Redundant power supply module

Abstract

The utility model relates to a redundant power supply module. The redundant power supply module comprises a main control chip and a switching unit, the switching unit comprises a first power supply sub-unit and a second power supply sub-unit, the first power supply sub-unit comprises a first access port and a first power supply circuit, the first access port is electrically connected with the main control chip, the first power supply circuit is electrically connected with the first access port, and the second access port is electrically connected with the second power supply circuit. The second power supply sub-unit comprises a second access port and a second power supply circuit, the second access port is electrically connected with the main control chip, and the second power supply circuit is electrically connected with the second access port.

Description

Technical Field

[0001] This utility model relates to the field of circuit design technology, and in particular to a redundant power supply module. Background Technology

[0002] Current smart products all have built-in power supplies to ensure their normal operation. However, in related technologies, most smart products use a single power source, meaning that if the power supply fails, the smart product cannot continue to function. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a redundant power supply module that can provide two power supplies in intelligent products for easy switching.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] The first aspect of this application provides a redundant power supply module, including: a main control chip; a switching unit, including a first power supply unit and a second power supply unit, wherein the first power supply unit includes a first input port and a first power supply circuit, the first input port is electrically connected to the main control chip, and the first power supply circuit is electrically connected to the first input port; the second power supply unit includes a second input port and a second power supply circuit, the second input port is electrically connected to the main control chip, and the second power supply circuit is electrically connected to the second input port.

[0006] The first power supply circuit includes resistor R18, resistor R19 and capacitor C6. The first end of resistor R18 is electrically connected to the first input port. The second end of resistor R18 is electrically connected to the first end of resistor R19 and the first end of capacitor C6. The second end of resistor R19 is electrically connected to the second end of capacitor C6.

[0007] The first power supply circuit also includes a transistor Q2 and a resistor R17. The first end of the transistor Q2 is electrically connected to the first end of the capacitor C6, and the second end of the transistor Q2 is electrically connected to the first end of the resistor R17.

[0008] The first power supply circuit further includes resistors R16 and R15. The first end of resistor R16 is electrically connected to the second end of resistor R17, and the first end of resistor R15 is electrically connected to the second end of resistor R17.

[0009] The first power supply circuit further includes MOSFET Q1, MOSFET Q16, diode D9, diode D27, and a first output interface. MOSFET Q1 is electrically connected to the second end of resistor R15 and the second end of resistor R16, respectively. MOSFET Q16 is electrically connected to MOSFET Q1. The first end of diode D9 is electrically connected to MOSFET Q1. The second end of diode D9 is electrically connected to diode D27. The first output interface is electrically connected to MOSFET Q1.

[0010] The second power supply circuit includes resistor R68, resistor R69 and capacitor C26. The first end of resistor R68 is electrically connected to the second input port. The second end of resistor R68 is electrically connected to the first end of resistor R69 and the first end of capacitor C26. The second end of resistor R69 is electrically connected to the second end of capacitor C26.

[0011] The second power supply circuit also includes a transistor Q12 and a resistor R67. The first end of the transistor Q12 is electrically connected to the first end of the capacitor C26, and the second end of the transistor Q12 is electrically connected to the first end of the resistor R67.

[0012] The second power supply circuit also includes resistors R65 and R64. The first end of resistor R65 is electrically connected to the second end of resistor R67, and the first end of resistor R64 is electrically connected to the second end of resistor R67.

[0013] The second power supply circuit also includes MOSFET Q11, MOSFET Q17, diode D24, and diode D28. MOSFET Q11 is electrically connected to the second terminal of resistor R64 and the second terminal of resistor R65, respectively. MOSFET Q17 is electrically connected to MOSFET Q11. The first terminal of diode D24 is electrically connected to MOSFET Q11, and the second terminal of diode D24 is electrically connected to diode D28.

[0014] The second power supply circuit also includes a second output interface, which is electrically connected to the MOSFET Q11.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] By setting up a first power supply unit and a second power supply unit, the intelligent product is equipped with two power supplies. When one power supply fails or loses power, the main control chip can drive the remaining power supply to maintain the normal operation of the intelligent product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 This is a functional block diagram of the redundant power supply module in one embodiment of the present invention;

[0019] Figure 2 This is a circuit diagram of the main control chip in one embodiment of the present invention;

[0020] Figure 3 This is a circuit diagram of the first electron supply unit in one embodiment of the present invention;

[0021] Figure 4 This is a circuit diagram of the second electron supply unit in one embodiment of the present invention. Detailed Implementation

[0022] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Current smart products all have built-in power supplies to ensure their normal operation. However, in related technologies, most smart products use a single power source, meaning that if the power supply fails, the smart product cannot continue to function.

[0026] To address the aforementioned issues, this application provides a redundant power module that can provide two power sources within an intelligent product for easy switching.

[0027] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0028] Please see Figure 1 and Figure 2 A redundant power supply module includes: a main control chip 100 and a switching unit 200. The switching unit 200 includes a first power supply unit 210 and a second power supply unit 220. The first power supply unit 210 includes a first input port and a first power circuit. The first input port is electrically connected to the main control chip 100, and the first power circuit is electrically connected to the first input port. The second power supply unit 220 includes a second input port and a second power circuit. The second input port is electrically connected to the main control chip 100, and the second power circuit is electrically connected to the second input port.

[0029] It should be noted that by setting up the first power supply unit 210 and the second power supply unit 220, the intelligent product is equipped with two power supplies. When one power supply fails or loses power, the main control chip U5 can drive the remaining power supply to maintain the normal operation of the intelligent product. Furthermore, the first input is NET-4, the second input is NET-6, and the main control chip 100 is U5.

[0030] Please see Figure 3 In one embodiment, the first power supply circuit includes a resistor R18, a resistor R19, and a capacitor C6. The first end of the resistor R18 is electrically connected to the first input port, the second end of the resistor R18 is electrically connected to the first end of the resistor R19 and the first end of the capacitor C6, and the second end of the resistor R19 is electrically connected to the second end of the capacitor C6.

[0031] It should be noted that resistors R18 and R19 are voltage divider resistors, and capacitor C6 is a filter capacitor.

[0032] Please see Figure 1 In one embodiment, the first power supply circuit further includes a transistor Q2 and a resistor R17. The first terminal of the transistor Q2 is electrically connected to the first terminal of the capacitor C6, and the second terminal of the transistor Q2 is electrically connected to the first terminal of the resistor R17.

[0033] It should be noted that transistor Q2 acts as a switch, and resistor R17 is a voltage divider resistor.

[0034] Please see Figure 3In one embodiment, the first power supply circuit further includes resistors R16 and R15, with the first end of resistor R16 electrically connected to the second end of resistor R17, and the first end of resistor R15 electrically connected to the second end of resistor R17.

[0035] It should be noted that resistor R16 is a voltage divider resistor and resistor R15 is a current limiting resistor.

[0036] Please see Figure 3 In one embodiment, the first power supply circuit further includes MOSFET Q1, MOSFET Q16, diode D9, diode D27 and a first output interface. MOSFET Q1 is electrically connected to the second end of resistor R15 and the second end of resistor R16, respectively. MOSFET Q16 is electrically connected to MOSFET Q1. The first end of diode D9 is electrically connected to MOSFET Q1. The second end of diode D9 is electrically connected to diode D27. The first output interface is electrically connected to MOSFET Q1.

[0037] It should be noted that the first output interface is VOUT-A.

[0038] Please see Figure 4 In one embodiment, the second power supply circuit includes resistor R68, resistor R69 and capacitor C26. The first end of resistor R68 is electrically connected to the second input port, the second end of resistor R68 is electrically connected to the first end of resistor R69 and the first end of capacitor C26, and the second end of resistor R69 is electrically connected to the second end of capacitor C26.

[0039] It should be noted that resistors R68 and R69 are voltage divider resistors, and capacitor C26 is a filter capacitor.

[0040] Please see Figure 4 In one embodiment, the second power supply circuit further includes a transistor Q12 and a resistor R67. The first terminal of the transistor Q12 is electrically connected to the first terminal of the capacitor C26, and the second terminal of the transistor Q12 is electrically connected to the first terminal of the resistor R67.

[0041] It should be noted that resistor R67 is a voltage divider resistor, and transistor Q12 acts as a switch.

[0042] Please see Figure 4In one embodiment, the second power supply circuit further includes resistors R65 and R64. The first terminal of resistor R65 is electrically connected to the second terminal of resistor R67, and the first terminal of resistor R64 is electrically connected to the second terminal of resistor R67. Specifically, the second power supply circuit also includes MOSFETs Q11 and Q17, diodes D24 and D28. MOSFET Q11 is electrically connected to the second terminals of both resistors R64 and R65. MOSFET Q17 is electrically connected to MOSFET Q11. The first terminal of diode D24 is electrically connected to MOSFET Q11, and the second terminal of diode D24 is electrically connected to diode D28. Specifically, the second power supply circuit also includes a second output interface, which is electrically connected to MOSFET Q11.

[0043] It should be noted that resistor R65 is a voltage divider resistor, resistor R64 is a current limiting resistor, and the second output interface is VOUT-B.

[0044] The circuit principle of this application is explained below:

[0045] First, the voltages of the first and second output interfaces are adjusted to be the same. When it is necessary to actively switch the power supply unit, the main control chip U5 sends high and low potentials to either the first or second input interface. For example, when the first power supply unit needs power, the main control chip U5 sends a high potential to the first input interface, thereby turning on MOSFETs Q1 and Q16. This is equivalent to short-circuiting diodes D9 and D27, making the voltage of +V1 approximately the same as the voltage of the first output interface. Then, the main control chip U5 sends a low potential to the second input interface, turning off MOSFETs Q11 and Q17. At this time, the voltage of the second output interface can only be transmitted to +V1 through diodes D24 and D28. Due to the forward voltage drop characteristic of diodes, the voltage of the second output interface, after passing through diodes D24 and D28, is lower than the voltage of the first output interface, thus enabling power supply to the first power supply unit. The same principle applies when the second power supply unit needs power.

[0046] If one of the power supply units malfunctions and fails to output power, that power supply unit will be shut down, and another power supply unit will be turned on. For example, when the first power supply unit is supplying power and a switch to the second power supply unit is required, the main control chip U5 will apply a low potential to the first input, causing MOSFETs Q1 and Q16 to turn off. Then, a high potential will be applied to the second input, causing MOSFETs Q11 and Q17 to turn on. During the time between the cutoff of MOSFETs Q1 and Q16 and the turn-on of MOSFETs Q11 and Q17, seamless switching is achieved through the freewheeling current of diodes D9 and D27. Passive switching works similarly; when the first output interface malfunctions, the main control chip U5 will apply a low potential to the first input, causing MOSFETs Q1 and Q16 to turn off. Then, a high potential is applied to the second input to turn on MOSFETs Q11 and Q17. During the period from when MOSFETs Q1 and Q16 are cut off to when MOSFETs Q11 and Q17 are turned on, the freewheeling current of diodes D24 and D28 is used to achieve uninterrupted switching.

[0047] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0048] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A redundant power supply module, characterized in that, include: Main control chip; The switching unit includes a first power supply unit and a second power supply unit. The first power supply unit includes a first input port and a first power supply circuit. The first input port is electrically connected to the main control chip, and the first power supply circuit is electrically connected to the first input port. The second power supply unit includes a second input port and a second power supply circuit. The second input port is electrically connected to the main control chip, and the second power supply circuit is electrically connected to the second input port.

2. The redundant power supply module according to claim 1, characterized in that, The first power supply circuit includes resistor R18, resistor R19 and capacitor C6. The first end of resistor R18 is electrically connected to the first input port. The second end of resistor R18 is electrically connected to the first end of resistor R19 and the first end of capacitor C6. The second end of resistor R19 is electrically connected to the second end of capacitor C6.

3. The redundant power supply module according to claim 2, characterized in that, The first power supply circuit also includes a transistor Q2 and a resistor R17. The first end of the transistor Q2 is electrically connected to the first end of the capacitor C6, and the second end of the transistor Q2 is electrically connected to the first end of the resistor R17.

4. The redundant power supply module according to claim 3, characterized in that, The first power supply circuit further includes resistors R16 and R15. The first end of resistor R16 is electrically connected to the second end of resistor R17, and the first end of resistor R15 is electrically connected to the second end of resistor R17.

5. The redundant power supply module according to claim 4, characterized in that, The first power supply circuit further includes MOSFET Q1, MOSFET Q16, diode D9, diode D27, and a first output interface. MOSFET Q1 is electrically connected to the second end of resistor R15 and the second end of resistor R16, respectively. MOSFET Q16 is electrically connected to MOSFET Q1. The first end of diode D9 is electrically connected to MOSFET Q1. The second end of diode D9 is electrically connected to diode D27. The first output interface is electrically connected to MOSFET Q1.

6. The redundant power supply module according to claim 1, characterized in that, The second power supply circuit includes resistor R68, resistor R69 and capacitor C26. The first end of resistor R68 is electrically connected to the second input port. The second end of resistor R68 is electrically connected to the first end of resistor R69 and the first end of capacitor C26. The second end of resistor R69 is electrically connected to the second end of capacitor C26.

7. The redundant power supply module according to claim 6, characterized in that, The second power supply circuit also includes a transistor Q12 and a resistor R67. The first end of the transistor Q12 is electrically connected to the first end of the capacitor C26, and the second end of the transistor Q12 is electrically connected to the first end of the resistor R67.

8. The redundant power supply module according to claim 7, characterized in that, The second power supply circuit also includes resistors R65 and R64. The first end of resistor R65 is electrically connected to the second end of resistor R67, and the first end of resistor R64 is electrically connected to the second end of resistor R67.

9. The redundant power supply module according to claim 8, characterized in that, The second power supply circuit also includes MOSFET Q11, MOSFET Q17, diode D24, and diode D28. MOSFET Q11 is electrically connected to the second terminal of resistor R64 and the second terminal of resistor R65, respectively. MOSFET Q17 is electrically connected to MOSFET Q11. The first terminal of diode D24 is electrically connected to MOSFET Q11, and the second terminal of diode D24 is electrically connected to diode D28.

10. The redundant power supply module according to claim 9, characterized in that, The second power supply circuit also includes a second output interface, which is electrically connected to the MOSFET Q11.

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