An adjustable current stabilizing circuit

Abstract

The utility model relates to electronic circuit field especially relates to a kind of adjustable current voltage stabilizing circuit, including acquisition control module, adjustable resistance unit and voltage stabilizing device;The adjustable resistance unit is connected between input voltage end and voltage stabilizing device, and the resistance value of the adjustable resistance unit is controlled by control signal;The acquisition control module is used to collect the input voltage, the voltage of both ends of the voltage stabilizing device and output voltage, and according to the voltage value of acquisition generates the control signal;Wherein, the acquisition control module passes through the resistance value of the adjustable resistance unit by dynamic adjustment, so that the working current of the voltage stabilizing device is maintained in preset range.The utility model carries out feedback according to load variation, and the resistance value of adjustable resistance unit is flexibly adjusted by gate signal, and the working efficiency of circuit can be improved, and the loss of voltage stabilizing diode is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to an adjustable current voltage regulator circuit. Background Technology

[0002] With the rapid development of the electronics industry, various circuits are constantly iterating and upgrading. Among them, power supply circuits have evolved from building circuits themselves to using integrated power supply chips. Although using integrated power supply chips is more convenient, the cost has also increased accordingly. Diode voltage regulator circuits, as one of the common power supply circuits, have relatively low cost and are relatively simple to build.

[0003] Traditional diode voltage regulator circuits lack regulation capabilities, so the losses of the Zener diode change with load variations, reducing its efficiency; sometimes, load changes can even cause the circuit to malfunction. While some improvements exist in existing technologies, none have fundamentally resolved the contradiction between adaptive regulation and efficiency optimization.

[0004] A Chinese patent with publication number CN212623799U discloses a circuit that can adjust the output current according to load changes. It uses a controllable constant current source to detect load voltage changes and dynamically adjusts the output current to reduce the impact of parasitic resistance. While this solution achieves load feedback regulation, it lacks fine-grained management of the Zener diode's operating current, making it difficult to maintain efficient voltage regulation under significant load fluctuations.

[0005] Furthermore, once the parameters of current voltage regulator circuits are set, they are uncontrollable, lack feedback, and cannot dynamically match the optimal operating point when the load changes. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this utility model provides an adjustable current voltage regulator circuit that can provide feedback according to changes in the load and flexibly adjust the resistance value of the adjustable resistor unit through a gating signal, thereby improving the circuit's working efficiency and reducing the loss of the Zener diode.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An adjustable current voltage regulator circuit includes a data acquisition and control module, an adjustable resistor unit, and a voltage regulator device. The adjustable resistor unit is connected between the input voltage terminal and the voltage regulator device, and the resistance value of the adjustable resistor unit is controlled by the control signal. The acquisition and control module is used to acquire the input voltage, the voltage across the voltage regulator and the output voltage, and generate the control signal based on the acquired voltage values; The acquisition and control module dynamically adjusts the resistance value of the adjustable resistor unit to maintain the operating current of the voltage regulator within a preset range.

[0008] Furthermore, it also includes a sampling module; The input terminal of the adjustable resistor unit is connected to the input voltage; The control signal is the gating signal output by the acquisition control module; The negative terminal of the voltage regulator is connected to the output terminal of the adjustable resistor unit, the positive terminal of the voltage regulator is grounded, and the negative terminal of the voltage regulator provides a reference voltage. One end of the sampling module is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage; The acquisition and control module is used to acquire the input voltage, the reference voltage and the output voltage, and generate the gating signal based on the acquired voltage value to dynamically adjust the resistance value of the adjustable resistor unit.

[0009] Furthermore, The voltage regulator device is a Zener diode; The lower limit of the preset range is the minimum current value required for the Zener diode to operate normally.

[0010] Furthermore, The adjustable resistor unit includes a channel selection module and a resistor network; The channel selection module has an enable terminal, several address signal terminals, and several output channels. The selection signal is applied to the enable terminal and the address signal terminals to control the selection of different output channels. The resistor network is a series branch consisting of several resistors connected in series. The series branch has a first end and a second end. The connection point of each two adjacent resistors constitutes a node. The first end, the second end, and the node together constitute several selection points. The different output channels of the channel selection module are connected to different selection points so that different resistance values ​​are connected to the circuit when selection is performed.

[0011] Furthermore, The gating relationship between the address signal terminal and the output channel satisfies a preset truth table logic, and the gating signal includes an enable signal applied to the enable terminal and a combination of digital signals applied to the address signal terminal.

[0012] Furthermore, The digital signal combination is a binary code, and the number of bits in the binary code is the same as the number of address signal terminals; When the channel selection module receives a valid level at the enable terminal, it selects a corresponding output channel according to the binary code of the address signal terminal.

[0013] Furthermore, The resistors in the resistor network have equal resistance values, or the resistors in the resistor network have non-equal resistance values.

[0014] Furthermore, The acquisition and control module has a first voltage acquisition terminal, a second voltage acquisition terminal, a third voltage acquisition terminal, an enable output terminal, and several control signal output terminals; The first voltage acquisition terminal is connected to the input terminal of the adjustable resistor unit; The second voltage acquisition terminal is connected to the negative terminal of the voltage regulator; The third voltage acquisition terminal is connected to the output terminal of the sampling module; The enable output terminal is connected to the enable terminal of the channel selection module; The number of control signal output terminals is the same as the number of address signal terminals, and the control signal output terminals are connected to the address signal terminals.

[0015] Furthermore, The acquisition control module is configured as follows: Based on the collected input voltage, reference voltage, and output voltage, estimate the current flowing through the Zener diode; Compare the estimated current with the minimum current required for the Zener diode to operate normally; Based on the comparison results, the gating signal is adjusted to change the resistance value of the adjustable resistor unit, so that the operating current of the voltage regulator is maintained within a preset range.

[0016] Furthermore, The sampling module is a sampling resistor, one end of which is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: By considering load feedback directly in the design phase, the adaptive adjustment of the matching resistor (i.e., the equivalent resistance of the adjustable resistor unit) is taken into account in advance, and the resistance value can be adjusted through a control signal (i.e., a gating signal). In this way, when the load change is detected based on the collected voltage value, the resistance value of the matching resistor (i.e., the resistance value of the adjustable resistor unit) can be dynamically adjusted to keep the operating current of the voltage regulator within the preset range, which can achieve a good regulation effect, greatly improve the working efficiency of the circuit, and effectively reduce the loss of the Zener diode.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings.

[0019] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an adjustable current voltage regulator circuit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the channel selection module according to one embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the working process of an adjustable current voltage regulator circuit according to one embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figure 1 As shown, one embodiment of this specification provides an adjustable current voltage regulator circuit, including a data acquisition and control module, an adjustable resistor unit, and a voltage regulator device; The adjustable resistor unit is connected between the input voltage terminal and the voltage regulator device, and the resistance value of the adjustable resistor unit is controlled by the control signal. The acquisition and control module is used to acquire the input voltage, the voltage across the voltage regulator and the output voltage, and generate the control signal based on the acquired voltage values; The acquisition and control module dynamically adjusts the resistance value of the adjustable resistor unit to maintain the operating current of the voltage regulator within a preset range.

[0024] The above technical solution includes a data acquisition and control module, an adjustable resistor unit, and a voltage regulator. It directly considers load feedback during the design phase and incorporates the adaptive adjustment of the matching resistor (i.e., the equivalent resistance of the adjustable resistor unit, also known as the input resistance) into the design in advance. It can provide feedback according to changes in the load and flexibly adjust the resistance value of the adjustable resistor unit through control signals, thereby improving the circuit's working efficiency and reducing the losses of the Zener diode.

[0025] As a preferred technical solution, the system further includes a sampling module; the input terminal of the adjustable resistor unit is connected to an input voltage; the control signal is a gating signal output by the acquisition control module; the negative terminal of the voltage regulator is connected to the output terminal of the adjustable resistor unit, the positive terminal of the voltage regulator is grounded, and the negative terminal of the voltage regulator provides a reference voltage; one end of the sampling module is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage; the acquisition control module is used to acquire the input voltage, the reference voltage, and the output voltage, and generate the gating signal based on the acquired voltage values ​​to dynamically adjust the resistance value of the adjustable resistor unit.

[0026] This embodiment directly considers load feedback during the design phase, incorporating adaptive adjustment of the matching resistor (the equivalent resistance of the adjustable resistor unit, also known as the input resistance) into the design in advance. Furthermore, the resistance value can be adjusted via a gating signal. Thus, when a load change is detected based on the acquired voltage value, the resistance value of the matching resistor (i.e., the resistance value of the adjustable resistor unit) can be dynamically adjusted, ensuring that the current flowing through the Zener diode approaches a preset current value (ensuring the operating current of the voltage regulator remains within a preset range). This achieves a good adjustment effect, significantly improves circuit efficiency, and effectively reduces the losses of the Zener diode.

[0027] As a preferred technical solution, the voltage regulator is a Zener diode; the lower limit of the preset range is the minimum current value required for the Zener diode to operate normally.

[0028] In this embodiment, the lower limit of the preset range is the minimum current value required for the Zener diode to operate normally. This sets a clear and safe lower limit boundary for the dynamic adjustment of the circuit, which can ensure the stable operation of the Zener diode, significantly reduce losses, and help maximize efficiency.

[0029] This embodiment maintains the operating current of the voltage regulator within a preset range, and sets the lower limit of the preset range as the minimum current value required for the Zener diode to operate normally, denoted as Izmin. The purpose is to ensure that the current flowing through the Zener diode is close to the minimum current value required for normal operation. In traditional diode voltage regulator circuits, the matching resistor is fixed. When the load (Iout) changes, according to the formula Iz = Iin - Iout, where Iz is the current flowing through the Zener diode, Iin is the input current, and Iout is the output current, the current Iz flowing through the Zener diode will fluctuate drastically to maintain voltage regulation. If Iz is much greater than Izmin, the excess energy will be dissipated as heat in the diode, leading to reduced circuit efficiency; if Iz is lower than Izmin, the Zener diode cannot regulate voltage properly, and the circuit malfunctions. This embodiment ensures that Iz is close to Izmin under any load by adaptively adjusting the resistance value of the matching resistor (i.e., adaptively adjusting the resistance value of the adjustable resistor unit), fundamentally solving this problem.

[0030] As a preferred technical solution, the adjustable resistor unit includes a channel selection module and a resistor network; the channel selection module has an enable terminal, several address signal terminals, and several output channels, and the selection signal is applied to the enable terminal and the address signal terminals to control the selection of different output channels; the resistor network is a series branch formed by several resistors connected in series, and the series branch has a first terminal and a second terminal, wherein the connection point of every two adjacent resistors constitutes a node, and the first terminal, the second terminal, and the node together constitute several selection points; different output channels of the channel selection module are respectively connected to different selection points so that different resistance values ​​are connected to the circuit when selection is performed.

[0031] The overall structure of the adjustable resistor unit in this embodiment is as follows: Figure 1 As shown.

[0032] The structure of the channel selection module in this embodiment is as follows: Figure 2 As shown.

[0033] In this embodiment, the input terminal of the channel selection module is Y, the enable terminal is EN, and the address signal terminals include A0, A1, and A2; the output channels include 8 channels D0-D7.

[0034] As a preferred technical solution, the gating relationship between the address signal terminal and the output channel satisfies a preset truth table logic, and the gating signal includes an enable signal applied to the enable terminal and a combination of digital signals applied to the address signal terminal.

[0035] As a preferred technical solution, the digital signal combination is a binary code, and the number of bits in the binary code is the same as the number of address signal terminals; when the channel selection module receives a valid level at the enable terminal, it selects a corresponding output channel according to the binary code of the address signal terminal.

[0036] As a preferred technical solution, the resistance values ​​of all resistors in the resistor network are equal, or the resistance values ​​of all resistors in the resistor network are configured with non-equal values.

[0037] The core of the adjustable current regulator circuit in this embodiment is to precisely control the current Iz by changing the total resistance Rx of the series resistor network (i.e., the aforementioned resistor network). If all resistors have the same resistance value (i.e., equal value configuration), then the change of Rx is linear and in equal steps. However, by using a non-equal value configuration, more intelligent and efficient adjustment can be achieved according to actual adjustment needs.

[0038] In simple terms: the adjustment step of the equal value configuration method is fixed and easy to implement; the adjustment step of the non-equal value configuration method is variable, which can achieve fine adjustment in key areas or rapid adjustment over a wide range.

[0039] In some preferred embodiments, the non-equivalent configuration employs a binary configuration, meaning that the resistance values ​​of each resistor are no longer equal but increase in powers of 2. This significantly expands the dynamic range, achieving the maximum adjustment range with the fewest number of resistors. In specific implementations, the non-equivalent configuration can also employ other configuration methods, such as non-equivalent configuration based on preset adjustment accuracy requirements.

[0040] As a preferred technical solution, the acquisition and control module has a first voltage acquisition terminal, a second voltage acquisition terminal, a third voltage acquisition terminal, an enable output terminal, and a plurality of control signal output terminals; the first voltage acquisition terminal is connected to the input terminal of the adjustable resistor unit; the second voltage acquisition terminal is connected to the negative terminal of the voltage regulator; the third voltage acquisition terminal is connected to the output terminal of the sampling module; the enable output terminal is connected to the enable terminal of the channel selection module; the number of control signal output terminals is the same as the number of address signal terminals, and the control signal output terminals are connected to the address signal terminals.

[0041] In this embodiment, the first voltage acquisition terminal, the second voltage acquisition terminal, and the third voltage acquisition terminal are ADC1, ADC2, and ADC3, respectively; the enable output terminal is CN; and the control signal output terminals include C0, C1, and C2.

[0042] As a preferred technical solution, the acquisition control module is configured as follows: Based on the collected input voltage, reference voltage, and output voltage, estimate the current flowing through the Zener diode; Compare the estimated current with the minimum current required for the Zener diode to operate normally; Based on the comparison results, the gating signal is adjusted to change the resistance value of the adjustable resistor unit, so that the operating current of the voltage regulator is maintained within a preset range.

[0043] As a preferred technical solution, the sampling module is a sampling resistor, one end of which is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage.

[0044] In this embodiment, the sampling resistor is R7.

[0045] To make the adjustable current voltage regulator circuit of this embodiment clearer, the adjustable current voltage regulator circuit will be further explained below in conjunction with the above-mentioned preferred technical solutions.

[0046] like Figure 1 As shown, the voltage regulator circuit in this embodiment includes a channel selection module, resistors (R0, R1, R2, R3, R4, R5, R6, R7), a Zener diode Z1, and a data acquisition and control module.

[0047] The working logic of the channel selection module in this embodiment (i.e., the preset truth table logic) is shown in Table 1 below. When the EN enable pin is low (0), none of the channels are turned on. When the EN enable pin is high (1), the acquisition and control module sends the corresponding digital signals (i.e., combinations of digital signals, which are encoded in binary in this embodiment) to A0, A1, and A2 to control the conduction status of the eight channels D0-D7.

[0048] Table 1 Working Logic of Channel Selection Module

[0049] The connection relationships and signal definitions of the adjustable current voltage regulator circuit in this embodiment will be further explained below.

[0050] The input voltage Vin is connected to the Y pin of the channel selection module; the input current is Iin; Vin is acquired by the ADC1 port of the acquisition control module.

[0051] The EN pin of the channel selection module is connected to the CN pin of the acquisition control module; the A0 pin of the channel selection module is connected to the C0 pin of the acquisition control module; the A1 pin of the channel selection module is connected to the C1 pin of the acquisition control module; and the A2 pin of the channel selection module is connected to the C2 pin of the acquisition control module.

[0052] Resistors R0, R1, R2, R3, R4, R5, and R6 are connected in series. Port D0 is connected to the first end of resistor R0 (the upper end in this embodiment), port D1 is connected to the first end of resistor R1 (the upper end in this embodiment), port D2 is connected to the first end of resistor R2 (the upper end in this embodiment), port D3 is connected to the first end of resistor R3 (the upper end in this embodiment), port D4 is connected to the first end of resistor R4 (the upper end in this embodiment), port D5 is connected to the first end of resistor R5 (the upper end in this embodiment), port D6 is connected to the first end of resistor R6 (the upper end in this embodiment), and port D7 is connected to the second end of resistor R6 (the lower end in this embodiment). Ports D0 to D7 represent different output channels of the channel selection module.

[0053] The second terminal of R6 (the lower terminal in this embodiment) is connected to the negative terminal of Zener diode Z1, and the positive terminal of Zener diode is connected to ground. The stable voltage of the negative terminal of Zener diode is Vz, which is acquired by ADC2. The current flowing through Zener diode Z1 is Iz.

[0054] The negative terminal of Zener diode Z1 is connected to R7, and the output voltage through R7 is Vout; ADC3 samples Vout, and the current flowing through R7 is Iout.

[0055] To make the adjustable current voltage regulator circuit of this embodiment clearer, the working principle of the circuit will be further explained below.

[0056] In this embodiment, the selected resistor (i.e., the equivalent resistance of the adjustable resistor unit) is replaced by Rx; for example, after the D4 channel is selected and turned on, Rx = R4 + R5 + R6.

[0057] according to Figure 1 The following calculation formula can be obtained: Iin = Iz + Iout; ; ; Therefore, the formula for calculating Iz can be obtained: .

[0058] Based on the above calculation formula for Iz, in actual use, it is necessary to adjust the matching resistor (i.e., the equivalent resistance of the adjustable resistor unit) Rx as much as possible so that Iz = Izmin (i.e., the minimum current that the Zener diode can operate at), thereby minimizing losses and maximizing efficiency. When the operating current of Iz is relatively large, it will consume energy through the heat generated by the Zener diode. When it exceeds the maximum current that the Zener diode can operate at, Izmax, the diode will be damaged.

[0059] In actual operation, Vin, Vz, Vout, and R7 are all values ​​that can be collected. Substituting these values ​​into the above formula, and dynamically adjusting Rx, we can keep Iz as close to Izmin as possible. To achieve this adjustment, the flowchart of the feedback adjustment in this embodiment (i.e., the flowchart of the adjustable current voltage regulator circuit) is as follows: Figure 3 As shown.

[0060] Figure 3 It embodies the entire feedback process from acquisition and comparison to adjustment, and can effectively realize closed-loop control of Iz, so that the current flowing through the Zener diode is as close as possible to the lower limit of the preset range (i.e., the minimum current value required for the Zener diode to work normally).

[0061] Traditional diode voltage regulator circuits can only match one type of resistor at a time, requiring repeated soldering to verify the optimal matching scheme. The adjustable current voltage regulator circuit in this embodiment is more flexible in use, without needing to consider actual load changes. It only needs to detect the load for feedback and freely adjust the matching resistor through a gating signal. Since it can freely switch through a gating signal, the circuit is also more efficient.

[0062] In summary, this embodiment directly considers load feedback during the design phase, incorporates adaptive adjustment of the matching resistor into the design in advance, and achieves dynamic adjustment through a gating signal. Thus, when a change in load is detected, it will automatically identify and detect it (based on the aforementioned feedback adjustment process), adjust the matching resistor to achieve the adjustment effect, greatly improve the circuit's working efficiency, and also reduce the losses of the Zener diode.

[0063] This utility model has at least the following features: 1. It has an automatic load detection function, which can detect changes in load by collecting voltage values.

[0064] 2. The resistance value of the matching resistor can be automatically adjusted by the strobe signal, thereby controlling the loss of the voltage regulator circuit.

[0065] 3. The circuit construction cost is low, and the layout has a high degree of freedom, which can better meet the needs of practical applications.

[0066] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0067] The parts not mentioned in the above embodiments are the same as or can be implemented using existing technologies, and will not be further described here.

[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable current voltage regulator circuit, characterized in that, Includes a data acquisition and control module, an adjustable resistor unit, and a voltage regulator; The adjustable resistor unit is connected between the input voltage terminal and the voltage regulator device, and the resistance value of the adjustable resistor unit is controlled by the control signal. The acquisition and control module is used to acquire the input voltage, the voltage across the voltage regulator and the output voltage, and generate the control signal based on the acquired voltage values; The acquisition and control module dynamically adjusts the resistance value of the adjustable resistor unit to maintain the operating current of the voltage regulator within a preset range.

2. The adjustable current voltage regulator circuit according to claim 1, characterized in that, It also includes a sampling module; The input terminal of the adjustable resistor unit is connected to the input voltage; The control signal is the gating signal output by the acquisition control module; The negative terminal of the voltage regulator is connected to the output terminal of the adjustable resistor unit, the positive terminal of the voltage regulator is grounded, and the negative terminal of the voltage regulator provides a reference voltage. One end of the sampling module is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage; The acquisition and control module is used to acquire the input voltage, the reference voltage and the output voltage, and generate the gating signal based on the acquired voltage value to dynamically adjust the resistance value of the adjustable resistor unit.

3. The adjustable current voltage regulator circuit according to claim 2, characterized in that, The voltage regulator device is a Zener diode; The lower limit of the preset range is the minimum current value required for the Zener diode to operate normally.

4. The adjustable current voltage regulator circuit according to claim 2, characterized in that, The adjustable resistor unit includes a channel selection module and a resistor network; The channel selection module has an enable terminal, several address signal terminals, and several output channels. The selection signal is applied to the enable terminal and the address signal terminals to control the selection of different output channels. The resistor network is a series branch consisting of several resistors connected in series. The series branch has a first end and a second end. The connection point of each two adjacent resistors constitutes a node. The first end, the second end, and the node together constitute several selection points. The different output channels of the channel selection module are connected to different selection points so that different resistance values ​​are connected to the circuit when selection is performed.

5. The adjustable current voltage regulator circuit according to claim 4, characterized in that, The gating relationship between the address signal terminal and the output channel satisfies a preset truth table logic, and the gating signal includes an enable signal applied to the enable terminal and a combination of digital signals applied to the address signal terminal.

6. The adjustable current voltage regulator circuit according to claim 5, characterized in that, The digital signal combination is a binary code, and the number of bits in the binary code is the same as the number of address signal terminals; When the channel selection module receives a valid level at the enable terminal, it selects a corresponding output channel according to the binary code of the address signal terminal.

7. The adjustable current voltage regulator circuit according to claim 4, characterized in that, The resistors in the resistor network have equal resistance values, or the resistors in the resistor network have non-equal resistance values.

8. The adjustable current voltage regulator circuit according to claim 4, characterized in that, The acquisition and control module has a first voltage acquisition terminal, a second voltage acquisition terminal, a third voltage acquisition terminal, an enable output terminal, and several control signal output terminals; The first voltage acquisition terminal is connected to the input terminal of the adjustable resistor unit; The second voltage acquisition terminal is connected to the negative terminal of the voltage regulator; The third voltage acquisition terminal is connected to the output terminal of the sampling module; The enable output terminal is connected to the enable terminal of the channel selection module; The number of control signal output terminals is the same as the number of address signal terminals, and the control signal output terminals are connected to the address signal terminals.

9. The adjustable current voltage regulator circuit according to claim 3, characterized in that, The acquisition control module is configured as follows: Based on the collected input voltage, reference voltage, and output voltage, estimate the current flowing through the Zener diode; Compare the estimated current with the minimum current required for the Zener diode to operate normally; Based on the comparison results, the gating signal is adjusted to change the resistance value of the adjustable resistor unit, so that the operating current of the voltage regulator is maintained within a preset range.

10. An adjustable current voltage regulator circuit according to claim 2, characterized in that, The sampling module is a sampling resistor, one end of which is connected to the negative terminal of the voltage regulator, and the other end outputs the output voltage.

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