A power plant

Abstract

The embodiment of the application relates to the power technology field, and discloses a power device, which comprises at least two power modules connected in parallel to an output interface, wherein each power module comprises a control chip, a voltage adjustment module and an output balancing module; the first end of the voltage adjustment module is connected with the first end of the control chip and the first end of the output balancing module, the second end of the voltage adjustment module is connected with the second end of the control chip, the third end of the voltage adjustment module is connected with the first end of the control chip, and the fourth end of the voltage adjustment module is grounded; the second end of the balancing output module is connected with the output interface, and the third end of the balancing output module is grounded. By arranging the balancing output module between the output end of the current power module and the output interface, the power device can avoid the problem of causing the damage of components and the imbalance of device output caused by the charging of other power modules for the current power module when the output voltage of the current power module is low.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a power device. Background Technology

[0002] A Battery Elimination Circuit (BEC) power module can step down and regulate the voltage of a power battery (such as 12V or 24V) to a 5V or 6V DC output, specifically for powering low-power electronic devices such as receivers, flight controllers, and servos. Currently, most model aircraft, drones, robots, and unmanned vehicles use BEC power modules for power. The individual BEC power modules in existing model aircraft electronic speed controllers are designed to power 2-3 servos. If a larger model aircraft is equipped with 4 or more electronic speed controllers, requiring power to 7 or more servos, then the only way to meet the power output requirements is to connect the BEC power modules of 4 or more electronic speed controllers in parallel.

[0003] However, due to component errors, the output voltage of the BEC power module is not consistent, with a maximum error of about 0.4V. This causes the BEC power module with higher voltage to continuously charge the BEC power module with lower voltage, and the output power varies, which can lead to the burnout of the BEC power module circuit components. Utility Model Content

[0004] The embodiments of this application mainly provide a device for parallel output of power modules, which can avoid voltage backflow and output a balanced voltage when power modules are connected in parallel.

[0005] To solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions: In a first aspect, the present application provides a power device, including: at least two power modules, the at least two power modules being connected in parallel to the output interface, the power module including: a control chip, a voltage adjustment module and an output equalization module; The first terminal of the voltage adjustment module is connected to the first terminal of the control chip and the first terminal of the output equalization module. The second terminal of the voltage adjustment module is connected to the second terminal of the control chip. The third terminal of the voltage adjustment module is connected to the first terminal of the control chip. The fourth terminal of the voltage adjustment module is grounded. The voltage adjustment module is configured to adjust the output voltage of the power supply module. The second terminal of the output equalization module is connected to the output interface, and the third terminal of the output equalization module is grounded. The output equalization module is configured to equalize the output voltage.

[0006] In some embodiments, the output equalization module includes a first filter circuit and an equalization diode; The first terminal of the first filter circuit is connected to the first terminal of the voltage adjustment module and the first terminal of the equalization diode, respectively. The second terminal of the first filter circuit is grounded, and the second terminal of the equalization diode is connected to the output interface.

[0007] In some embodiments, the first filter circuit includes a first filter capacitor and a second filter capacitor; The first terminal of the first filter capacitor is connected to the first terminal of the voltage adjustment module and the first terminal of the second filter capacitor, respectively, and the second terminal of the first filter capacitor is grounded. The first terminal of the second filter capacitor is connected to the first terminal of the equalization diode, and the second terminal of the second filter capacitor is grounded.

[0008] In some embodiments, the device further includes a bootstrap charging module; The first end of the bootstrap charging module is connected to the first end of the control chip, the second end of the bootstrap charging module is connected to the third end of the control chip, the third end of the bootstrap charging module is connected to the fourth end of the control chip, and the fourth end of the bootstrap charging module is connected to the first end of the voltage adjustment module.

[0009] In some embodiments, the bootstrap charging module includes: a first resistor, a second resistor, a bootstrap capacitor, and a bootstrap inductor; The first end of the bootstrap inductor is connected to the first end of the control chip, and the second end of the bootstrap inductor is connected to the first end of the voltage adjustment module. The first end of the bootstrap capacitor is connected to the first end of the control chip and the first end of the bootstrap inductor, respectively; the second end of the bootstrap capacitor is connected to the first end of the first resistor and the first end of the second resistor, respectively. The second end of the first resistor is connected to the third end of the control chip, and the second end of the second resistor is connected to the fourth end of the control chip.

[0010] In some embodiments, the voltage adjustment module includes: a first voltage adjustment resistor, a second voltage adjustment resistor, a third voltage adjustment resistor, and a switching transistor; The first end of the first voltage adjustment resistor is connected to the second end of the bootstrap inductor and the first end of the output equalization module, and the second end of the first voltage adjustment resistor is connected to the first end of the second voltage adjustment resistor and the second end of the control chip. The collector of the switching transistor is connected to the second terminal of the second voltage adjustment resistor and the first terminal of the third voltage adjustment resistor, respectively. The base of the switching transistor is connected to the first terminal of the control chip, and the emitter of the switching transistor and the second terminal of the third voltage adjustment resistor are grounded.

[0011] In some embodiments, the device further includes an enable switch module; The enable switch module has its input terminal connected to an external power supply and its output terminal connected to the fifth terminal of the control chip. The enable switch module is configured to provide an enable signal to the control chip.

[0012] In some embodiments, the enable switch module includes: a first enable capacitor and a first enable resistor; The first terminal of the first enabling capacitor is connected to the external power supply and the first terminal of the first enabling resistor, respectively. The second terminal of the first enabling capacitor is grounded, and the second terminal of the first enabling resistor is connected to the fifth terminal of the control chip.

[0013] In some embodiments, the device further includes a filtering module; The first end of the filter module is connected to an external power supply, the second end of the filter module is connected to the input end of the enable switch module and the sixth end of the control chip, and the second end of the filter module is grounded.

[0014] In some embodiments, the filtering module includes a third filtering capacitor and a fourth filtering capacitor; The first terminal of the third filter capacitor is connected to the external power supply and the first terminal of the fourth filter capacitor, respectively, and the second terminal of the third filter capacitor is grounded. The first end of the fourth filter capacitor is connected to the input terminal of the enable switch module and the sixth terminal of the control chip, respectively, and the second end of the fourth filter capacitor is grounded.

[0015] The beneficial effects of this application's embodiments are as follows: Unlike existing technologies, this application provides a power device comprising at least two power modules connected in parallel to an output interface. Each power module includes a control chip, a voltage adjustment module, and an output balancing module. The first end of the voltage adjustment module is connected to the first end of the control chip and the first end of the output balancing module; the second end of the voltage adjustment module is connected to the second end of the control chip; the third end of the voltage adjustment module is connected to the first end of the control chip; and the fourth end of the voltage adjustment module is grounded. The voltage adjustment module is configured to adjust the output voltage of the power module. The second end of the output balancing module is connected to the output interface; the third end of the output balancing module is grounded. The output balancing module is configured to balance the output voltage. By providing voltage adjustment modules connected to the control chip and the output interface respectively, this application can adjust the output voltage according to the power requirements of the external load through the control chip. Simultaneously, by placing the output balancing module between the output end of the voltage adjustment module and the output interface, when the output voltage of the current power module is low, other power modules can compensate for the insufficient output voltage of the current power module, thereby maintaining a balanced total output voltage and providing stable power support for the external load. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure of a power device provided in an embodiment of this application; Figure 2 This is a partial structural schematic diagram of a power module provided in an embodiment of this application; Figure 3 This is a partial circuit diagram of a power module provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a power module provided in an embodiment of this application. Detailed Implementation

[0018] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] It should be noted that, unless there is a conflict, the various features in the embodiments of this application can be combined with each other, all of which are within the protection scope of this application. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than the module division in the device or the order in the flowchart. In addition, the terms "first," "second," and "third" used herein do not limit the data or execution order, but only distinguish identical or similar items with essentially the same function and effect.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0023] Because a single BEC power module has limited output power, it cannot power some devices with high power requirements. For example, a single BEC power module is designed to power 2-3 servos on a model aircraft. If a larger model aircraft is equipped with 4 or more electronic speed controllers, requiring power for 7 or more servos, then the only way to meet the power output requirements is to connect the BEC power modules for the 4 or more electronic speed controllers in parallel.

[0024] However, due to component errors, the output voltage of the BEC power module is not consistent, with a maximum error of about 0.4V. This causes the higher-voltage BEC power module to continuously charge the lower-voltage BEC power module, resulting in inconsistent output power and potentially burning out the circuit components of the BEC power module. Some technologies known to the inventors of this application, which use a separate external UBEC (Ultra Battery Elimination Circuit) device to power model aircraft with high power requirements, not only increase the production cost of the model aircraft but also increase its weight.

[0025] In view of this, this application provides a power unit 100, please refer to... Figure 1 and Figure 2 The circuit includes at least two power modules 200 (BEC power modules), which are connected in parallel to the output interface 300. Each power module 200 includes a control chip 210, a voltage adjustment module 220, and an output equalization module 230. The first terminal of the voltage adjustment module 220 is connected to the first terminal (pin 10) and the second terminal (pin 4) of the control chip 210, the third terminal of the voltage adjustment module 220 is connected to the first terminal of the control chip 210, and the fourth terminal of the voltage adjustment module 220 is grounded. The second terminal of the output equalization module 230 is connected in parallel with the output terminals of the other power modules to the input terminal of the output interface 300. The output terminal of the output interface 300 is connected to an external load 400, and the third terminal of the output equalization module 230 is grounded.

[0026] In some embodiments, please refer to Figure 3The output equalization module 230 includes a first filter circuit 231 and an equalization diode 232. The first terminal of the first filter circuit 231 is connected to the first terminal of the voltage adjustment module 220 and the first terminal of the equalization diode 232, respectively. The second terminal of the first filter circuit 231 is grounded. The second terminal of the equalization diode 232 is connected to the input terminal of the output interface 300. The first filter circuit 231 includes a first filter capacitor 231(a) and a second filter capacitor 231(b). The first terminal of the first filter capacitor 231(a) is connected to the first terminal of the voltage adjustment module 220 and the first terminal of the second filter capacitor 231(b), respectively. The second terminal of the first filter capacitor 231(a) is grounded. The first terminal of the second filter capacitor 231(b) is connected to the first terminal of the equalization diode 232, and the second terminal of the second filter capacitor 231(b) is grounded.

[0027] Understandably, the first filter circuit 231 is positioned between the voltage adjustment module 220 and the output interface 300. It filters the output voltage adjusted by the voltage adjustment module 220 and then combines it with the output voltages of other power modules connected in parallel, providing them together with the output voltages of the other power modules through the output interface 300 to the external load 400. This prevents noise or ripple caused by the voltage adjustment module 220 from affecting the external load 400. Simultaneously, when multiple power modules 200 are connected in parallel, due to component errors, there are corresponding errors in the output voltages of different power modules 200, with a maximum error of approximately 0.4V. Therefore, when power modules 200 are connected in parallel, a power module 200 with a higher output voltage may charge a power module 200 with a lower voltage, potentially causing damage to the circuit components of the charged power module 200.

[0028] Therefore, the output balancing module 230 is placed between the output terminal and the output interface of the current power module 200. By utilizing the unidirectional conductivity of the balancing diode 232, it prevents other power modules from supplying power to the current power module 200 through their output terminals when the output voltage of the current power module 200 is low, i.e., voltage reverse feeding. This protects the components of the power module 200 from damage in parallel output scenarios, and also ensures that when there are differences in the output voltages of multiple parallel power modules 200, the power module 200 with the higher output voltage increases the output voltage supplied to the external load 400, maintaining the balance of the overall output voltage, thereby providing a stable voltage to the external load 400.

[0029] In some embodiments, please refer to Figure 4The aforementioned power unit 100 also includes a bootstrap charging module 240. The first end of the bootstrap charging module 240 is connected to the first end (pin 10) of the control chip 210, the second end of the bootstrap charging module 240 is connected to the third end (pin 14) of the control chip 210, the third end of the bootstrap charging module 240 is connected to the fourth end (pin 13) of the control chip 210, and the fourth end of the bootstrap charging module 240 is connected to the first end of the voltage adjustment module 220. The internal circuit of the control chip 210 has a corresponding switch control circuit. The bootstrap charging module 240 can control the on / off state of this switch control circuit. In the event of an abnormal situation, the switch control circuit is disconnected, thereby protecting the components from damage.

[0030] In some embodiments, please refer to Figure 3 The bootstrap charging module 240 includes a first resistor 241, a second resistor 242, a bootstrap capacitor 243, and a bootstrap inductor 244. The first end of the bootstrap inductor 244 is connected to the first end (pin 10) of the control chip 210, and the second end of the bootstrap inductor 244 is connected to the first end of the voltage adjustment module 220. The first end of the bootstrap capacitor 243 is connected to both the first end of the control chip 210 and the first end of the bootstrap inductor 244, and the second end of the bootstrap capacitor 243 is connected to the first end of the first resistor 241 and the first end of the second resistor 242. The second end of the first resistor 241 is connected to the third end (pin 14) of the control chip 210, and the second end of the second resistor 242 is connected to the fourth end (pin 13) of the control chip 210. Figure 2 As shown, pin 14 of control chip 210 is the Charge-Bootstrap-Time (CBT) setting pin, and pin 13 of control chip 210 is the Restart-Battery-Threshold (RBT) pin. By connecting the first resistor 241 to pin 14 of the control chip 210 and the second resistor 242 to pin 13 of the control chip 210 using the above method, and using the relationship I=C·dV / dt, the resistance R of the first resistor 241 and the second resistor 242 is used to limit the charging current, thereby changing the time required for the fixed-capacity bootstrap capacitor 243 to charge from 0V to the target voltage V to τ≈R·C. Thus, changing R can linearly adjust the "bootstrap charging time" of the bootstrap charging module 240, thereby controlling the rise slope and startup timing of the gate drive of the internal switching transistor 224 of the control chip 210.

[0031] Please refer to it again. Figure 3The voltage adjustment module 220 includes: a first voltage adjustment resistor 221, a second voltage adjustment resistor 222, a third voltage adjustment resistor 223, and a switching transistor 224. The first terminal of the first voltage adjustment resistor 221 is connected to the second terminal of the bootstrap inductor 244 and the first terminal of the output equalization module 230, i.e., the first terminal of the first voltage adjustment resistor 221 is connected to the second terminal of the bootstrap inductor 244 and the first terminal of the first filter circuit 231. The second terminal of the first voltage adjustment resistor 221 is connected to the first terminal of the second voltage adjustment resistor 222 and the second terminal (pin 4) of the control chip 210. The collector of the switching transistor 224 is connected to the second terminal of the second voltage adjustment resistor 222 and the first terminal of the third voltage adjustment resistor, the base of the switching transistor 224 is connected to the first terminal (pin 10) of the control chip 210, and the emitter of the switching transistor 224 and the second terminal of the third voltage adjustment resistor 223 are grounded.

[0032] Pin 4 of the control chip 210 is the FB (Feedback) pin. Connecting the second terminal of the first voltage adjustment circuit to pin 4 of the control chip 210 allows the control chip 210 to acquire the voltage signal collected by the first voltage adjustment resistor 221. Based on the internal comparator circuit of the control chip 210, the voltage supplied to the base of the switching transistor 224 by pin 10 of the control chip 210 is adjusted, thereby controlling the on / off state of the switching transistor 224. When the switching transistor 224 is in the on state, no current flows through the third voltage adjustment resistor 223. At this time, only the first voltage adjustment resistor 221 and the second voltage adjustment resistor 222 perform voltage division, thus increasing the output voltage. When the switching transistor 224 is in the off state, current flows through the third voltage adjustment resistor 223. At this time, the first voltage adjustment resistor 221, the second voltage adjustment resistor 222, and the third voltage adjustment resistor 223 all perform voltage division, thus decreasing the output voltage.

[0033] A voltage adjustment module 220 is positioned between the control chip 210 and the output balancing module 230. The second terminal of the voltage adjustment module 220 is connected to the third terminal of the control chip 210, specifically its FB pin. The control chip 210 adjusts the output voltage of the voltage adjustment module 220 based on the output of its internal comparator circuit, providing power to the external load 400. Simultaneously, since the voltages of the multiple parallel power modules 200 are interconnected, the output balancing module 230 is connected between the output terminal and the output interface of the current power module 200. This prevents the current power module 200 from charging itself due to a lower output voltage compared to other power modules while the voltage adjustment module 220 outputs the adjusted voltage to power the external load 400. This allows the power module 200 to adjust its output voltage based on the power requirements of the external load 400 and the output voltages of other power modules, ensuring a stable voltage supply to the external load 400.

[0034] Please see Figure 3 and Figure 4 The power unit 100 also includes an enable switch module 250. The input terminal of the enable switch module 250 is connected to an external power supply 500, and the output terminal is connected to the fifth terminal (pin 7) of the control chip 210. The enable switch module 250 includes a first enable capacitor 251 and a first enable resistor 252. The first terminal of the first enable capacitor 251 is connected to both the external power supply 500 and the first terminal of the first enable resistor 252. The second terminal of the first enable capacitor 251 is grounded, and the second terminal of the first enable resistor 252 is connected to the fifth terminal of the control chip 210.

[0035] The above method connects the enable switch module 250 to the external power supply 500 and the control chip 210 respectively. Based on the electrical signal provided by the external power supply 500, a corresponding enable signal is generated and provided to the fifth terminal of the control chip 210, namely the enable pin 7 of the control chip 210. When the enable pin of the control chip 210 receives a high-level signal, the control chip 210 is awakened, and the internal reference, oscillator and driver stage are started in sequence, and the output voltage begins to rise.

[0036] Please refer to it again. Figure 3 and Figure 4The power unit 100 also includes a filter module 260. The first end of the filter module 260 is connected to an external power supply 500, and the second end of the filter module 260 is connected to the input terminal of the enable switch module 250 and the sixth terminal (pin 8 and pin 12) of the control chip 210. The second end of the filter module 260 is grounded. The filter module 260 includes a third filter capacitor 261 and a fourth filter capacitor 262. The first end of the third filter capacitor 261 is connected to both the external power supply 500 and the first end of the fourth filter capacitor 262, and the second end of the third filter capacitor 261 is grounded. The first end of the fourth filter capacitor 262 is connected to both the input terminal of the enable switch module 250 and the sixth terminal of the control chip 210, and the second end of the fourth filter capacitor 262 is grounded.

[0037] By placing the filter module 260, which consists of the third filter capacitor 261 and the fourth filter capacitor 262, between the external power supply 500 and the control chip 210, the electrical signal input from the external power supply 500 can be filtered to reduce interference such as power frequency ripple, switching noise or high frequency spikes from the external power supply 500. This attenuates the interference to within the range allowed by the control chip 210, preventing false triggering or logic disorder, and ensuring that the control chip 210 operates reliably under a clean and stable voltage.

[0038] Please refer to it again. Figure 3 The power supply parallel device 100 also includes a third resistor 270 and a fifth filter capacitor 280; the first end of the third resistor 270 is connected to the seventh terminal (pin 6) of the control chip 210, and the second end of the third resistor 270 is grounded; the first end of the fifth filter capacitor 280 is connected to the eighth terminal (pin 2) of the control chip 210, and the second end of the fifth filter capacitor 280 is grounded.

[0039] In summary, this application, by setting voltage adjustment modules connected to both the control chip and the output interface, enables the control chip to adjust the output voltage according to the power requirements of the external load. Simultaneously, by placing the output balancing module between the output of the voltage adjustment module and the connection interface, the unidirectional conductivity of the balancing diodes in the output balancing module prevents other power modules from charging the current power module when multiple power modules are connected in parallel to the output interface, and the output voltage of the current power module is slightly lower than that of the others. This avoids damage to components. Furthermore, it allows other power modules to compensate for the insufficient output voltage of the current power module, thus maintaining a balanced total output voltage and providing stable power support for the external load.

[0040] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power plant comprising: At least two power modules are connected in parallel to the output interface, characterized in that the power modules include: a control chip, a voltage adjustment module, and an output equalization module; The first terminal of the voltage adjustment module is connected to the first terminal of the control chip and the first terminal of the output equalization module, the second terminal of the voltage adjustment module is connected to the second terminal of the control chip, the third terminal of the voltage adjustment module is connected to the first terminal of the control chip, and the fourth terminal of the voltage adjustment module is grounded. The voltage adjustment module is configured to adjust the output voltage of the power supply module. The second terminal of the output equalization module is connected to the output interface, the third terminal of the output equalization module is grounded, and the output equalization module is configured to equalize the output voltage.

2. The power plant of claim 1, wherein, The output equalization module includes a first filter circuit and equalization diodes; The first terminal of the first filter circuit is connected to the first terminal of the voltage adjustment module and the first terminal of the equalization diode, the second terminal of the first filter circuit is grounded, and the second terminal of the equalization diode is connected to the output interface.

3. The apparatus of claim 2, wherein, The first filter circuit includes a first filter capacitor and a second filter capacitor; The first terminal of the first filter capacitor is connected to the first terminal of the voltage adjustment module and the first terminal of the second filter capacitor, respectively, and the second terminal of the first filter capacitor is grounded. The first terminal of the second filter capacitor is connected to the first terminal of the equalization diode, and the second terminal of the second filter capacitor is grounded.

4. The apparatus of claim 1, wherein, It also includes a bootstrap charging module; The first end of the bootstrap charging module is connected to the first end of the control chip, the second end of the bootstrap charging module is connected to the third end of the control chip, the third end of the bootstrap charging module is connected to the fourth end of the control chip, and the fourth end of the bootstrap charging module is connected to the first end of the voltage adjustment module.

5. The apparatus of claim 4, wherein, The bootstrap charging module includes: a first resistor, a second resistor, a bootstrap capacitor, and a bootstrap inductor; The first end of the bootstrap inductor is connected to the first end of the control chip, and the second end of the bootstrap inductor is connected to the first end of the voltage adjustment module; The first end of the bootstrap capacitor is connected to the first end of the control chip and the first end of the bootstrap inductor, respectively; the second end of the bootstrap capacitor is connected to the first end of the first resistor and the first end of the second resistor, respectively. The second end of the first resistor is connected to the third end of the control chip, and the second end of the second resistor is connected to the fourth end of the control chip.

6. The apparatus of claim 5, wherein, The voltage adjustment module includes: a first voltage adjustment resistor, a second voltage adjustment resistor, a third voltage adjustment resistor, and a switching transistor; The first end of the first voltage adjustment resistor is connected to the second end of the bootstrap inductor and the first end of the output equalization module, respectively; the second end of the first voltage adjustment resistor is connected to the first end of the second voltage adjustment resistor and the second end of the control chip, respectively. The collector of the switching transistor is connected to the second terminal of the second voltage adjustment resistor and the first terminal of the third voltage adjustment resistor, respectively. The base of the switching transistor is connected to the first terminal of the control chip. The emitter of the switching transistor and the second terminal of the third voltage adjustment resistor are grounded.

7. The apparatus of claim 1, wherein, It also includes an enable switch module; The input terminal of the enable switch module is connected to an external power supply, and the output terminal of the enable switch module is connected to the fifth terminal of the control chip. The enable switch module is configured to provide an enable signal to the control chip.

8. The apparatus of claim 7, wherein, The enable switch module includes: a first enable capacitor and a first enable resistor; The first terminal of the first enabling capacitor is connected to the external power supply and the first terminal of the first enabling resistor, respectively. The second terminal of the first enabling capacitor is grounded, and the second terminal of the first enabling resistor is connected to the fifth terminal of the control chip.

9. The apparatus of claim 7, wherein, It also includes a filtering module; The first end of the filter module is connected to the external power supply, the second end of the filter module is connected to the input end of the enable switch module and the sixth end of the control chip, and the second end of the filter module is grounded.

10. The apparatus of claim 9, wherein, The filtering module includes a third filtering capacitor and a fourth filtering capacitor; The first terminal of the third filter capacitor is connected to the external power supply and the first terminal of the fourth filter capacitor, respectively, and the second terminal of the third filter capacitor is grounded. The first end of the fourth filter capacitor is connected to the input terminal of the enable switch module and the sixth terminal of the control chip, respectively, and the second end of the fourth filter capacitor is grounded.

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