Simulation power supply device

Abstract

The invention discloses an analog power supply device, which comprises a system power supply unit, an input / output unit, a control chip unit and two transmission channels, and is characterized in that each transmission channel comprises a DC-DC step-down conversion circuit and a charge / discharge control circuit which are sequentially connected between the system power supply unit and the input / output unit; the charging and discharging control circuit comprises a transmission line module, a current and voltage control module and a current and voltage sampling module. Wherein the transmission line module comprises a discharging adjusting tube, a charging adjusting tube, a first current sampling resistor, a second current sampling resistor and a first switch, and the transmission line module can be configured to form a constant-voltage charging and discharging line, a constant-current charging and discharging line of a first-gear current and a charging and discharging line of a second-gear current; therefore, the dynamic range of the analog power supply is enlarged, the analog power supply can be suitable for testing different electronic products or different test conditions, the compatibility of the analog power supply is improved, the test equipment is more convenient to maintain, and the test cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and more particularly to an analog power supply device. Background Technology

[0002] Lithium-ion batteries are essential components of modern electronic products, with a wide range of applications. From small Bluetooth headsets to large electric vehicles, lithium-ion batteries are ubiquitous in our lives. The research and development and production of electronic products using lithium-ion batteries require various types of testing, such as testing their performance under different charge levels and operating conditions. Currently, the industry has developed simulated power supply devices to replace real batteries for testing.

[0003] In the field of electronic product testing, different electronic products require different power supply parameters, and the same electronic product also requires different power supply parameters under different test conditions. For example, electronic products such as mobile phones and smartwatches require up to 10A of current under maximum power conditions (such as fast charging), while the current is less than 5μA under low power conditions. Existing analog power supplies have a small dynamic range, requiring different power supplies to be installed when testing different electronic products or under different test conditions. This results in low compatibility, inconvenient maintenance of test equipment, and increased testing costs. Summary of the Invention

[0004] In view of this, the present invention provides an analog power supply device to solve the problem of how to increase the dynamic range of the analog power supply to improve its compatibility with different electronic products or test conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An analog power supply device is characterized by comprising a system power supply unit, an input / output unit, a control chip unit, and two transmission channels. Each transmission channel includes a DC-DC step-down converter circuit and a charge / discharge control circuit connected sequentially between the system power supply unit and the input / output unit. The charge / discharge control circuit includes a transmission line module, a current / voltage control module, and a current / voltage sampling module. The transmission line module is connected between the DC-DC step-down converter circuit and the input / output unit. The input / output unit is used to connect to a load under test or a charging power supply.

[0007] The control chip unit is connected to the DC-DC buck converter circuit and the current and voltage control module. It is used to send a first voltage setting signal to the DC-DC buck converter circuit to configure the output voltage of the DC-DC buck converter circuit. It is also used to send a current setting signal and / or a second voltage setting signal to the current and / or voltage of the transmission line module during the charging and discharging phase.

[0008] The DC-DC step-down converter circuit is used to convert the input voltage provided by the system power supply unit into an output voltage based on the first voltage setting signal and input it to the transmission line module as a discharge power supply.

[0009] The transmission line module includes a discharge regulating transistor, a charging regulating transistor, a first current sampling resistor, a second current sampling resistor, and a first switch. The input terminal of the discharge regulating transistor is connected to the output terminal of the DC-DC buck converter circuit to receive discharge power. The output terminal of the discharge regulating transistor and the input terminal of the charging regulating transistor are interconnected and connected to the first terminal of the first current sampling resistor. The second terminal of the first current sampling resistor is connected to the first terminal of the second current sampling resistor. The second terminal of the second current sampling resistor is connected to the input / output unit. The first switch is connected between the first and second terminals of the second current sampling resistor. The output terminal of the charging regulating transistor is grounded. The control terminals of the discharge regulating transistor and the charging regulating transistor are respectively connected to the output terminal of the current-voltage control module.

[0010] In the specific scheme, when the input / output unit is connected to the load under test and the first switch is turned on, the discharge power supply provided by the DC-DC step-down converter circuit is connected to the load under test via the discharge regulating tube, the first current sampling resistor and the first switch, and the transmission line module is configured as a constant voltage discharge line or a constant current discharge line with the first current level.

[0011] When the input / output unit is connected to the load under test and the first switch is off, the discharge power supply provided by the DC-DC buck converter circuit is connected to the load under test via the discharge regulating tube, the first current sampling resistor and the second current sampling resistor, and the transmission line module is configured as a discharge line with the second current level.

[0012] When the input / output unit is connected to the charging power supply and the first switch is turned on, the charging power supply is connected to the ground terminal via the first switch, the first current sampling resistor and the charging adjustment tube. The transmission line module can be configured as a constant voltage charging line or a constant current charging line with the first current level.

[0013] When the input / output unit is connected to the charging power supply and the first switch is off, the charging power supply is connected to the ground terminal via the second current sampling resistor, the first current sampling resistor and the charging adjustment tube, and the transmission line module can be configured as a charging line with the second current level.

[0014] In the specific scheme, in the charging and discharging control circuit, the voltage range for charging and discharging of the transmission line module is 0 to 20V, the current range of the first current level is -10A to 10A, and the current range of the second current level is -8mA to 8mA.

[0015] In the specific design, the discharge regulating transistor is a composite NPN transistor. Its collector serves as the input terminal, connected to the output terminal of the DC-DC step-down converter circuit to receive the discharge power. Its emitter serves as the output terminal, connected to the first terminal of the first current sampling resistor. Its base serves as the control terminal, connected to the output terminal of the current-voltage control module. The charging regulating transistor is a composite PNP transistor. Its emitter serves as the input terminal, connected to the first terminal of the first current sampling resistor. Its collector serves as the output terminal, grounded. Its base serves as the control terminal, connected to the output terminal of the current-voltage control module.

[0016] In the specific solution, the current and voltage control module includes a current control submodule and a voltage control submodule, and the current and voltage sampling module includes a current sampling submodule and a voltage sampling submodule. The current control submodule and the voltage control submodule are respectively connected to the control chip unit. The current sampling submodule is connected between the transmission line module and the current control submodule and is connected to the control chip module. The voltage sampling submodule is connected between the transmission line module and the voltage control submodule and is connected to the control chip unit. The output terminal of the current control submodule is connected to the control terminal of the discharge regulating tube and the control terminal of the charge regulating tube. The output terminal of the voltage control submodule is connected to the control terminal of the discharge regulating tube and the control terminal of the charge regulating tube.

[0017] The current control submodule controls the charging and discharging current of the transmission line module based on the current setting signal issued by the control chip unit and the sampled current acquired by the current sampling submodule; the voltage control submodule controls the charging and discharging voltage of the transmission line module based on the second voltage setting signal issued by the control chip unit and the sampled voltage acquired by the voltage sampling submodule.

[0018] In a specific scheme, the current control submodule includes a first amplifier circuit, a subtraction circuit, a second amplifier circuit, and a first differential amplifier circuit connected in sequence. The control chip unit inputs a first voltage value corresponding to the current setting signal to the first amplifier circuit. The first amplifier circuit amplifies the first voltage value into a second voltage value and inputs it to the subtraction circuit. The subtraction circuit converts the second voltage value into a third voltage value and inputs it to the second amplifier circuit. The second amplifier circuit amplifies the third voltage value into a fourth voltage value and inputs it to the non-inverting input of the first differential amplifier circuit. The current sampling submodule inputs a fifth voltage value corresponding to the sampled current to the inverting input of the first differential amplifier circuit. The first differential amplifier circuit generates a first control voltage signal based on the fourth voltage value and the fifth voltage value and outputs it to the control terminal of the discharge adjustment tube or the control terminal of the charge adjustment tube, thereby controlling the charging and discharging current of the transmission line module.

[0019] Wherein, the range of the first voltage value is 0 to V1, the range of the second voltage value is 0 to V2, the range of the third voltage value is -V3 to V3, the range of the fourth voltage value is -V4 to V4, and the range of the fifth voltage value is -V4 to V4. <V1<V3<V2<V4。

[0020] In a specific implementation, the voltage control submodule includes a third amplifier circuit and a second differential amplifier circuit connected in sequence. The control chip unit inputs a sixth voltage value corresponding to the voltage setting signal to the third amplifier circuit. The third amplifier circuit amplifies the sixth voltage value into a seventh voltage value and inputs it to the non-inverting input of the second differential amplifier circuit. The voltage sampling submodule inputs an eighth voltage value corresponding to the sampled voltage to the inverting input of the second differential amplifier circuit. The second differential amplifier circuit generates a second control voltage signal based on the seventh and eighth voltage values ​​and outputs it to the control terminal of the discharge adjustment transistor or the control terminal of the charge adjustment transistor, thereby controlling the charging and discharging voltage of the transmission line module.

[0021] The range of the sixth voltage value is 0 to V5, the range of the seventh voltage value is 0 to V6, and the range of the eighth voltage value is 0 to V6. <V5<V6。

[0022] In a specific embodiment, the current sampling submodule includes a first instrumentation amplifier, the input of which is connected to the first current sampling resistor, and the output of which is connected to the current control submodule and the control chip module. The first instrumentation amplifier acquires the sampling current through the first current sampling resistor and transmits the sampling current to the current control submodule and the control chip module respectively.

[0023] In the transmission line module, the second end of the second current sampling resistor is set as a near-end voltage sampling point, and the input / output unit is set with a far-end voltage sampling point. The voltage sampling submodule includes a second instrumentation amplifier and a switching circuit. The input terminal of the second instrumentation amplifier is connected to the near-end voltage sampling point and the first terminal of the switching circuit, the second terminal of the switching circuit is connected to the far-end voltage sampling point, and the output terminal of the second instrumentation amplifier is connected to the voltage control submodule and the control chip unit. When the switching circuit is open, the second instrumentation amplifier acquires a sampling voltage from the near-end voltage sampling point; when the switching circuit is on, the second instrumentation amplifier acquires a sampling voltage from the far-end voltage sampling point. The second instrumentation amplifier transmits the acquired sampling voltage to the voltage control submodule and the control chip unit, respectively.

[0024] In a specific embodiment, the current and voltage sampling module further includes a micro-current monitoring sub-module, which is connected between the second current sampling resistor and the control chip unit. The micro-current monitoring sub-module samples the micro-current through the second current sampling resistor and feeds it back to the control chip unit.

[0025] In the specific solution, the DC-DC buck converter circuit includes an input module, a voltage conversion chip, an output module, a frequency selection acceleration module, and a voltage feedback control module; the voltage conversion chip is connected to the system power supply unit through the input module, and the voltage conversion chip is connected to the transmission line module through the output module; the voltage conversion chip converts the input voltage provided by the system power supply unit into an output voltage and inputs it to the transmission line module as a discharge power supply.

[0026] The voltage feedback control module and the frequency selection acceleration module are respectively connected between the output module and the voltage conversion chip. The voltage feedback control module is also connected to the control chip unit. The voltage feedback control module generates a control signal based on the first voltage setting signal issued by the control chip unit and the magnitude of the real-time output voltage of the output module, and inputs it to the voltage conversion chip. The frequency selection acceleration module feeds back the real-time output voltage change information of the output module to the voltage conversion chip.

[0027] The voltage conversion chip controls the magnitude of the real-time output voltage based on the control signal provided by the voltage feedback control module and the information fed back by the frequency selection acceleration module, until the real-time output voltage reaches the predetermined output voltage V. OA Wherein, when the transmission line module is configured as a discharge line and the required target discharge voltage is V OBAt that time, the first voltage setting signal issued by the control chip unit will set the predetermined output voltage V. OA Configured to be higher than the target discharge voltage V OB Large ΔV, ΔV = 2V ~ 2.5V.

[0028] The analog power supply device provided in this embodiment of the invention includes a system power supply unit, an input / output unit, a control chip unit, and two transmission channels. Each transmission channel includes a DC-DC step-down converter circuit and a charge / discharge control circuit connected sequentially between the system power supply unit and the input / output unit. The transmission line module in the charge / discharge control circuit includes a discharge regulating transistor, a charge regulating transistor, a first current sampling resistor, a second current sampling resistor, and a first switch. This transmission line module can be configured as a constant voltage charge / discharge line, a constant current charge / discharge line with a first current level, and a charge / discharge line with a second current level. This increases the dynamic range of the analog power supply, making it suitable for testing different electronic products or different test conditions, improving the compatibility of the analog power supply, making the test equipment easier to maintain, and reducing test costs. Attached Figure Description

[0029] Figure 1 This is a structural block diagram of the analog power supply device in an embodiment of the present invention;

[0030] Figure 2 This is a circuit architecture diagram of the analog power supply device in an embodiment of the present invention;

[0031] Figure 3 This is a circuit diagram of the DC-DC buck converter circuit in an embodiment of the present invention;

[0032] Figure 4 This is a structural block diagram of the charging and discharging control circuit in an embodiment of the present invention;

[0033] Figure 5 This is a circuit diagram of the charging and discharging control circuit in an embodiment of the present invention;

[0034] Figure 6 Is it like this? Figure 5 An enlarged diagram of the transmission line module in the image;

[0035] Figure 7 Is it like this? Figure 5 An enlarged diagram of the current control submodule;

[0036] Figure 8 Is it like this? Figure 5 An enlarged diagram of the voltage control submodule;

[0037] Figure 9 Is it like this? Figure 5 An enlarged diagram of the current sampling submodule in the image;

[0038] Figure 10 Is it like this? Figure 5 An enlarged diagram of the voltage sampling submodule;

[0039] Figure 11 Is it like this? Figure 5 An enlarged diagram of the microcurrent monitoring submodule;

[0040] Figure 12 Is it like this? Figure 5 An enlarged illustration of part A in the diagram;

[0041] Figure 13 This is a diagram illustrating the charging and discharging voltage and current range in one embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of the present invention shown in and described with reference to the drawings are merely exemplary, and the present invention is not limited to these embodiments.

[0043] It should be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of the present invention correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0044] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0045] This invention provides an analog power supply device, see below. Figure 1 and Figure 2The analog power supply device mainly includes a system power supply unit 100, an input / output unit 200, a control chip unit 300, and two transmission channels 400. Each transmission channel 400 includes a DC-DC buck converter circuit 401 and a charge / discharge control circuit 402 connected sequentially between the system power supply unit 100 and the input / output unit 200. The control chip unit 300 includes an MCU chip 301 and a data conversion chip 302 connected to each other. The input / output unit 200 is used to connect to the load under test 500 or a charging power supply 600.

[0046] The system power supply unit 100 provides input voltage to the DC-DC buck converter circuit 401 and also provides operating voltage to each component of the analog power supply device. The input / output unit 200 connects the charge / discharge control circuit 402 to the load under test 500 for discharge testing, or connects the charging power supply 600 to the charge / discharge control circuit 402 for charging testing.

[0047] The control chip unit 300 is connected to the DC-DC buck converter circuit 401 and the charge / discharge control circuit 402. The control chip unit 300 is used to send a first voltage setting signal to the DC-DC buck converter circuit 401 to configure its output voltage, and also to send a current setting signal and / or a second voltage setting signal to the charge / discharge control circuit 402 to configure its current and / or voltage during the charge / discharge phase.

[0048] The DC-DC step-down converter circuit 401 is used to convert the input voltage provided by the system power supply unit 100 into an output voltage based on the first voltage setting signal and input it to the charge and discharge control circuit 402 as a discharge power supply.

[0049] The charge / discharge control circuit 402 connects the discharge power provided by the DC-DC buck converter circuit 401 to the load under test 500 through the input / output unit 200 for discharge testing, or connects to the charging power supply 600 through the input / output unit 200 for charging testing. The charge / discharge control circuit 402 configures the current and / or voltage during the charge / discharge phase based on the current setting signal and / or the second voltage setting signal.

[0050] In this embodiment, as Figure 3As shown, the DC-DC buck converter circuit 401 includes an input module 11, a voltage conversion chip U1, an output module 12, a frequency selection acceleration module 13, and a voltage feedback control module 14. The voltage conversion chip U1 is connected to the system power supply unit 100 through the input module 11, and the voltage conversion chip U1 is connected to the charge / discharge control circuit 402 through the output module 12. The voltage conversion chip U1 converts the input voltage Vin provided by the system power supply unit 100 into an output voltage Vout, which is then input to the charge / discharge control circuit 402 as a discharge power source.

[0051] The voltage feedback control module 14 and the frequency selection acceleration module 13 are respectively connected between the output module 12 and the voltage conversion chip U1. The voltage feedback control module 14 is also connected to the control chip unit 300. The voltage feedback control module 14 generates a control signal based on the first voltage setting signal issued by the control chip unit 300 and the magnitude of the real-time output voltage Vout of the output module 12, and inputs it to the voltage conversion chip U1. The frequency selection acceleration module 13 feeds back the change information of the real-time output voltage Vout of the output module 13 to the voltage conversion chip U1.

[0052] The voltage conversion chip U1 controls the magnitude of the real-time output voltage Vout based on the control signal provided by the voltage feedback control module 14 and the information fed back by the frequency selection acceleration module 13, until the real-time output voltage Vout reaches the predetermined output voltage V. OA .

[0053] It should be noted that, as Figure 3 In this context, DC-DC-V-SET represents the first voltage setting signal sent by the control chip unit 300 to the DC-DC buck converter circuit 401, and DC-DC-OUT is the connection terminal between the DC-DC buck converter circuit 401 and the charge / discharge control circuit 402.

[0054] like Figure 3 In the above, the voltage conversion chip U1 mainly includes VIN pin, BOOT pin, PH pin, VSENSE pin and ENA pin.

[0055] The input module 11 is connected to the VIN pin and is used to input the input voltage Vin provided by the system power supply unit 100 to the voltage conversion chip U1. The input module 11 is provided with input filter capacitors C6, C7 and C8 of different capacitance values ​​to filter out ripple and noise of different frequencies and provide a high-quality power supply for the voltage conversion chip U1.

[0056] The output module 12 is connected to the PH pin, and a startup capacitor C1 is connected between the PH pin and the BOOT pin. In the output module 12, inductor L1 is a filtering and energy storage inductor, capacitors C2, C3, C4 and C5 are filtering capacitors, and diode D1 is a circulating Schottky diode. The inductor L1 and capacitors C2, C3, C4 and C5 form an LC filter network to filter the high-frequency switching waveform of the voltage conversion chip U1 into a stable DC voltage output.

[0057] The frequency selection acceleration module 3 includes a resistor R3, a capacitor C9, and a capacitor C10. The first end of resistor R3 is connected to the VSENSE pin, and the second end of resistor R3 is connected to the first end of capacitor C9. The second end of capacitor C9 is connected to the output terminal of the output module 12. The first end of capacitor C10 is connected to the first end of resistor R3, and the second end of capacitor C10 is connected to the second end of capacitor C9. As described above, the frequency selection acceleration module 13, composed of resistor R3, capacitor C9, and capacitor C10, forms an RC network that feeds back the change in output voltage Vout to the voltage conversion chip U1. This allows the voltage control loop to detect and respond to the output voltage change reflected on the VSENSE pin more quickly, thereby improving the dynamic response rate of the DC-DC buck converter circuit.

[0058] The voltage feedback control module 14 includes a voltage amplifier U2A and an error amplifier U2B.

[0059] Specifically, the first voltage setting signal issued by the control chip unit 300 is filtered by resistor R10 and capacitor C11 and then input to the non-inverting input of the voltage amplifier U2A. The voltage amplification circuit composed of voltage amplifier U2A and resistors R7 and R8 amplifies the first voltage setting signal and then inputs it to the inverting input of error amplifier U2B. The amplification factor of the first voltage setting signal needs to be set according to actual needs. In this embodiment, the voltage value corresponding to the first voltage setting signal is 0-2.5V, and voltage amplifier U2A amplifies it by 8 times to 0-20V.

[0060] Specifically, the non-inverting input of the error amplifier U2B is connected to the output module 12, and the output of the error amplifier U2B is connected to the VSENSE pin. The error amplifier circuit, composed of the error amplifier U2B, resistors R4, R31, R9, R39, R5, and capacitor C140, amplifies the real-time output voltage Vout against the amplified first voltage setting signal, generating a control signal that is input to the voltage conversion chip U1 for feedback voltage regulation. The diode D2 is a protection diode to prevent excessively high output voltage from the error amplifier from damaging the voltage conversion chip U1.

[0061] Furthermore, such as Figure 3 In the middle, resistors R1, R6, R2, transistor Q3, and light-emitting diode D... EN An enable indicator module 15 is formed to indicate whether the voltage conversion chip U1 is started.

[0062] As provided in the above embodiment, the DC-DC buck converter circuit 401 has a frequency selection acceleration module 13 and a voltage feedback control module 14 set between the VSENSE pin of the voltage conversion chip U1 and the output terminal of the output module 12, thereby improving the dynamic response rate of the DC-DC buck converter circuit 401 and the stability and accuracy of the output voltage.

[0063] In this embodiment, see Figure 4 and Figure 5 The charging and discharging control circuit 402 mainly includes a transmission line module 21, a current and voltage control module 22, and a current and voltage sampling module 23.

[0064] The transmission line module 21 is connected between the DC-DC buck converter circuit 401 and the input / output unit 200, and is used to connect the discharge power provided by the DC-DC buck converter circuit 401 to the load under test 500 through the input / output unit 200 for discharge testing, or to connect to the charging power supply 600 through the input / output unit 200 for charging testing.

[0065] The control chip unit 300 is connected to the current and voltage control module 22. The current setting signal and the second voltage setting signal issued by the control chip unit 300 are input to the current and voltage control module 22. The current and voltage sampling module 23 is connected between the transmission line module 21 and the current and voltage control module 22 and is connected to the control chip unit 300. It is used to acquire the sampling current and / or sampling voltage of the transmission line module 21 during the charging and discharging phase. The current and voltage control module 22 is connected to the transmission line module 21 and is used to control the charging and discharging current of the transmission line module 21 based on the current setting signal and the sampling current. It is also used to control the charging and discharging voltage of the transmission line module 21 based on the second voltage setting signal and the sampling voltage.

[0066] In this embodiment, the current and voltage control module 22 includes a current control submodule 221 and a voltage control submodule 222, and the current and voltage sampling module 23 includes a current sampling submodule 231 and a voltage sampling submodule 232. The current control submodule 221 and the voltage control submodule 222 are respectively connected to the control chip unit 300. The current sampling submodule 231 is connected between the transmission line module 21 and the current control submodule 221 and is connected to the control chip unit 300. The voltage sampling submodule 232 is connected between the transmission line module 21 and the voltage control submodule 222 and is connected to the control chip unit 300. The output terminals of the current control submodule 221 and the voltage control submodule 222 are respectively connected to the transmission line module 21.

[0067] Specifically, the current control submodule 221 controls the charging and discharging current of the transmission line module 21 based on the current setting signal issued by the control chip unit 300 and the sampled current acquired by the current sampling submodule 231. The voltage control submodule 222 controls the charging and discharging voltage of the transmission line module 21 based on the second voltage setting signal issued by the control chip unit 300 and the sampled voltage acquired by the voltage sampling submodule 232.

[0068] Furthermore, in this embodiment, the current and voltage sampling module 23 further includes a micro-current monitoring submodule 233, which is connected between the transmission line module 21 and the control chip unit 300. The micro-current monitoring submodule 233 samples the micro-current of the transmission line module 21 and feeds it back to the control chip unit 300.

[0069] In this embodiment, see Figure 6 and combined Figure 4 and Figure 5As shown, the transmission line module 21 mainly includes a discharge regulating transistor Q1, a charging regulating transistor Q2, a first current sampling resistor R23, a second current sampling resistor R24, and a first switch K1A. The input terminal of the discharge regulating transistor Q1 is connected to the output terminal of the DC-DC step-down converter circuit 401 to receive the discharge power. The output terminal of the discharge regulating transistor Q1 and the input terminal of the charging regulating transistor Q2 are interconnected and connected to the first terminal of the first current sampling resistor R23. The second terminal of the first current sampling resistor R23 is connected to the first terminal of the second current sampling resistor R24. The second terminal of the second current sampling resistor R24 ​​is connected to the input / output unit 200. The first switch K1A is connected between the first and second terminals of the second current sampling resistor R24. The output terminal of the charging regulating transistor Q2 is grounded. The control terminals of the discharge regulating transistor Q1 and the charging regulating transistor Q2 are respectively connected to the output terminal of the current-voltage control module 22. As a preferred embodiment, in this embodiment, the second terminal of the second current sampling resistor R24 ​​is connected to the input / output unit 200 through the second switch K2A and the corresponding connecting line.

[0070] It should be noted that, as Figure 6 In this circuit, DC-DC-OUT is the connection point between the transmission line module 21 and the DC-DC step-down converter circuit 401; P1 is the connection point between the transmission line module 21 and the current and voltage control module 22; P2 and P3 are the connection points between the transmission line module 21 and the current sampling submodule 231; P4 is the connection point between the transmission line module 21 and the voltage sampling submodule 232; P5 and P6 are the connection points between the transmission line module 21 and the micro-current monitoring submodule 233; and PWR-OUT-P and PWR-OUT-P are the connection points between the transmission line module 21 and the input / output unit 200.

[0071] in, Figure 6 In this circuit, resistor R25 is a bias resistor, providing static operating conditions for current and voltage adjustment. Resistors R28 and R30 are the connection resistors between the control terminals of the discharge regulating transistor Q1 and the charge regulating transistor Q2 and the current and voltage control module 2. Capacitors C149, C150, C151, C152, C153, and C154 are an array of capacitors of different materials and / or different capacities, used to improve the full-frequency quality of the output power supply. The second switch K2A is the power output / input control switch.

[0072] In the transmission line module 21 as described above:

[0073] (1) When the input / output unit 200 is connected to the load under test 500 and the first switch K1A is turned on, the discharge power supply provided by the DC-DC step-down converter circuit 401 is connected to the load under test 500 via the discharge adjustment tube Q1, the first current sampling resistor R23 and the first switch K1A. The transmission line module 21 is configured as a constant voltage discharge line or a constant current discharge line with the first current level.

[0074] (2) When the input / output unit 200 is connected to the load under test 500 and the first switch K1A is open, the discharge power provided by the DC-DC step-down converter circuit 401 is connected to the load under test 500 via the discharge adjustment tube Q1, the first current sampling resistor R23 and the second current sampling resistor R24, and the transmission line module 21 is configured as a discharge line with the second current.

[0075] (3) When the input / output unit 200 is connected to the charging power supply 600 and the first switch K1A is turned on, the charging power supply 600 is connected to the ground terminal via the first switch K1A, the first current sampling resistor R23 and the charging adjustment tube Q2, and the transmission line module 21 is configured as a constant voltage charging line or a constant current charging line with the first current level.

[0076] (4) When the input / output unit 200 is connected to the charging power supply 600 and the first switch K1A is off, the charging power supply 600 is connected to the ground terminal via the second current sampling resistor R24, the first current sampling resistor R23 and the charging adjustment tube Q2, and the transmission line module 21 can be configured as a charging line with the second current level.

[0077] In a preferred embodiment, the voltage range for charging and discharging of the transmission line module 21 is 0 to 20V, the current range of the first current level is -10A to 10A, and the current range of the second current level is -8mA to 8mA.

[0078] In this embodiment, as a preferred solution, such as Figure 6As shown, the discharge regulating transistor Q1 is a composite NPN transistor. The collector of Q1 serves as the input terminal, connected to the output terminal of the DC-DC step-down converter circuit 401 to receive the discharge power. The emitter of Q1 serves as the output terminal, connected to the first terminal of the first current sampling resistor R23. The base of Q1 serves as the control terminal, connected to the output terminal of the current-voltage control module 22. The charging regulating transistor Q2 is a composite PNP transistor. The emitter of Q2 serves as the input terminal, connected to the first terminal of the first current sampling resistor R23. The collector of Q2 serves as the output terminal, grounded. The base of Q2 serves as the control terminal, connected to the output terminal of the current-voltage control module 22.

[0079] In this embodiment, see Figure 7 and combined Figure 4 and Figure 5 As shown, the current control submodule 221 includes a first amplifier circuit, a subtraction circuit, a second amplifier circuit, and a first differential amplifier circuit connected in sequence.

[0080] Among them, such as Figure 7 As shown, the first amplifier circuit mainly includes operational amplifier U25A, resistors R124, R126, R35, and capacitor C35. The subtraction circuit mainly includes operational amplifier U25B, resistors R78, R79, R81, and R125. The second amplifier circuit mainly includes operational amplifier U4A, resistors R80, R40, R41, and capacitor C37. The first differential amplifier circuit mainly includes operational amplifier U4B, resistors R37 and R38, capacitors C38 and C39.

[0081] Among them, such as Figure 7 In this context, Current_SET represents the current setting signal issued by the control chip unit 300. P1 is the connection point between the current control submodule 221 and the transmission line module 21, corresponding to... Figure 6 P1 is the connection point in the diagram. P7 is the connection point between the current control submodule 221 and the current sampling submodule 231.

[0082] As described above, in the current control submodule 221, the control chip unit 300 inputs a first voltage value corresponding to the current setting signal Current_SET to the first amplifier circuit. The first amplifier circuit amplifies the first voltage value into a second voltage value and inputs it to the subtraction circuit. The subtraction circuit converts the second voltage value into a third voltage value and inputs it to the second amplifier circuit. The second amplifier circuit amplifies the third voltage value into a fourth voltage value and inputs it to the non-inverting input of the first differential amplifier circuit. The current sampling submodule 231 inputs a fifth voltage value corresponding to the sampled current to the inverting input of the first differential amplifier circuit. The first differential amplifier circuit generates a first control voltage signal based on the fourth voltage value and the fifth voltage value and outputs it to the control terminal of the discharge adjustment transistor Q1 or the control terminal of the charge adjustment transistor Q2, thereby controlling the charging and discharging current of the transmission line module 21.

[0083] Wherein, the range of the first voltage value is 0 to V1, the range of the second voltage value is 0 to V2, the range of the third voltage value is -V3 to V3, the range of the fourth voltage value is -V4 to V4, and the range of the fifth voltage value is -V4 to V4. <V1<V3<V2<V4。

[0084] As a preferred embodiment, in this case, the voltage value of the current setting signal Current_SET issued by the control chip unit 300 is 0–2.5V, that is, the range of the first voltage value is 0–2.5V. The first amplification circuit is a 2x amplification circuit, which amplifies the voltage of the Current_SET signal issued by the control chip unit 300 to 0–5V, that is, the range of the second voltage value is 0–5V. The subtraction circuit subtracts VREF-2.5V from the 0–5V signal input to the first amplification circuit, converting the Current_SET signal to -2.5V to 2.5V, that is, the range of the third voltage value is -2.5V to 2.5V. The second amplification circuit is a 4x amplification circuit. The second amplification circuit amplifies the -2.5V to 2.5V signal input by the subtraction circuit to -10V to 10V. The range of the fourth voltage value is -10V to 10V, which is roughly equivalent to the fifth voltage value corresponding to the sampling current. The current range it represents is -10A to 10A, which corresponds to the current range of the first level current for charging and discharging of the transmission line module 21.

[0085] In the current control submodule 221: when the fifth voltage value corresponding to the sampled current is greater than the fourth voltage value, the first differential amplifier circuit outputs a negative voltage signal to the control terminal of the regulating transistor, pulling down the base voltage of the regulating transistor, thereby reducing the transmission current of the transmission line module 21; when the fifth voltage value corresponding to the sampled current is less than the fourth voltage value, the first differential amplifier circuit outputs a positive voltage signal to the control terminal of the regulating transistor, raising the base voltage of the regulating transistor, thereby increasing the transmission current of the transmission line module 21. Based on the above current sampling closed-loop control process, until the sampled current (fifth voltage value) is equal to the current (fourth voltage value) represented by the current setting signal Current_SET, the transmission line module 21 performs constant current discharge or constant current charging with this current.

[0086] In this embodiment, as Figure 7 As shown, the first differential amplifier circuit is connected to the control terminal of the discharge regulating tube Q1 and the control terminal of the charge regulating tube Q2 through optocoupler switch U7 and diode D3.

[0087] In this embodiment, see Figure 8 and combined Figure 4 and Figure 5 As shown, the voltage control submodule 222 mainly includes a third amplifier circuit and a second differential amplifier circuit connected in sequence.

[0088] Among them, such as Figure 8 As shown, the third amplifier circuit mainly includes operational amplifier U5A, resistors R51, R52, R53, R46, capacitors C44 and C45. The second differential amplifier circuit mainly includes operational amplifier U5B, resistors R48, R49, R50, capacitors C46 and C47.

[0089] Among them, such as Figure 8 In this context, Voltage_SET represents the voltage setting signal issued by the control chip unit 300. P1 is the interconnection point between the voltage control submodule 222 and the transmission line module 21, corresponding to... Figure 6 P1 is the connection point in the diagram. P8 is the connection point between the current control submodule 221 and the voltage sampling submodule 232.

[0090] As described above, in the voltage control submodule 222, the control chip unit 300 inputs the sixth voltage value corresponding to the voltage setting signal Voltage_SET to the third amplifier circuit. The third amplifier circuit amplifies the sixth voltage value into a seventh voltage value and inputs it to the non-inverting input of the second differential amplifier circuit. The voltage sampling submodule 232 inputs the eighth voltage value corresponding to the sampled voltage to the inverting input of the second differential amplifier circuit. The second differential amplifier circuit generates a second control voltage signal based on the seventh voltage value and the eighth voltage value and outputs it to the control terminal of the discharge adjustment tube Q1 or the control terminal of the charge adjustment tube Q2, thereby controlling the charging and discharging voltage of the transmission line module 21.

[0091] The range of the sixth voltage value is 0 to V5, the range of the seventh voltage value is 0 to V6, and the range of the eighth voltage value is 0 to V6. <V5<V6。

[0092] As a preferred embodiment, in this case, the voltage value of the voltage setting signal Voltage_SET issued by the control chip unit 300 is 0–2.5V, that is, the range of the sixth voltage value is 0–2.5V. The third amplification circuit is an 8x amplification circuit, which amplifies the voltage of the Current_SET signal issued by the control chip unit 300 to 0–20V, that is, the range of the seventh voltage value is 0–20V, which is approximately equivalent to the eighth voltage value corresponding to the sampling voltage, representing a voltage range of 0–20V, corresponding to the voltage range for charging and discharging of the transmission line module 21.

[0093] Specifically, in the voltage control submodule 222: when the eighth voltage value corresponding to the sampled voltage is greater than the seventh voltage value, the second differential amplifier circuit outputs a negative voltage signal to the control terminal of the regulating transistor, pulling down the base voltage of the regulating transistor, thereby reducing the transmission voltage of the transmission line module 21; when the eighth voltage value corresponding to the sampled voltage is less than the seventh voltage value, the second differential amplifier circuit outputs a positive voltage signal to the control terminal of the regulating transistor, raising the base voltage of the regulating transistor, thereby increasing the transmission voltage of the transmission line module 21. Based on the above voltage sampling closed-loop control process, until the sampled voltage (eighth voltage value) is equal to the voltage represented by the voltage setting signal Voltage_SET (seventh voltage value), the transmission line module 21 performs constant voltage discharge or constant voltage charging with this voltage.

[0094] In this embodiment, as Figure 8 As shown, the second differential amplifier circuit is connected to the control terminal of the discharge regulating tube Q1 and the control terminal of the charge regulating tube Q2 through optocoupler switch U10 and diode D4.

[0095] In this embodiment, see Figure 9 and combined Figure 4 and Figure 5 As shown, the current sampling submodule 231 mainly includes a first instrumentation amplifier U6, the input terminal of the first instrumentation amplifier U6 is connected to the first current sampling resistor R23, and the output terminal of the first instrumentation amplifier U6 is connected to the current control submodule 221 and the control chip unit 300.

[0096] Among them, such as Figure 9 In the diagram, P2 and P3 are the interconnection points between the current sampling submodule 231 and the transmission line module 21, corresponding to... Figure 6 Connection points P2 and P3 in the diagram. P7 is the connection point between the current sampling submodule 231 and the current control submodule 221, corresponding to... Figure 7 The P7 connection point is used. CURR-RB-P and CURR-RB-N are the interconnection terminals between the current sampling submodule 231 and the control chip unit 300.

[0097] In the current sampling submodule 231: the first instrumentation amplifier U6, together with R13, R20, R14, R17, C24, C16, C20, C29, C31, FB4, and FB7, forms a current sampling amplification circuit. The sampling current is acquired and processed through the first current sampling resistor R23. The output signal of the first instrumentation amplifier U6 is split into two. One signal is transmitted to the first differential amplifier circuit in the current control submodule 221 for current closed-loop control. The other signal is transmitted to the control chip unit 300 through a π-type filter network composed of R15, R18, C21, C30, and C26, so that the control chip unit 300 can read the transmission current and current output curve of the circuit in real time for adjustment.

[0098] In this embodiment, see Figure 10 and combined Figure 4 , Figure 5 and Figure 8 As shown, the voltage sampling submodule 232 includes a second instrumentation amplifier U9 and a switching circuit. The second terminal of the second current sampling resistor R24 ​​in the transmission line module 21 is set as a near-end voltage sampling point, and the input / output unit 200 is set with a far-end voltage sampling point. The input terminal of the second instrumentation amplifier U9 is connected to the near-end voltage sampling point and the first terminal of the switching circuit, the second terminal of the switching circuit is connected to the far-end voltage sampling point, and the output terminal of the second instrumentation amplifier U9 is connected to the voltage control submodule 232 and the control chip unit 300. The switching circuit mainly includes an optocoupler switch U8 and an optocoupler switch U11.

[0099] Among them, such as Figure 8 and Figure 10 In the diagram, P4 is the connection point between the voltage sampling submodule 232 and the near-end voltage sampling point of the transmission line module 21, corresponding to... Figure 6 Connection point P4 in the diagram. P8 is the interconnection point between the voltage sampling submodule 232 and the voltage control submodule 222, corresponding to... Figure 8 The P8 connection point is used in the circuit. Sensor-P and Sensor-N are the interconnection terminals between the voltage sampling submodule 232 and the remote voltage sampling point, and Voltage-RB-P and Voltage-RB-N are the interconnection terminals between the voltage sampling submodule 232 and the control chip unit 300.

[0100] The switching circuit mainly includes optocoupler switch U8 and optocoupler switch U11. When the switching circuit is open, the second instrumentation amplifier U9 acquires the sampled voltage from the near-end voltage sampling point; when the switching circuit is on, the second instrumentation amplifier U9 acquires the sampled voltage from the far-end voltage sampling point to compensate for losses during the transmission of the far-end line; the second instrumentation amplifier U9 transmits the acquired sampled voltage to the voltage control submodule 222 and the control chip unit 300 respectively.

[0101] Specifically, in the voltage sampling submodule 232: the second instrumentation amplifier U9, together with R36, C34, FB8, C33, C36, FB9, C42, C43, R45, C41, C40, R42, and R43, constitutes a voltage sampling amplification circuit. This circuit acquires the sampled voltage from the near-end voltage sampling point or the far-end voltage sampling point, processes the sampled voltage, and then outputs it. Combined with... Figure 8 As shown, the output signal of the second instrumentation amplifier U9 is split into two. One signal is transmitted to the second differential amplifier circuit in the voltage control submodule 222 for voltage closed-loop control. The other signal is sent to the control chip unit 300 after being divided by resistors R54 and R55 in series and filtered by capacitor C48. The control chip unit 300 reads the transmission voltage and voltage output curve of the circuit in real time and adjusts it accordingly.

[0102] In this embodiment, see Figure 11 and combined Figure 4 and Figure 5As shown, the micro-current monitoring submodule 233 mainly includes a sampling chip U3. The current sampling signal acquired through the second current sampling resistor R24 ​​is sent to the micro-current acquisition circuit composed of sampling chip U3, C17, R21, and R22 via a π-type filter network composed of R16, R19, and C25. The sampling chip U3 is an ultra-precision 20-bit sampling ADC, which sends the micro-current data to the control chip unit 300 through the SPI / I2C interface, thereby accurately sampling weak currents at the μA level with a resolution as high as 0.0076μA.

[0103] Among them, such as Figure 11 In the diagram, P5 and P6 are the interconnection points between the micro-current monitoring submodule 233 and the transmission line module 21, corresponding to... Figure 6 Connection points P5 and P6 in the diagram.

[0104] Figure 12 This is an enlarged view of some control signal connection lines in the charge and discharge control circuit of this embodiment, wherein INA22x-CTRL and IO-Ctrl are connected to the control chip unit 300, respectively.

[0105] The charging and discharging control circuit 402 provided in the above embodiment:

[0106] When the transmission line module 21 is configured as a discharge line, the discharge power provided by the DC-DC step-down converter circuit 401 can be connected to the load under test 500 through the discharge adjustment tube Q1 to provide a test voltage to the load under test 500. It can operate in a programmable constant current source output mode, a programmable constant voltage source output mode, and a micro current output mode.

[0107] When the transmission line module 21 is configured as a charging line, the charging power supply 600 can be connected to the ground terminal through the charging adjustment tube Q2 to convert the input power of the charging power supply 600 into heat energy for consumption, simulating the charging process of the power supply. It can work in constant voltage charging mode, constant current charging mode or micro current charging mode.

[0108] In a specific case, see Figure 13 The charging and discharging control circuit 402 has a charging and discharging voltage range of 0 to 20V, a first current range of -10A to 10A, and a second current range of -8mA to 8mA.

[0109] Based on the above charging and discharging control circuit 402, the analog power supply device of this embodiment can realize bidirectional current flow, and the output voltage and current can be programmed to output dual-quadrant current, with a large adjustable dynamic range.

[0110] As a preferred embodiment, when the transmission line module 21 is configured as a discharge line and the required target discharge voltage is V OB At that time, the first voltage setting signal issued by the control chip unit 300 controls the predetermined output voltage V obtained by the DC-DC buck converter circuit 401. OA Compared to the target discharge voltage V OB Large ΔV, ΔV = 2V to 2.5V. For example, ΔV is set to 2V:

[0111] When the target discharge voltage of the transmission line module 21 is 5V, the first voltage setting signal sent by the control chip unit 300 makes the output voltage of the DC-DC step-down converter circuit 401 7V, and provides the 7V voltage to the transmission line module 21 as a discharge power supply.

[0112] When the target discharge voltage of the transmission line module 21 is 20V, the first voltage setting signal issued by the control chip unit 300 makes the output voltage of the DC-DC step-down converter circuit 401 22V, and provides the 22V voltage to the transmission line module 21 as a discharge power supply.

[0113] Therefore, in the analog power supply device provided by the present invention, the DC-DC buck converter circuit 401 efficiently reduces the input voltage to near the target output voltage value, reduces the heat generation of the subsequent stage (charge and discharge control circuit 402), and improves the working efficiency of the power supply.

[0114] Furthermore, in the analog power supply device provided in this embodiment of the invention, two transmission channels 400 are provided between the system power supply unit 100 and the input / output unit 200, and the two transmission channels 400 can be controlled independently. When the charge / discharge control circuit 402 in one of the transmission channels 400 is used for discharge testing, the charge / discharge control circuit 402 in the other transmission channel 400 can be used for charging testing or for discharge testing in different modes, thereby further improving the compatibility of the analog power supply device and enabling simultaneous testing of different test conditions.

[0115] In summary, the analog power supply device provided by the embodiments of the present invention includes a system power supply unit, an input / output unit, a control chip unit, and two transmission channels. Each transmission channel includes a DC-DC step-down converter circuit and a charge / discharge control circuit connected sequentially between the system power supply unit and the input / output unit. The transmission line module in the charge / discharge control circuit includes a discharge regulating transistor, a charge regulating transistor, a first current sampling resistor, a second current sampling resistor, and a first switch. This transmission line module can be configured as a constant voltage charge / discharge line, a constant current charge / discharge line with a first current level, and a charge / discharge line with a second current level. This increases the dynamic range of the analog power supply, making it suitable for testing different electronic products or different test conditions, improving the compatibility of the analog power supply, making the test equipment easier to maintain, and reducing test costs.

[0116] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An analog power supply device, characterized in that, The system includes a system power supply unit, an input / output unit, a control chip unit, and two transmission channels. Each transmission channel includes a DC-DC step-down converter circuit and a charge / discharge control circuit connected sequentially between the system power supply unit and the input / output unit. The charge / discharge control circuit includes a transmission line module, a current / voltage control module, and a current / voltage sampling module. The transmission line module is connected between the DC-DC step-down converter circuit and the input / output unit. The input / output unit is used to connect to the load under test or a charging power supply. The control chip unit is connected to the DC-DC buck converter circuit and the current and voltage control module. It is used to send a first voltage setting signal to the DC-DC buck converter circuit to configure the output voltage of the DC-DC buck converter circuit. It is also used to send a current setting signal and / or a second voltage setting signal to the current and / or voltage of the transmission line module during the charging and discharging phase. The DC-DC step-down converter circuit is used to convert the input voltage provided by the system power supply unit into an output voltage based on the first voltage setting signal and input it to the transmission line module as a discharge power supply. The current and voltage sampling module is connected between the transmission line module and the current and voltage control module and is connected to the control chip unit, and is used to acquire the sampling current and / or sampling voltage of the transmission line module during the charging and discharging phase. The current and voltage control module is connected to the transmission line module and is used to control the charging and discharging current of the transmission line module based on the current setting signal and the sampled current, and is also used to control the charging and discharging voltage of the transmission line module based on the second voltage setting signal and the sampled voltage. The transmission line module includes a discharge regulating transistor, a charging regulating transistor, a first current sampling resistor, a second current sampling resistor, and a first switch. The input terminal of the discharge regulating transistor is connected to the output terminal of the DC-DC buck converter circuit to receive discharge power. The output terminal of the discharge regulating transistor and the input terminal of the charging regulating transistor are interconnected and connected to the first terminal of the first current sampling resistor. The second terminal of the first current sampling resistor is connected to the first terminal of the second current sampling resistor. The second terminal of the second current sampling resistor is connected to the input / output unit. The first switch is connected between the first and second terminals of the second current sampling resistor. The output terminal of the charging regulating transistor is grounded. The control terminals of the discharge regulating transistor and the charging regulating transistor are respectively connected to the output terminal of the current-voltage control module.

2. The analog power supply device according to claim 1, characterized in that, When the input / output unit is connected to the load under test and the first switch is turned on, the discharge power provided by the DC-DC step-down converter circuit is connected to the load under test via the discharge regulating tube, the first current sampling resistor and the first switch. The transmission line module is configured as a constant voltage discharge line or a constant current discharge line with the first current level. When the input / output unit is connected to the load under test and the first switch is off, the discharge power supply provided by the DC-DC buck converter circuit is connected to the load under test via the discharge regulating tube, the first current sampling resistor and the second current sampling resistor, and the transmission line module is configured as a discharge line with the second current level. When the input / output unit is connected to the charging power supply and the first switch is turned on, the charging power supply is connected to the ground terminal via the first switch, the first current sampling resistor and the charging adjustment tube. The transmission line module can be configured as a constant voltage charging line or a constant current charging line with the first current level. When the input / output unit is connected to the charging power supply and the first switch is off, the charging power supply is connected to the ground terminal via the second current sampling resistor, the first current sampling resistor and the charging adjustment tube, and the transmission line module can be configured as a charging line with the second current level.

3. The analog power supply device according to claim 2, characterized in that, In the charging and discharging control circuit, the voltage range for charging and discharging of the transmission line module is 0 to 20V, the current range of the first current level is -10A to 10A, and the current range of the second current level is -8mA to 8mA.

4. The analog power supply device according to claim 2, characterized in that, The discharge regulating transistor is a composite NPN transistor. Its collector is connected as an input terminal to the output terminal of the DC-DC step-down converter circuit to receive the discharge power. Its emitter is connected as an output terminal to the first terminal of the first current sampling resistor. Its base is connected as a control terminal to the output terminal of the current-voltage control module. The charging regulating transistor is a composite PNP transistor. Its emitter is connected as an input terminal to the first terminal of the first current sampling resistor. Its collector is grounded as an output terminal. Its base is connected as a control terminal to the output terminal of the current-voltage control module.

5. The analog power supply device according to claim 2, characterized in that, The current and voltage control module includes a current control submodule and a voltage control submodule. The current and voltage sampling module includes a current sampling submodule and a voltage sampling submodule. The current control submodule and the voltage control submodule are respectively connected to the control chip unit. The current sampling submodule is connected between the transmission line module and the current control submodule and is connected to the control chip module. The voltage sampling submodule is connected between the transmission line module and the voltage control submodule and is connected to the control chip unit. The output terminal of the current control submodule is connected to the control terminal of the discharge regulating tube and the control terminal of the charge regulating tube. The output terminal of the voltage control submodule is connected to the control terminal of the discharge regulating tube and the control terminal of the charge regulating tube. The current control submodule controls the charging and discharging current of the transmission line module based on the current setting signal issued by the control chip unit and the sampled current acquired by the current sampling submodule; the voltage control submodule controls the charging and discharging voltage of the transmission line module based on the second voltage setting signal issued by the control chip unit and the sampled voltage acquired by the voltage sampling submodule.

6. The analog power supply device according to claim 5, characterized in that, The current control submodule includes a first amplifier circuit, a subtraction circuit, a second amplifier circuit, and a first differential amplifier circuit connected in sequence. The control chip unit inputs a first voltage value corresponding to the current setting signal to the first amplifier circuit. The first amplifier circuit amplifies the first voltage value into a second voltage value and inputs it to the subtraction circuit. The subtraction circuit converts the second voltage value into a third voltage value and inputs it to the second amplifier circuit. The second amplifier circuit amplifies the third voltage value into a fourth voltage value and inputs it to the non-inverting input of the first differential amplifier circuit. The current sampling submodule inputs a fifth voltage value corresponding to the sampled current to the inverting input of the first differential amplifier circuit. The first differential amplifier circuit generates a first control voltage signal based on the fourth voltage value and the fifth voltage value and outputs it to the control terminal of the discharge adjustment tube or the control terminal of the charge adjustment tube, thereby controlling the charging and discharging current of the transmission line module. Wherein, the range of the first voltage value is 0 to V1, the range of the second voltage value is 0 to V2, the range of the third voltage value is -V3 to V3, the range of the fourth voltage value is -V4 to V4, and the range of the fifth voltage value is -V4 to V4. <V1<V3<V2<V4。 7. The analog power supply device according to claim 5, characterized in that, The voltage control submodule includes a third amplifier circuit and a second differential amplifier circuit connected in sequence. The control chip unit inputs a sixth voltage value corresponding to the voltage setting signal to the third amplifier circuit. The third amplifier circuit amplifies the sixth voltage value into a seventh voltage value and inputs it to the non-inverting input of the second differential amplifier circuit. The voltage sampling submodule inputs an eighth voltage value corresponding to the sampled voltage to the inverting input of the second differential amplifier circuit. The second differential amplifier circuit generates a second control voltage signal based on the seventh voltage value and the eighth voltage value and outputs it to the control terminal of the discharge adjustment tube or the control terminal of the charge adjustment tube, thereby controlling the charging and discharging voltage of the transmission line module. The range of the sixth voltage value is 0 to V5, the range of the seventh voltage value is 0 to V6, and the range of the eighth voltage value is 0 to V6. <V5<V6。 8. The analog power supply device according to claim 5, characterized in that, The current sampling submodule includes a first instrumentation amplifier, the input terminal of which is connected to the first current sampling resistor, and the output terminal of which is connected to the current control submodule and the control chip module. The first instrumentation amplifier acquires the sampling current through the first current sampling resistor and transmits the sampling current to the current control submodule and the control chip unit respectively; In the transmission line module, the second end of the second current sampling resistor is set as a near-end voltage sampling point, and the input / output unit is set with a far-end voltage sampling point. The voltage sampling submodule includes a second instrumentation amplifier and a switching circuit. The input terminal of the second instrumentation amplifier is connected to the near-end voltage sampling point and the first terminal of the switching circuit, the second terminal of the switching circuit is connected to the far-end voltage sampling point, and the output terminal of the second instrumentation amplifier is connected to the voltage control submodule and the control chip unit. When the switching circuit is open, the second instrumentation amplifier acquires a sampling voltage from the near-end voltage sampling point; when the switching circuit is on, the second instrumentation amplifier acquires a sampling voltage from the far-end voltage sampling point. The second instrumentation amplifier transmits the acquired sampling voltage to the voltage control submodule and the control chip unit, respectively.

9. The analog power supply device according to claim 5, characterized in that, The current and voltage sampling module further includes a micro-current monitoring sub-module, which is connected between the second current sampling resistor and the control chip unit. The micro-current monitoring sub-module samples the micro-current through the second current sampling resistor and feeds it back to the control chip unit.

10. The analog power supply device according to any one of claims 1-9, characterized in that, The DC-DC buck converter circuit includes an input module, a voltage conversion chip, an output module, a frequency selection acceleration module, and a voltage feedback control module. The voltage conversion chip is connected to the system power supply unit through the input module and to the transmission line module through the output module. The voltage conversion chip converts the input voltage provided by the system power supply unit into an output voltage, which is then input to the transmission line module as a discharge power supply. The voltage feedback control module and the frequency selection acceleration module are respectively connected between the output module and the voltage conversion chip. The voltage feedback control module is also connected to the control chip unit. The voltage feedback control module generates a control signal based on the first voltage setting signal issued by the control chip unit and the magnitude of the real-time output voltage of the output module, and inputs it to the voltage conversion chip. The frequency selection acceleration module feeds back the real-time output voltage change information of the output module to the voltage conversion chip. The voltage conversion chip controls the magnitude of the real-time output voltage based on the control signal provided by the voltage feedback control module and the information fed back by the frequency selection acceleration module, until the real-time output voltage reaches the predetermined output voltage V. OA Wherein, when the transmission line module is configured as a discharge line and the required target discharge voltage is V OB At that time, the first voltage setting signal issued by the control chip unit will set the predetermined output voltage V. OA Configured to be higher than the target discharge voltage V OB Large ΔV, ΔV = 2V ~ 2.5V.

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