perform voltage compensation on the output voltage of the power output module (3). The output terminal of the voltage regulation module (1) is connected to the second input terminal of the power output module (3), and the voltage regulation module (1) is used to adjust the output voltage value of the power output module (3).

2. The programmable power supply device according to claim 1, characterized in that, The line loss compensation module (2) includes a voltage follower unit (21), an absolute voltage determination unit (22), a line loss voltage determination unit (23), and a first operational amplifier unit (24); The first input terminal and the second input terminal of the voltage follower unit (21) are respectively connected to the two ends of the chip to be powered (4), the first output terminal of the voltage follower unit (21) is connected to the first input terminal of the absolute voltage determination unit (22), and the second output terminal of the voltage follower unit (21) is connected to the second input terminal of the absolute voltage determination unit (22). The output terminal of the absolute voltage determination unit (22) is connected to the second input terminal of the line loss voltage determination unit (23), the first input terminal of the line loss voltage determination unit (23) is connected to the power supply output terminal of the power output module (3), the output terminal of the line loss voltage determination unit (23) is connected to the input terminal of the first operational amplifier unit (24), and the output terminal of the first operational amplifier unit (24) is connected to the first input terminal of the power output module (3).

3. The programmable power supply device according to claim 1, characterized in that, The voltage regulation module (1) includes a voltage output control unit (11), a digital-to-analog conversion unit (12), and a second operational amplifier unit (13); The output terminal of the voltage output control unit (11) is connected to the input terminal of the digital-to-analog converter (12), the output terminal of the digital-to-analog converter (12) is connected to the input terminal of the second operational amplifier unit (13), and the output terminal of the second operational amplifier unit (13) is connected to the second input terminal of the power output module (3).

4. The programmable power supply device according to claim 1, characterized in that, The power output module (3) includes a DC power output unit (31), an inductor (32), a first capacitor (33), a first resistor (34), a second resistor (35), a third resistor (36), and a fourth resistor (37); The power input terminal of the DC power output unit (31) is used to connect to the power supply. The output terminal of the DC power output unit (31) is connected to one end of the first resistor (34), the positive terminal of the first capacitor (33) and the power supply terminal of the chip to be powered (4) through the inductor (32). The negative terminal of the first capacitor (33) is grounded. The other end of the first resistor (34) is connected to the feedback terminal of the DC power output unit (31), one end of the second resistor (35), one end of the third resistor (36) and one end of the fourth resistor (37), respectively. The other end of the third resistor (36) is connected to the output terminal of the line loss compensation module (2), and the other end of the fourth resistor (37) is connected to the output terminal of the voltage regulation module (1).

5. The programmable power supply device according to claim 2, characterized in that, The first operational amplifier unit (24) includes a fifth resistor (241), a sixth resistor (242), and a first operational amplifier (243); One end of the fifth resistor (241) is connected to the output terminal of the line loss voltage determination unit (23), and the other end of the fifth resistor (241) is connected to the inverting input terminal of the first operational amplifier (243) and one end of the sixth resistor (242), respectively. The other end of the sixth resistor (242) is connected to the output terminal of the first operational amplifier (243), and the non-inverting input terminal of the first operational amplifier (243) is used to receive the first preset voltage value.

6. The programmable power supply device according to claim 3, characterized in that, The second operational amplifier unit (13) includes a seventh resistor (131), an eighth resistor (132), and a second operational amplifier (133); One end of the seventh resistor (131) is connected to the output terminal of the digital-to-analog converter (12), and the other end of the seventh resistor (131) is connected to the inverting input terminal of the second operational amplifier (133) and one end of the eighth resistor (132), respectively. The other end of the eighth resistor (132) is connected to the output terminal of the second operational amplifier (133), and the non-inverting input terminal of the second operational amplifier (133) is used to receive the second preset voltage value.

7. The programmable power supply device according to claim 4, characterized in that, The power output module (3) further includes a second capacitor (38), the positive terminal of which is connected to the output terminal of the power supply and the power input terminal of the DC power output unit (31), and the negative terminal of which is grounded.

8. The programmable power supply device according to claim 2, characterized in that, The voltage follower unit (21) includes a voltage follower (211), the first input terminal and the second input terminal of the voltage follower (211) are respectively connected to the two ends of the chip to be powered (4), the first output terminal of the voltage follower (211) is connected to the first input terminal of the absolute voltage determination unit (22), and the second output terminal of the voltage follower (211) is connected to the second input terminal of the absolute voltage determination unit (22).

9. The programmable power supply device according to claim 8, characterized in that, The absolute voltage determination unit (22) includes a first subtractor (221), the non-inverting input of the first subtractor (221) is connected to the first output of the voltage follower (211), the inverting input of the first subtractor (221) is connected to the second output of the voltage follower (211), and the output of the first subtractor (221) is connected to the second input of the line loss voltage determination unit (23).

10. The programmable power supply device according to claim 9, characterized in that, The line loss voltage determination unit (23) includes a second subtractor (231), the inverting input terminal of the second subtractor (231) is connected to the output terminal of the first subtractor (221), the non-inverting input terminal of the second subtractor (231) is connected to the first input terminal of the power output module (3), and the output terminal of the second subtractor (231) is connected to the input terminal of the first operational amplifier unit (24).

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