Power supply circuit and aging power supply board

Abstract

The utility model discloses a power supply circuit and system. The circuit comprises a voltage conversion module, a first filtering module, a second filtering module and an output module, the voltage conversion module and the second filtering module are connected with the first filtering module; the output module is connected with the second filtering module; wherein the output module comprises two or more than two pin headers and two or more than two USB (Universal Serial Bus) interfaces; the pin header and the USB interface are used for being connected with a power load. The circuit can be widely applied to the technical field of electronic circuits.

Description

Technical Field

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

[0002] In related technologies, many power modules can only support one load, and when these power modules use power chips for voltage conversion, they often use a fixed output voltage. During output, external interference can easily generate ripple or other interference signals, causing the originally fixed output voltage to become unstable. Therefore, there are still technical problems that need to be solved in related technologies. Utility Model Content

[0003] The purpose of this application is to at least partially solve one of the technical problems existing in the prior art.

[0004] Therefore, one objective of this application is to provide a power supply circuit and an aging power board, which can improve the stability of power output and enhance the practicality of power supply equipment.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted in the embodiments of this application includes: a power supply circuit, comprising: a voltage conversion module, a first filter module, a second filter module, and an output module;

[0006] The voltage conversion module and the second filtering module are connected to the first filtering module; the output module is connected to the second filtering module.

[0007] The output module includes two or more header pins and two or more USB interfaces; the header pins and the USB interfaces are used to connect to a power load.

[0008] In addition, the power supply circuit according to the above embodiments of this utility model may also have the following additional technical features:

[0009] Further, in this embodiment, the voltage conversion module includes a seventh resistor, an eighth resistor, a first capacitor, a power chip, and a feedback sub-circuit; the power chip includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal; wherein, an external power supply and one end of the first capacitor are connected to the fourth input terminal; the first input terminal, the first output terminal, and the second output terminal are connected to the feedback sub-circuit; one end of the seventh resistor is connected to the second input terminal; one end of the eighth resistor is connected to the third input terminal; the other ends of the seventh resistor, the eighth resistor, the first capacitor, the third output terminal, and the fourth output terminal are all grounded.

[0010] Further, in this embodiment, the feedback sub-circuit includes a first inductor, a sixth resistor, a ninth resistor, and a second capacitor; the first output terminal and the second output terminal are connected to one end of the first inductor; the other end of the first inductor and one end of the sixth resistor are connected to one end of the second capacitor; the other end of the second capacitor, the other end of the sixth resistor, and one end of the ninth resistor are connected to the first input terminal; the other end of the ninth resistor is grounded.

[0011] Furthermore, in this embodiment of the application, the first filtering module includes a third capacitor and a fourth capacitor; one end of the third capacitor and one end of the fourth capacitor are connected to the voltage conversion module, and the other ends of the third capacitor and the fourth capacitor are both grounded.

[0012] Furthermore, in this embodiment of the application, the second filtering module includes a first ferrite bead, a fifth capacitor, and a sixth capacitor; one end of the first ferrite bead is connected to the first filtering module; the other end of the first ferrite bead and one end of the fifth capacitor are connected to one end of the sixth capacitor; the other end of the fifth capacitor and the other end of the sixth capacitor are both grounded.

[0013] Furthermore, in this embodiment of the application, the output module further includes a resistor module and a display module; the display module is connected to the resistor module; two or more of the pin headers are connected to the display module; two or more of the USB interfaces are connected to the display module; two or more of the pin headers are connected to the resistor module; and two or more of the USB interfaces are connected to the resistor module.

[0014] Furthermore, in this embodiment, the resistor module includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; one end of the first resistor, one end of the second resistor, and one end of the third resistor are connected to the USB interface; one end of the fourth resistor, one end of the fifth resistor, and the other end of the third resistor are connected to the USB interface; the other ends of the second resistor and the fifth resistor are connected to the second filter module; and the other ends of the first resistor and the fourth resistor are both grounded.

[0015] Furthermore, in this embodiment of the application, the display module includes a light-emitting diode and a current-limiting resistor; the positive terminal of the light-emitting diode is connected to the second filter module; the negative terminal of the light-emitting diode is connected to one end of the current-limiting resistor; and the other end of the current-limiting resistor is grounded.

[0016] Furthermore, in this embodiment, the third resistor is a 0-ohm resistor.

[0017] On the other hand, this application also provides an aging power board, including two or more power circuits as described in any of the preceding claims.

[0018] The advantages and beneficial effects of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application:

[0019] This application can reduce interference from external ripple or other signals by designing two filtering modules between the voltage conversion module and the output module; at the same time, this application can carry two or more loads with different interfaces by using an output module including two or more pin headers and two or more USB interfaces, thereby improving the practicality of this application. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the power supply circuit in a specific embodiment of the present invention;

[0021] Figure 2 This is a circuit diagram of the power supply circuit in a specific embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the power supply circuit wiring in a specific embodiment of the present invention. Detailed Implementation

[0023] The following detailed description, in conjunction with the accompanying drawings, explains the principles and processes of the power supply circuit and aging power board in the embodiments of the present invention.

[0024] Reference Figure 1 This application provides a power supply circuit. The power supply circuit may include at least a voltage conversion module 1, a first filter module 2, a second filter module 3, and an output module 4. The voltage conversion module 1 and the second filter module 3 may be connected to the first filter module 2. The output module 4 may be connected to the second filter module 3. The output module 4 may include two or more pin headers and two or more USB interfaces. The pin headers may be used to connect to a power load. The USB interfaces may be used to connect to a power load.

[0025] It's understandable that a USB port can be used to power a mobile phone or tablet. Similarly, pin headers can be used to power a specific sub-module in a circuit, or a load such as a light bulb or motor.

[0026] Furthermore, referring to Figure 2In some feasible embodiments of this application, the voltage conversion module may include a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a power supply chip U1, and a feedback sub-circuit. The power supply chip U1 may include a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal. An external power supply and one end of the first capacitor C1 may be connected to the fourth input terminal. The first input terminal, the first output terminal, and the second output terminal may be connected to the feedback sub-circuit. One end of the seventh resistor R7 may be connected to the second input terminal. One end of the eighth resistor R8 may be connected to the third input terminal. The other ends of the seventh resistor R7, the eighth resistor R8, the first capacitor C1, the third output terminal, and the fourth output terminal may all be grounded.

[0027] In some other feasible embodiments, the first capacitor C1 may be an electrolytic capacitor. The positive terminal of the first capacitor C1 may be connected to the fourth input terminal. The negative terminal of the first capacitor C1 may be grounded.

[0028] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the feedback sub-circuit may include a first inductor L1, a sixth resistor R6, a ninth resistor R9, and a second capacitor C2. The first output terminal and the second output terminal of the power supply chip U1 may be connected to one end of the first inductor L1. The other end of the first inductor L1 and one end of the sixth resistor R6 may be connected to one end of the second capacitor C2. The other end of the second capacitor C2, the other end of the sixth resistor R6, and one end of the ninth resistor R9 may be connected to the first input terminal. The other end of the ninth resistor R9 may be grounded.

[0029] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the first filtering module may include a third capacitor C3 and a fourth capacitor C4; one end of the third capacitor C3 and one end of the fourth capacitor C4 may be connected to the voltage conversion module, and the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are both grounded.

[0030] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the second filtering module may include a first ferrite bead FB1, a fifth capacitor C5, and a sixth capacitor C6. One end of the first ferrite bead FB1 may be connected to the first filtering module. The other end of the first ferrite bead FB1 and one end of the fifth capacitor C5 may be connected to one end of the sixth capacitor C6. The other ends of the fifth capacitor C5 and the sixth capacitor C6 may both be grounded.

[0031] Furthermore, in some feasible embodiments of this application, the output module may further include a resistor module and a display module. The display module may be connected to the resistor module. Two or more header pins may be connected to the display module. Two or more USB ports may be connected to the display module. Two or more header pins may be connected to the resistor module. Two or more USB ports may be connected to the resistor module.

[0032] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the resistor module may include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. One end of the first resistor R1, one end of the second resistor R2, and one end of the third resistor R3 can be connected to a USB interface. One end of the fourth resistor R4, one end of the fifth resistor R5, and the other end of the third resistor R3 can be connected to a USB interface. The other ends of the second resistor R2 and the fifth resistor R5 can be connected to a second filter module. The other ends of the first resistor R1 and the fourth resistor R4 can both be grounded.

[0033] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the display module may include a light-emitting diode (LED) D1 and a current-limiting resistor R10. The positive terminal of the LED D1 is connected to the second filter module. The negative terminal of the LED D1 is connected to one end of the current-limiting resistor R10. The other end of the current-limiting resistor R10 is grounded.

[0034] Furthermore, referring to Figure 2 In some feasible embodiments of this application, the third resistor R3 may be a 0-ohm resistor.

[0035] This application features an over-temperature protection design for the power chip: the internal over-temperature protection circuit limits its total power consumption. When the power chip temperature rises to a specified level, the internal circuit shuts down the output to allow the power IC to cool down, preventing damage from overheating. The power chip has a built-in temperature sensor that monitors temperature changes in real time, and an internal over-temperature protection threshold is set. When the detected temperature exceeds this threshold, the protection mechanism is triggered.

[0036] This application features a power chip temperature protection design: after receiving an over-temperature signal, the power chip control circuit will take measures such as reducing output power, limiting current, and shutting down the power supply to prevent the temperature from rising further. Once the temperature drops to a safe range, the power chip can resume normal operation.

[0037] This application features a short-circuit protection design for the power chip: when a short circuit occurs at the output terminal of the power chip, the output current will increase sharply. The power chip determines whether a short circuit has occurred by detecting abnormal changes in the current or a sudden drop in the output voltage (detected by resistors R15 and R19).

[0038] This application features a short-circuit protection mechanism: upon the occurrence of a short circuit, the chip quickly shuts off its output to prevent damage to the chip and other circuit components from the short-circuit current. It continuously outputs a low-duty-cycle pulse signal to limit the short-circuit current until the short-circuit fault is cleared, at which point normal output resumes.

[0039] This application incorporates an overcurrent detection design: the chip compares the detected current signal with an internally set overcurrent threshold. When the current exceeds the threshold, an overcurrent condition is determined. Once an overcurrent is detected, the chip immediately takes protective measures, such as reducing the output current, lowering the output voltage, or shutting off the output, to prevent circuit damage due to overcurrent.

[0040] In summary, this application employs a circuit architecture with one input and multiple outputs, which saves space temporarily occupied by the power supply on the aging rack. Furthermore, this application achieves a conversion efficiency of up to 93%, reducing heat generation. In addition, this application provides stable voltage and current outputs and includes short-circuit, overcurrent, and overtemperature protection functions, effectively protecting products being aged or currently charging.

[0041] On the other hand, this application also provides an aging power board, including two or more power circuits of any of the preceding embodiments. Specifically, see [link to application details]. Figure 3 The aging power board may include any four or more power circuits. Each power circuit shares the same input. The power board can simultaneously connect to multiple power-related load circuits or load modules.

[0042] It should be noted that the contents of the above power circuit embodiments are all applicable to this aging power board embodiment. The specific functions implemented by this aging power board embodiment are the same as those of the above power circuit embodiments, and the beneficial effects achieved are also the same as those achieved by the above power circuit embodiments.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "switching" should be interpreted broadly, for example, it can mean transformation or conversion; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0044] In this specification, the description of referenced terms refers to a specific structure or feature described in connection with an embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

[0046] The above is a detailed description of the preferred embodiments of this application, but this application is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A power supply circuit, characterized in that, include: The system includes a voltage conversion module, a first filter module, a second filter module, and an output module. The voltage conversion module and the second filtering module are connected to the first filtering module; the output module is connected to the second filtering module. The output module includes two or more header pins and two or more USB interfaces; both the header pins and the USB interfaces are used to connect to the power load.

2. The power supply circuit according to claim 1, characterized in that, The voltage conversion module includes a seventh resistor, an eighth resistor, a first capacitor, a power chip, and a feedback sub-circuit. The power chip includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal. An external power supply and one end of the first capacitor are connected to the fourth input terminal. The first input terminal, the first output terminal, and the second output terminal are connected to the feedback sub-circuit. One end of the seventh resistor is connected to the second input terminal. One end of the eighth resistor is connected to the third input terminal. The other ends of the seventh resistor, the eighth resistor, the first capacitor, the third output terminal, and the fourth output terminal are all grounded.

3. The power supply circuit according to claim 2, characterized in that, The feedback sub-circuit includes a first inductor, a sixth resistor, a ninth resistor, and a second capacitor; the first output terminal and the second output terminal are connected to one end of the first inductor; the other end of the first inductor and one end of the sixth resistor are connected to one end of the second capacitor; the other end of the second capacitor, the other end of the sixth resistor, and one end of the ninth resistor are connected to the first input terminal; the other end of the ninth resistor is grounded.

4. The power supply circuit according to claim 1, characterized in that, The first filtering module includes a third capacitor and a fourth capacitor; one end of the third capacitor and one end of the fourth capacitor are connected to the voltage conversion module, and the other ends of the third capacitor and the fourth capacitor are both grounded.

5. The power supply circuit according to claim 1, characterized in that, The second filtering module includes a first ferrite bead, a fifth capacitor, and a sixth capacitor; one end of the first ferrite bead is connected to the first filtering module; the other end of the first ferrite bead and one end of the fifth capacitor are connected to one end of the sixth capacitor; the other end of the fifth capacitor and the other end of the sixth capacitor are both grounded.

6. The power supply circuit according to claim 1, characterized in that, The output module further includes a resistor module and a display module; the display module is connected to the resistor module; two or more of the pin headers are connected to the display module; two or more of the USB interfaces are connected to the display module; two or more of the pin headers are connected to the resistor module; and two or more of the USB interfaces are connected to the resistor module.

7. The power supply circuit according to claim 6, characterized in that, The resistor module includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; one end of the first resistor, one end of the second resistor, and one end of the third resistor are connected to the USB interface; one end of the fourth resistor, one end of the fifth resistor, and the other end of the third resistor are connected to the USB interface; the other ends of the second resistor and the other ends of the fifth resistor are connected to the second filter module; the other ends of the first resistor and the other ends of the fourth resistor are both grounded.

8. The power supply circuit according to claim 6, characterized in that, The display module includes a light-emitting diode (LED) and a current-limiting resistor; the positive terminal of the LED is connected to the second filter module; the negative terminal of the LED is connected to one end of the current-limiting resistor; and the other end of the current-limiting resistor is grounded.

9. The power supply circuit according to claim 7, characterized in that, The third resistor is a 0-ohm resistor.

10. An aging power supply board, characterized in that, It includes two or more power supply circuits as described in any one of claims 1-9.

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