A power supply system and chip power supply test equipment

Abstract

The application describes a power supply system, comprising: a voltage control module, a voltage regulation module, a current detection module, a communication control module; the voltage control module outputs a feedback voltage to the voltage regulation module; the voltage control module also receives voltage configuration parameters sent by the communication control module to form a stable voltage required by a load; the voltage regulation module provides a stable voltage for the load based on the feedback voltage; the circuit intersection of the voltage control module, the voltage regulation module and the load is a voltage stabilization node, and a stable voltage is provided based on the voltage stabilization node during the working process of the power supply system; the current detection module is used for detecting at least the current of the load; wherein the current detection module comprises a voltage input end and a detection end, the voltage input end is connected to the voltage regulation module, and the detection end is connected to the load through the voltage stabilization node. The power supply system provided by the application can reduce the voltage drop generated by the conventional current detection method, so that the voltage remains stable during the current detection process of the chip.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power supply, in particular to a power supply system and a chip power supply test device comprising the same. BACKGROUND

[0002] With the rapid development of electronic technology, the demand for chips is increasing, and at present, a separate voltage stabilizing power supply can be used to supply power to the chip in the market.

[0003] In the process of testing a large number of chips, a direct current voltage stabilizing power supply and a current measuring instrument are usually used to realize the functions of chip power supply voltage regulation and current measurement. However, this scheme has the following disadvantages: when the number of tested chips increases, the number of required direct current voltage stabilizing power supplies and current measuring instruments increases, resulting in an increase in cost and space; the voltage regulation mode of the direct current voltage stabilizing power supply and the range selection of the current measuring instrument are usually manually adjusted; it is not conducive to mass production; and the voltage attenuation problem caused by the increase of the current measuring instrument in the circuit.

[0004] Therefore, how to provide stable power supply in the design, how to provide a more dynamic load current range, and how to reduce the number of test hardware in the chip current detection process have become key problems faced by designers. SUMMARY

[0005] Therefore, the present application provides a power supply system, comprising: a voltage control module, a voltage stabilizing regulation module, a current detection module, and a communication control module; the voltage control module outputs a feedback voltage to the voltage stabilizing regulation module; the voltage control module also receives voltage configuration parameters sent by the communication control module to form a stable voltage required by a load; the voltage stabilizing regulation module provides a stable voltage for the load based on the feedback voltage; the circuit intersection of the voltage control module, the voltage stabilizing regulation module, and the load is a voltage stabilizing node, and a stable voltage is provided based on the voltage stabilizing node during the working process of the power supply system; the current detection module is used to detect at least the current of the load; wherein the current detection module comprises a first passage end and a second passage end, the first passage end is connected to the voltage stabilizing regulation module, and the second passage end is connected to the load through the voltage stabilizing node.

[0006] Optionally, the communication control module comprises a communication module and an upper computer that communicate with each other; the communication module is used to transmit voltage configuration parameters output by the upper computer to the voltage control module and transmit current range control parameters output by the upper computer to the current detection module, and the communication module is also used to send digital signals fed back by the current detection module to the upper computer; based on the voltage configuration parameters and the digital signals fed back by the current detection module, the upper computer calculates the current value of the load.

[0007] Optionally, the voltage stabilizing module comprises a voltage stabilizer, the voltage stabilizer comprises an input pin, an output pin and a feedback pin; the input pin receives a fixed voltage; the feedback pin is connected to the voltage control module and receives a feedback voltage; the voltage stabilizer further comprises a first reference voltage provided; the output pin is connected to the first path end of the current detection module and outputs a first stable voltage based on the feedback voltage output by the voltage control module, the first reference voltage and the fixed voltage.

[0008] Optionally, the voltage stabilizer comprises an error amplifier and an adjusting tube; and / or, the voltage stabilizing module further comprises a resistance-capacitance device.

[0009] Optionally, the fixed voltage is greater than the first stable voltage.

[0010] Optionally, the current detection module comprises an analog-to-digital converter and at least two control detection paths in parallel; the current detection module switches the current detection range by controlling the conduction and shutdown of the field effect tube of the control detection path after receiving the current range control parameter output by the communication control module; the analog-to-digital converter quantizes the analog signal into a digital signal and feeds it back to the communication control module.

[0011] Optionally, the at least two control detection paths in parallel comprise a first control detection path and a second control detection path, the first control detection path and the second control detection path are both connected in series with the voltage stabilizing module and the load; wherein the first control detection path comprises a first switching transistor and a first sampling resistor (R1), the second control detection path comprises a second switching transistor and a second sampling resistor (R2), the current detection module switches the current detection range by controlling the opening and closing of the first switching transistor and the second switching transistor after receiving the current range control parameter.

[0012] Optionally, the voltage of the voltage stabilizing node is less than the first stable voltage.

[0013] Optionally, the current detection module communicates with the communication module through an I2C bus; and / or, the voltage control module communicates with the communication module through an I2C bus.

[0014] Optionally, the voltage control module comprises a digital-to-analog converter, the digital-to-analog converter is used to receive the voltage configuration parameter sent by the communication control module and output an adjusting voltage (VDAC) based on the voltage configuration parameter, so as to form a stable voltage based on the adjusting voltage.

[0015] Optionally, the voltage control module further comprises a resistance network, a first end of the resistance network is connected to the output end of the adjusting voltage of the digital-to-analog converter, a second end of the resistance network outputs the feedback voltage, a third end of the resistance network is connected to the load, and a fourth end of the resistance network is connected to the adjusting reference voltage.

[0016] Optionally, the resistance network comprises a third sampling resistor (R3), a fourth sampling resistor (R4) and a fifth sampling resistor (R5), one end of each of the third sampling resistor, the fourth sampling resistor and the fifth sampling resistor is connected to the voltage stabilizing and adjusting module and serves as an output end of the feedback voltage, the other end of the third sampling resistor is connected to the load, the other end of the fourth sampling resistor is connected to the adjusting reference voltage, and the other end of the fifth sampling resistor is connected to an output end of the adjusting voltage of the digital-to-analog converter.

[0017] Optionally, the power supply system satisfies the formula:

[0018]

[0019] VDAC is the adjusting voltage output by the voltage control module, VFB is the feedback voltage provided by the voltage control module, VOUT2 is the voltage of the voltage stabilizing node, VREF2 is the adjusting reference voltage, R3 is the third sampling resistor, R4 is the fourth sampling resistor, and R5 is the fifth sampling resistor.

[0020] The application further discloses a chip power supply testing device comprising the power supply system, wherein the chip power supply testing device is used for supplying power to the chip; and / or the chip power supply testing device is used for current detection of the chip.

[0021] Compared with the prior art, the application has at least one of the following outstanding advantages:

[0022] The power supply system provided by the application can alleviate the voltage drop caused by the conventional current detection mode, so that the voltage is always stable during the process of supplying power to the chip and the process of current detection of the chip; the output voltage can be quickly controlled through the communication control module, which is suitable for flexible control of the power supply voltage and current measurement in chip testing; meanwhile, the number of current detection instruments is reduced, which is suitable for large-scale chip testing schemes. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a module connection schematic diagram of a power supply system provided by the application;

[0024] Figure 2 is a module connection schematic diagram of another power supply system provided by the application;

[0025] Figure 3 is a partial structure schematic diagram of a voltage stabilizing and adjusting module provided by the application;

[0026] Figure 4 is a specific structure schematic diagram of a power supply system provided by the application. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, the present application will be further described below with reference to the accompanying drawings and embodiments.

[0028] It should be noted that specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced with different and / or alternative methods, steps, techniques, etc. without departing from the scope of the present application. Therefore, the present application should not be construed as being limited to the embodiments set forth herein.

[0029] Figure 1 A schematic diagram of a module connection of a power supply system is provided in the present application. As shown in Figure 1 , the power supply system comprises: a communication control module 101, a current detection module 102, a voltage control module 103 and a voltage regulation module 104.

[0030] The voltage control module 103 outputs a feedback voltage VFB to the voltage regulation module 104; the voltage control module 103 also receives voltage configuration parameters sent by the communication control module 101 to form a stable voltage required by a load 105.

[0031] It should be noted that the load here refers to a chip that provides current detection or power supply function by using the power supply system of the present application. For example, the chip can be used to provide a fixed power voltage to a pixel circuit of an image sensor after receiving the stable voltage.

[0032] It can be understood that the voltage configuration parameters sent by the communication control module 101 can be discrete signals in the form of binary digital quantities. During the operation of the circuit, it is necessary to convert them into analog quantities with a standard quantity (or reference quantity) as a reference. Therefore, in the embodiments of the present application, the voltage control module 103 can optionally comprise a digital-to-analog converter. The digital-to-analog converter is used to receive the voltage configuration parameters sent by the communication control module 101 and output an adjustment voltage VDAC based on the voltage configuration parameters, so as to form the stable voltage required by the load 105 based on the adjustment voltage VDAC. That is, the digital-to-analog converter receives the digital signal sent by the communication control module 101 and converts it into an analog signal to output the adjustment voltage VDAC.

[0033] The voltage regulation module 104 provides a stable voltage for the load 105 based on the feedback voltage VFB. It should be noted that the stable voltage here is not the voltage VOUT1 directly output by the voltage regulation module 104, but a second output voltage VOUT2 affected by the voltage drop of the connected current detection module.

[0034] Reference is made to Figure 1The circuit intersection of the voltage control module 103, the voltage stabilizing adjustment module 104 and the load 105 is a voltage stabilizing node N, and a stable voltage is provided based on the voltage stabilizing node N during the working process of the power supply system, that is, the voltage of the voltage stabilizing node N is constant during the working process of the power supply system, but it can be understood that the constant voltage is a relative concept, and may also be affected by process or circuit to produce certain fluctuations.

[0035] The current detection module 102 is used at least for detecting the current of the load 105, as shown in the figure. Figure 1 As shown in the figure, the current detection module 102 includes a first passage end and a second passage end, the first passage end is connected to the voltage stabilizing adjustment module 104, and the second passage end is connected to the load 105 through the voltage stabilizing node N, and the current detection module 102 is arranged between the voltage stabilizing adjustment module 104 and the voltage stabilizing node N, so that the voltage is kept stable during the current detection process of the load, and the influence of the voltage drop is reduced.

[0036] In the embodiment of the present application, on the one hand, the voltage configuration parameters sent by the communication control module are used to make the voltage control module output the adjustment voltage VDAC for regulating the voltage of the voltage stabilizing node N, and output the feedback voltage VFB to the voltage stabilizing adjustment module, so that the voltage stabilizing adjustment module regulates the voltage output by itself, and finally provides the load with stable voltage; on the other hand, the current detection module is arranged between the output end of the voltage stabilizing adjustment module and the load, and the voltage stabilizing node is arranged between the current detection module and the load, so that the voltage of the voltage stabilizing node can be directly provided to the load, the influence of the voltage drop caused by the current detection module on the stable voltage provided to the load is reduced, and the current detection process of the load can also keep the voltage stabilizing state, and the current detection problem caused by the voltage drop is reduced.

[0037] In some embodiments, the communication control module not only sends the working parameters to the voltage control module, but also is used for calculating the current value of the load. Please refer to Figure 2 , Figure 2 Another module connection schematic diagram of the power supply system provided by the present application is shown. The communication control module includes a communication module 112 and a host computer 111 which communicate with each other; the communication module 112 is used for transmitting the voltage configuration parameters output by the host computer 111 to the voltage control module 103, and transmitting the current range control parameters output by the host computer 111 to the current detection module 102, and in the embodiment of the present application, the communication module 112 is also used for sending the digital signal fed back by the current detection module 102 to the host computer 111.

[0038] Optionally, in the present application, the communication module can communicate with the host computer through a USB interface. Of course, in other embodiments, other communication protocols also exist, which can be set according to the demand, and are not limited herein.

[0039] It can be understood that, since the signal detected by the current detection module is a voltage signal, and the current detection module needs to convert the analog signal into a digital signal before outputting to the communication module, an analog-to-digital converter should be provided in the current detection module.

[0040] Further, based on the digital signal fed back by the current detection module 102, the host computer 111 calculates the current value of the load 105.

[0041] As shown in Figure 3 , Figure 3 is a partial structure diagram of a voltage regulation module provided by the application. The voltage regulation module 104 includes a voltage regulator 114, which includes an input pin IN, an output pin OUT, and a feedback pin FB. Of course, the voltage regulator 114 also includes a ground pin for grounding.

[0042] Among them, the input pin IN receives a fixed voltage VIN, the feedback pin FB is connected to the voltage control module 103 and receives a feedback voltage VFB, and the voltage regulator 114 further includes a first reference voltage VREF1; the output pin OUT is connected to the first pass end of the current detection module 102, and outputs a first stable voltage VOUT1 based on the feedback voltage VFB output by the voltage control module 103, the first reference voltage VREF1 and the fixed voltage VIN.

[0043] Optionally, the voltage regulator 114 can be a linear voltage regulator, which makes a bipolar or field effect power transistor operate in its linear mode; optionally, the voltage regulator 114 can also be a switching voltage regulator, etc. Further optionally, the internal circuit of the voltage regulator is as shown in Figure 3 , the voltage regulator 114 includes an error amplifier 115 and a regulating tube M3, and the output voltage of the error amplifier 115 is connected to the gate of the regulating tube M3. The regulating tube M3 here acts as a variable resistor connected in series with the fixed voltage input end and the load 105.

[0044] The principle is as follows: When the current of the load 105 increases, the output voltage of the voltage regulator module 104 decreases, causing the feedback voltage VFB to also decrease. The feedback voltage VFB is compared with the first reference voltage VREF1. At this time, the feedback voltage VFB is less than the first reference voltage VREF1. The error amplifier 115 generates more current and inputs it to the gate of the regulating transistor M3, reducing the voltage drop of the regulating transistor M3. The fixed voltage VIN is less affected by the voltage drop, resulting in an increase in the output voltage of the voltage regulator module 104, thus achieving voltage regulation. In another case, when the current of the load 105 decreases, the output voltage of the voltage regulator module 104 increases, causing the feedback voltage VFB to also increase. The feedback voltage VFB is compared with the first reference voltage VREF1. At this time, the feedback voltage VFB is greater than the first reference voltage VREF1. The error amplifier 115 generates less current and inputs it to the gate of the regulating transistor M3, increasing the voltage drop of the regulating transistor M3. The fixed voltage VIN is more affected by the voltage drop, resulting in a decrease in the output voltage of the voltage regulator module 104, thus achieving voltage regulation. In summary, the first stable voltage VOUT1 of the voltage regulation module 104 remains constant and is in a well-regulated state.

[0045] Understandably, due to the voltage drop across the circuit, the fixed voltage VIN is greater than the first stable voltage VOUT1.

[0046] In some embodiments, the voltage regulation module further includes resistive and capacitive components, such as capacitors, to realize the voltage regulation function of the voltage regulation module.

[0047] like Figure 4 As shown, Figure 4 This is a partial structural diagram of a power supply system provided by the present invention. The current detection module 102 includes an analog-to-digital converter 121 and at least two control and detection paths connected in parallel. Optionally, there are many types of analog-to-digital converters. According to different working principles, they can be divided into indirect ADCs and direct ADCs. Indirect ADCs first convert the input analog voltage into time or frequency, and then convert these intermediate quantities into digital quantities. Commonly used ones are dual-integral ADCs where the intermediate quantity is time. Direct ADCs directly convert analog voltage into digital quantities. Commonly used ones are parallel comparator ADCs and successive approximation ADCs. The selection of the analog-to-digital converter can be determined according to the actual needs of the circuit design and is not limited here.

[0048] After receiving the current range control parameters output by the communication control module 101, the current detection module 102 switches the current detection range by controlling the on and off states of at least two parallel control detection paths. These control detection paths serve both to control the current detection range and to detect the voltage in the series circuit. Optionally, refer to [further details omitted]. Figure 4The at least two parallel control detection paths include a first control detection path 122 and a second control detection path 123, and the first control detection path 122 and the second control detection path 123 are connected in series with the voltage regulation module 104 and the load 105 respectively; wherein, the switch transistor is used to control whether the circuit path is turned on or not, and the resistance with high precision is used to detect the voltage on the series circuit, and thus, with reference to the foregoing Figure 4 The first control detection path 122 includes a first switch transistor M1 and a first sampling resistance R1, and the second control detection path 123 includes a second switch transistor M2 and a second sampling resistance R2, and the current detection module 102 switches the current detection range by controlling the opening and closing of the first switch transistor M1 and the second switch transistor M2 after receiving the current range control parameter.

[0049] It should be noted that the first switch transistor and the second switch transistor can be field effect transistors.

[0050] The analog-to-digital converter 121 quantizes the analog signal into a digital signal and feeds it back to the communication control module 101, in the embodiment of the present application, the analog-to-digital converter 121 quantizes the voltage analog signal detected by the control detection path into a voltage digital signal and feeds it back to the communication module 112, and then the communication module 112 sends it to the host computer 111, so that the host computer 111 calculates the current value of the load 105 by using the voltage digital signal fed back by the analog-to-digital converter and the voltage configuration parameter issued by itself.

[0051] Optionally, the current detection module can communicate with the communication module through the I2C bus, and / or the voltage control module can communicate with the communication module through the I2C bus. The I2C bus is very simple in physical connection, and is composed of SDA (serial data line) and SCL (serial clock line) and pull-up resistance. The communication principle is to generate the signals required by the I2C bus protocol to transfer data by controlling the high and low level time sequence of the SCL and SDA lines. When the bus is idle, the two lines are generally pulled up by the pull-up resistance connected above, maintaining a high level.

[0052] Of course, in other embodiments, other communication protocols also exist, for example, the current detection module and the communication module can communicate through the SPI protocol, and the voltage control module and the communication module can also communicate through the SPI protocol. The communication principle of SPI works in a master-slave mode, and this mode usually has one master device and one or more slave devices.

[0053] In the present application, the communication mode between the modules can be set by demand and circuit design, which is not limited here.

[0054] With reference to the foregoing Figure 4In some embodiments, in addition to the digital-to-analog converter 131, the voltage control module 103 also includes a resistor network 132, wherein the first end of the resistor network 132 is connected to the output of the regulated voltage VDAC of the digital-to-analog converter 131, the second end of the resistor network 132 outputs the feedback voltage VFB, the third end of the resistor network 132 is connected to the load 105, and the fourth end of the resistor network 132 is connected to the regulated reference voltage VREF2.

[0055] Optionally, the resistor network 132 includes a third sampling resistor R3, a fourth sampling resistor R4, and a fifth sampling resistor R5. One end of each of the third sampling resistor R3, the fourth sampling resistor R4, and the fifth sampling resistor R5 is connected to the voltage regulation module 104 and serves as the output terminal of the feedback voltage VFB. The other end of the third sampling resistor R3 is connected to the load 105. The other end of the fourth sampling resistor R4 is connected to the adjustment reference voltage VREF2. Optionally, the adjustment reference voltage VREF2 is a ground voltage, that is, the other end of the fourth sampling resistor R4 is grounded. The other end of the fifth sampling resistor R5 is connected to the output terminal of the adjustment voltage VDAC of the digital-to-analog converter 131.

[0056] Optionally, the ratio of the resistance values ​​of the third sampling resistor R3, the fourth sampling resistor R4, and the fifth sampling resistor R5 is 7:1:7, thereby setting the maximum output voltage that the voltage regulation module can output.

[0057] In this embodiment of the invention, the power supply system satisfies the formula:

[0058]

[0059] Wherein, VDAC is the regulated voltage output by the voltage control module, VFB is the feedback voltage provided by the voltage control module, VOUT2 is the voltage of the regulated node, VREF2 is the regulated reference voltage, R3 is the third sampling resistor, R4 is the fourth sampling resistor, and R5 is the fifth sampling resistor.

[0060] like Figure 4 As shown, the circuit intersection of the third sampling resistor R3, the fourth sampling resistor R4, and the fifth sampling resistor R5 is node P. The current between node P and the regulating reference voltage VREF2 is I1 = (VFB - VREF2) / R4. When the other end of R4 is grounded, i.e., VREF2 = 0, the corresponding I1 = VFB / R4. The current between the voltage regulator node N and node P is I2 = (VOUT2 - VFB) / R3. The current between the digital-to-analog converter 131 and node P is I3 = (VDAC - VFB) / R5. Since I1 = I2 + I3, we can obtain: When the other end of R4 is grounded, i.e., VREF2 = 0, the formula is:

[0061] In the embodiment of the present application, the voltage control module outputs the regulated voltage VDAC, and based on the setting of the resistance network, the voltage corresponding to the load can be outputted by the voltage stabilization node. When the voltage outputted to the load increases or decreases, the voltage control module outputs the feedback voltage VFB to the voltage stabilization module, and the voltage stabilization module controls the size of the output voltage by comparing the feedback voltage VFB with the first reference voltage VREF1, so as to restore the voltage outputted to the load, thereby realizing voltage stabilization.

[0062] The present application also provides a chip power supply test device comprising the above-mentioned power supply system, which can be used to supply power to the chip and can also be used for current detection of the chip.

[0063] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field of the present application, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them shall be regarded as falling within the protection scope of the present application.

Claims

1. A power supply system, characterized in that, include: Voltage control module, voltage regulation module, current detection module, communication control module; The voltage control module outputs a feedback voltage to the voltage regulation module; the voltage control module also receives voltage configuration parameters sent by the communication control module to form a stable voltage required by the load. The voltage regulation module provides the stable voltage to the load based on the feedback voltage; The circuit intersection of the voltage control module, the voltage regulation module, and the load is the voltage regulation node, and the stable voltage is provided based on the voltage regulation node during the operation of the power supply system. The current detection module is used to detect the current of the load; wherein, the current detection module includes a first path terminal and a second path terminal, the first path terminal is connected to the voltage regulation module, and the second path terminal is connected to the load through the voltage regulation node; The current detection module includes an analog-to-digital converter and at least two parallel control detection paths, wherein any one of the at least two parallel control detection paths is connected in series with the voltage regulation module and the load. After receiving the current range control parameters output by the communication control module, the current detection module switches the current detection range by controlling the opening and closing of the control detection path. The analog-to-digital converter quantizes the analog signal into a digital signal and then feeds it back to the communication control module.

2. The power supply system as described in claim 1, characterized in that, The communication control module includes a communication module and a host computer that communicate with each other; The communication module is used to transmit the voltage configuration parameters output by the host computer to the voltage control module and the current range control parameters output by the host computer to the current detection module. The communication module is also used to send the digital signal fed back by the current detection module to the host computer. Based on the voltage configuration parameters and the digital signal fed back by the current detection module, the host computer calculates the current value of the load.

3. The power supply system as described in claim 1, characterized in that, The voltage regulation module includes a voltage regulator, which includes an input pin, an output pin, and a feedback pin. The input pin receives a fixed voltage; the feedback pin is connected to the voltage control module and receives the feedback voltage; the regulator also includes a first reference voltage; the output pin is connected to the first path terminal of the current detection module and outputs a first stable voltage based on the feedback voltage output by the voltage control module, the first reference voltage, and the fixed voltage.

4. The power supply system as described in claim 3, characterized in that, The voltage regulator includes an error amplifier and a regulating tube; and / or, the voltage regulation module further includes a resistor-capacitor component.

5. The power supply system as described in claim 3, characterized in that, The fixed voltage is greater than the first stable voltage.

6. The power supply system as described in claim 1, characterized in that, The at least two parallel control detection paths include a first control detection path and a second control detection path, wherein the first control detection path and the second control detection path are respectively connected in series with the voltage regulation module and the load; The first control detection path includes a first switching transistor and a first sampling resistor, and the second control detection path includes a second switching transistor and a second sampling resistor. After receiving the current range control parameters, the current detection module switches the current detection range by controlling the opening and closing of the first switching transistor and the second switching transistor.

7. The power supply system as described in claim 3, characterized in that, The voltage of the voltage regulator node is less than the first stable voltage.

8. The power supply system as described in claim 2, characterized in that, The current detection module communicates with the communication module via an I2C bus; and / or, The voltage control module communicates with the communication module via an I2C bus.

9. The power supply system according to any one of claims 1-8, characterized in that, The voltage control module includes a digital-to-analog converter (DAC), which receives voltage configuration parameters sent by the communication control module and outputs an regulated voltage based on the voltage configuration parameters to form the stable voltage.

10. The power supply system as described in claim 9, characterized in that, The voltage control module further includes a resistor network. The first end of the resistor network is connected to the output terminal of the regulated voltage of the digital-to-analog converter. The second end of the resistor network outputs the feedback voltage. The third end of the resistor network is connected to the load. The fourth end of the resistor network is connected to the regulated reference voltage.

11. The power supply system as claimed in claim 10, characterized in that, The resistor network includes a third sampling resistor, a fourth sampling resistor, and a fifth sampling resistor. One end of each of the third, fourth, and fifth sampling resistors is connected to the voltage regulation module and serves as the output terminal of the feedback voltage. The other end of the third sampling resistor is connected to the load, the other end of the fourth sampling resistor is connected to the regulation reference voltage, and the other end of the fifth sampling resistor is connected to the output terminal of the regulation voltage of the digital-to-analog converter.

12. The power supply system as claimed in claim 11, characterized in that, The power supply system satisfies the following formula: Wherein, VDAC is the regulated voltage output by the voltage control module, VFB is the feedback voltage provided by the voltage control module, VOUT2 is the voltage of the voltage regulator node, VREF2 is the regulated reference voltage, R3 is the third sampling resistor, R4 is the fourth sampling resistor, and R5 is the fifth sampling resistor.

13. A chip power supply testing device, characterized in that, Includes the power supply system as described in any one of claims 1-12, wherein the chip power supply test equipment is used to supply power to the chip; and / or, the chip power supply test equipment is used to perform current detection on the chip.

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