DC-DC power supply module and power supply equipment

Abstract

The utility model discloses a DC-DC power supply module and power supply equipment, and belongs to the technical field of power supplies. Comprising at least one functional circuit, the functional circuit is connected with an installation interface, and the functional circuit comprises a power supply input interface, an input overcurrent protector, an anti-reverse connection circuit, an input indication circuit, an anti-surge circuit, a pi-type input filter circuit, a power supply module, a pi-type output filter circuit, an output overcurrent protector, an output indication circuit and a power supply output interface. Voltage values of various values can be output, and generalization, serialization and combination are achieved; the over-current protector can sensitively and quickly realize a fuse protection function; the anti-reverse connection circuit can prevent the DC-DC power supply module from being damaged due to input positive and negative reverse connection caused by wiring errors; the anti-surge circuit can prevent the circuit from being damaged by abnormal fluctuation of input voltage or high-voltage pulse at the moment of access, and eliminates the impact of spike pulse.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a DC-DC power supply module and a power supply device. Background Art

[0002] The power module is an indispensable part of modern electronic equipment, but different application scenarios require different output voltage values. For example, common voltage values ​​are: ±24V, ±15V, ±12V, ±5V, +3.3V, etc. This makes it difficult to achieve universal design of power modules during equipment development. Power modules must be designed separately during the development process, wasting manpower, material resources, and financial resources. In the development of modern electronic equipment, the requirements for universal, serialized, and combined designs are becoming increasingly higher. How to achieve universal, serialized, and combined designs of power modules has become an urgent problem to be solved in the field of electronic equipment research and development. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a DC-DC power supply module and a power supply device.

[0004] The purpose of the utility model is achieved through the following technical solutions: The first aspect of the utility model provides: a DC-DC power supply module, comprising at least one functional circuit, the functional circuit is connected to the installation interface, the functional circuit comprises a power input interface, an input overcurrent protector, an anti-reverse connection circuit, an input indication circuit, an anti-surge circuit, a π-type input filter circuit, a power module, a π-type output filter circuit, an output overcurrent protector, an output indication circuit and a power output interface; the power input interface is connected to the input overcurrent protector, the input overcurrent protector is connected to the anti-reverse connection circuit, the anti-reverse connection circuit is connected to the input indication circuit, the input indication circuit is connected to the anti-surge circuit, the anti-surge circuit is connected to the π-type input filter circuit, the π-type input filter circuit is connected to the power module, the power module is connected to the π-type output filter circuit and the installation interface, the π-type output filter circuit is connected to the output overcurrent protector, the output overcurrent protector is connected to the output indication circuit, and the output indication circuit is connected to the power output interface; the power module comprises a voltage converter, a second bypass capacitor CE2, a third bypass capacitor CE3, a fourth bypass capacitor CE4, a second resistor R2, a fourth resistor R4, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9; the positive electrode of the second bypass capacitor CE2 is connected to the π-type input filter circuit and the first end of the second resistor R2, and the negative electrode of the second bypass capacitor CE2 is connected to the GND end of the voltage converter and the first end of the ninth resistor R9; the first end of the second resistor R2 is connected to the Vin end of the voltage converter, and the second end of the second resistor R2 is connected to the CTRL end of the voltage converter; the +Vo end of the voltage converter is connected to the positive electrode of the third bypass capacitor CE3, and the Tr of the voltage converter is connected to the positive electrode of the third bypass capacitor CE3. The im end is connected to the first end of the fourth resistor R4, and the -Vo end of the voltage converter is connected to the first ends of the seventh resistor R7 and the eighth resistor R8; the positive electrode of the third bypass capacitor CE3 is connected to the π-type output filter circuit, and the negative electrode of the third bypass capacitor CE3 is connected to the positive electrode of the fourth bypass capacitor CE4, the π-type output filter circuit, the second end of the fourth resistor R4 and the second end of the seventh resistor R7; the negative electrode of the fourth bypass capacitor CE4 is connected to the π-type output filter circuit, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the ninth resistor R9 and the installation interface.

[0005] Preferably, the installation interface includes a tenth resistor R10, a nineteenth resistor R19, a twenty-first resistor R21, a first installation hole position SP1, a second installation hole position SP2, a third installation hole position SP3 and a fourth installation hole position SP4; the first end of the tenth resistor R10 is connected to the second ends of the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the first end of the nineteenth resistor R19 and the negative electrode of the fourth bypass capacitor CE4, and the second end of the tenth resistor R10 is connected to the first end of the twenty-first resistor R21; the second end of the nineteenth resistor R19 is connected to the second end of the twenty-first resistor R21, the first installation hole position SP1, the second installation hole position SP2, the third installation hole position SP3 and the fourth installation hole position SP4.

[0006] Preferably, the input overcurrent protector is a second overcurrent protector F2, and the anti-reverse connection circuit is a first diode D1; the first end of the second overcurrent protector F2 is connected to the power input interface, and the second end of the second overcurrent protector F2 is connected to the positive electrode of the first diode D1; the negative electrode of the first diode D1 is connected to the input indication circuit and the surge protection circuit.

[0007] Preferably, the input indication circuit includes a fifth resistor R5 and a second indicator LED2, the first end of the fifth resistor R5 is connected to the anti-reverse connection circuit, the second end of the fifth resistor R5 is connected to the positive electrode of the second indicator LED2; the negative electrode of the second indicator LED2 is connected to the power input interface.

[0008] Preferably, the surge protection circuit includes a surge protector R3 and a first bypass capacitor CE1, the first end of the surge protector R3 is connected to the input indication circuit, the anti-reverse connection circuit and the positive electrode of the first bypass capacitor CE1, and the second end of the surge protector R3 is connected to the power input interface and the negative electrode of the first bypass capacitor CE1; the positive and negative electrodes of the first bypass capacitor CE1 are connected to the π-type input filter circuit.

[0009] Preferably, the π-type input filter circuit includes a first capacitor C1, a third capacitor C3 and a first inductor L1; the first end of the third capacitor C3 is connected to the surge protection circuit and the first end of the first inductor L1, and the second end of the third capacitor C3 is connected to the surge protection circuit and the second end of the first capacitor C1; the second end of the first inductor L1 is connected to the first end of the first capacitor C1; the first end of the first capacitor C1 is connected to the positive electrode of the second bypass capacitor CE2, and the second end of the first capacitor C1 is connected to the negative electrode of the second bypass capacitor CE2.

[0010] Preferably, the π-type output filter circuit includes a second capacitor C2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a second inductor L2, and a third inductor L3; the first end of the fourth capacitor C4 is connected to the first end of the second inductor L2 and the positive electrode of the third bypass capacitor CE3, the second end of the fourth capacitor C4 is connected to the negative electrode of the third bypass capacitor CE3, the positive electrode of the fourth bypass capacitor CE4, the first end of the fifth capacitor C5, the second end of the second capacitor C2 and the first end of the sixth capacitor C6; the second end of the fifth capacitor is connected to the negative electrode of the fourth bypass capacitor CE4 and the first end of the third inductor L3; the first end of the second capacitor C2 is connected to the second end of the second inductor L2 and the output overcurrent protector, and the second end of the second capacitor C2 is connected to the output indication circuit; the second end of the sixth capacitor C6 is connected to the second end of the third inductor L3 and the output overcurrent protector.

[0011] Preferably, the output overcurrent protector includes a first overcurrent protector F1 and a third overcurrent protector F3; the first end of the first overcurrent protector F1 is connected to the first end of the second capacitor C2, and the second end of the first overcurrent protector F1 is connected to the output indication circuit; the first end of the third overcurrent protector F3 is connected to the second end of the sixth capacitor C6, and the second end of the third overcurrent protector F3 is connected to the output indication circuit.

[0012] Preferably, the output indication circuit includes a first resistor R1, a sixth resistor R6, a first indicator LED1 and a third indicator LED3; the first end of the first resistor R1 is connected to the second end of the first overcurrent protector F1 and the power output interface, and the second end of the first resistor R1 is connected to the positive electrode of the first indicator LED1; the negative electrode of the first indicator LED1 is connected to the power output interface, the second end of the second capacitor C2, the first end of the sixth capacitor C6 and the positive electrode of the third indicator LED3; the negative electrode of the third indicator LED3 is connected to the first end of the sixth resistor R6; the second end of the sixth resistor R6 is connected to the power output interface and the second end of the third overcurrent protector F3.

[0013] The second aspect of the utility model provides: a power supply device, comprising any one of the above-mentioned DC-DC power supply modules.

[0014] The beneficial effects of the utility model are:

[0015] 1) It can output voltage values ​​of various values ​​to achieve universalization, serialization and combination; the overcurrent protector can sensitively and quickly realize the fuse protection function; the anti-reverse connection circuit can avoid wiring errors, resulting in reverse connection of the input positive and negative to damage the DC-DC power supply module.

[0016] 2) The surge protection circuit can prevent abnormal fluctuations in input voltage or high voltage pulses at the moment of access from damaging the circuit and eliminate the impact of spike pulses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the principle block diagram of the DC-DC power supply module;

[0018] Figure 2 This is the schematic diagram of the DC-DC power supply module circuit;

[0019] Figure 3 The top 3D view of the DC-DC power module PCB board;

[0020] Figure 4 This is the bottom 3D view of the DC-DC power module PCB board. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4The first aspect of the utility model provides: a DC-DC power supply module, comprising at least one functional circuit, the functional circuit is connected to the installation interface, the functional circuit comprises a power input interface, an input overcurrent protector, an anti-reverse connection circuit, an input indication circuit, an anti-surge circuit, a π-type input filter circuit, a power module, a π-type output filter circuit, an output overcurrent protector, an output indication circuit and a power output interface; the power input interface is connected to the input overcurrent protector, the input overcurrent protector is connected to the anti-reverse connection circuit, the anti-reverse connection circuit is connected to the input indication circuit, the input indication circuit is connected to the anti-surge circuit, the anti-surge circuit is connected to the π-type input filter circuit, the π-type input filter circuit is connected to the power module, the power module is connected to the π-type output filter circuit and the installation interface, the π-type output filter circuit is connected to the output overcurrent protector, the output overcurrent protector is connected to the output indication circuit, and the output indication circuit is connected to the power output interface; the power module comprises a voltage converter, a second bypass capacitor CE2, a third bypass capacitor CE3, a fourth bypass capacitor CE4, a second resistor R2, a fourth resistor R4 , the seventh resistor R7, the eighth resistor R8 and the ninth resistor R9; the positive electrode of the second bypass capacitor CE2 is connected to the π-type input filter circuit and the first end of the second resistor R2, and the negative electrode of the second bypass capacitor CE2 is connected to the GND end of the voltage converter and the first end of the ninth resistor R9; the first end of the second resistor R2 is connected to the Vin end of the voltage converter, and the second end of the second resistor R2 is connected to the CTRL end of the voltage converter; the +Vo end of the voltage converter is connected to the positive electrode of the third bypass capacitor CE3, the Trim end of the voltage converter is connected to the first end of the fourth resistor R4, and the -Vo end of the voltage converter is connected to the first end of the seventh resistor R7 and the eighth resistor R8; the positive electrode of the third bypass capacitor CE3 is connected to the π-type output filter circuit, and the negative electrode of the third bypass capacitor CE3 is connected to the positive electrode of the fourth bypass capacitor CE4, the π-type output filter circuit, the second end of the fourth resistor R4 and the second end of the seventh resistor R7; the negative electrode of the fourth bypass capacitor CE4 is connected to the π-type output filter circuit, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the ninth resistor R9 and the installation interface.

[0023] In this embodiment, the DC-DC power module is a secondary development application based on a plug-in voltage converter with a package length and width of 25.4mm*25.4mm on the market. It is suitable for all applications of this packaged voltage converter commonly found on the market and has very strong practicality. The DC-DC power module contains two independent and completely identical functional circuits, and the principles and applicability are completely consistent. The voltage converter is the core of the power module, and the voltage conversion is mainly performed in the voltage converter, and the remaining peripheral circuits are mainly enhanced. The applicability, reliability, and stability of the DC-DC power module. The voltage converter is packaged as a plug-in voltage converter with a length and width of 25.4mm*25.4mm. Major power module manufacturers at home and abroad have finished voltage converters in this package form, and the pin definitions between them are basically the same, with very strong interchangeability. Domestic power module manufacturers are also a major choice for this power module, with very strong localization substitutability. Foreign manufacturers include: ArtesynEmbedded Technologies, Cincon, CUI Inc, Flex, etc., and domestic manufacturers include: Guangzhou Nengda Power Supply, Shenzhen Hailingke, Guangzhou Jinshengyang Power Supply, etc.

[0024] In some embodiments, the mounting interface includes a tenth resistor R10, a nineteenth resistor R19, a twenty-first resistor R21, a first mounting hole position SP1, a second mounting hole position SP2, a third mounting hole position SP3 and a fourth mounting hole position SP4; the first end of the tenth resistor R10 is connected to the second ends of the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the first end of the nineteenth resistor R19 and the negative electrode of the fourth bypass capacitor CE4, and the second end of the tenth resistor R10 is connected to the first end of the twenty-first resistor R21; the second end of the nineteenth resistor R19 is connected to the second end of the twenty-first resistor R21, the first mounting hole position SP1, the second mounting hole position SP2, the third mounting hole position SP3 and the fourth mounting hole position SP4.

[0025] In some embodiments, the input overcurrent protector is a second overcurrent protector F2, and the anti-reverse connection circuit is a first diode D1; the first end of the second overcurrent protector F2 is connected to the power input interface, and the second end of the second overcurrent protector F2 is connected to the positive electrode of the first diode D1; the negative electrode of the first diode D1 is connected to the input indication circuit and the surge protection circuit.

[0026] In this embodiment, in order to protect the safety of various components inside the DC-DC power module and the external power input power supply, the DC-DC power module is designed with an input overcurrent protection device, which is a single-chip one-time fuse, based on the design of input +24V and output of 20W. According to the data manual of the voltage converter of each manufacturer, under this input and output condition, the conversion efficiency is above 85%. The fuse in this circuit is selected as 1A, which can sensitively and quickly realize the fuse protection function under the condition of meeting the design requirements. Note: The selection of the overcurrent protector needs to be selected in combination with the input voltage, output power, and conversion efficiency. In order to protect the DC-DC power module from damage caused by reverse connection of the input positive and negative due to incorrect wiring during use, a Schottky diode is used to form an anti-reverse connection circuit. The Schottky diode has the characteristics of small voltage drop (usually between 0.15V and 0.45V) and large reverse leakage current, which is very suitable for anti-reverse connection design. Based on the actual application scenario and a certain margin design, the DC-DC power module selects SS34 Schottky diodes to form an anti-reverse connection circuit, and the maximum forward conduction current can reach 3A.

[0027] In some embodiments, the input indication circuit includes a fifth resistor R5 and a second indicator LED2, the first end of the fifth resistor R5 is connected to the anti-reverse connection circuit, the second end of the fifth resistor R5 is connected to the positive electrode of the second indicator LED2; the negative electrode of the second indicator LED2 is connected to the power input interface.

[0028] In this embodiment, in order to indicate the power input status of the DC-DC power supply module, an independent input indication circuit is specially designed to indicate the power input status. When the external power supply is connected, the red power indicator light is on to indicate; when the external power supply is not connected, the red power indicator light is off.

[0029] In some embodiments, the surge protection circuit includes a surge protector R3 and a first bypass capacitor CE1, the first end of the surge protector R3 is connected to the input indication circuit, the anti-reverse connection circuit and the positive electrode of the first bypass capacitor CE1, and the second end of the surge protector R3 is connected to the power input interface and the negative electrode of the first bypass capacitor CE1; the positive and negative electrodes of the first bypass capacitor CE1 are connected to the π-type input filter circuit.

[0030] In this embodiment, in order to prevent abnormal fluctuations in input voltage or high voltage pulses at the moment of access from damaging the circuit, a surge protection circuit is specially designed to eliminate the impact of spike pulses. Based on the voltage converter input voltage range of 9V to 36V, a 14D470K varistor is selected here to form a surge protection circuit, which can meet the use requirements.

[0031] In some embodiments, the π-type input filter circuit includes a first capacitor C1, a third capacitor C3 and a first inductor L1; the first end of the third capacitor C3 is connected to the surge protection circuit and the first end of the first inductor L1, and the second end of the third capacitor C3 is connected to the surge protection circuit and the second end of the first capacitor C1; the second end of the first inductor L1 is connected to the first end of the first capacitor C1; the first end of the first capacitor C1 is connected to the positive electrode of the second bypass capacitor CE2, and the second end of the first capacitor C1 is connected to the negative electrode of the second bypass capacitor CE2.

[0032] In this embodiment, in order to prevent high-frequency noise interference from the external power supply and also to prevent high-frequency conversion pulses inside the voltage converter from interfering with the external power supply, a π-type input filter circuit is designed for bidirectional filtering. Based on the internal switch conversion frequency of the voltage converter, the appropriate capacitance and inductance values ​​need to be selected through calculation.

[0033] In some embodiments, the π-type output filter circuit includes a second capacitor C2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a second inductor L2, and a third inductor L3; the first end of the fourth capacitor C4 is connected to the first end of the second inductor L2 and the positive electrode of the third bypass capacitor CE3, the second end of the fourth capacitor C4 is connected to the negative electrode of the third bypass capacitor CE3, the positive electrode of the fourth bypass capacitor CE4, the first end of the fifth capacitor C5, the second end of the second capacitor C2, and the first end of the sixth capacitor C6; the second end of the fifth capacitor is connected to the negative electrode of the fourth bypass capacitor CE4 and the first end of the third inductor L3; the first end of the second capacitor C2 is connected to the second end of the second inductor L2 and the output overcurrent protector, and the second end of the second capacitor C2 is connected to the output indication circuit; the second end of the sixth capacitor C6 is connected to the second end of the third inductor L3 and the output overcurrent protector.

[0034] In this embodiment, in order to prevent noise interference generated by external power units and also to prevent high-frequency conversion pulses inside the voltage converter from interfering with external power consumption, a π-type input filter circuit is designed for both positive and negative output channels to perform bidirectional filtering. The positive voltage filter circuit includes a second capacitor C2, a fourth capacitor C4, and a second inductor L2, and the negative voltage filter circuit includes a fifth capacitor C5, a sixth capacitor C6, and a third inductor L3. Based on the internal switch conversion frequency of the voltage converter, appropriate capacitor and inductor values ​​need to be selected through calculation.

[0035] In some embodiments, the output overcurrent protector includes a first overcurrent protector F1 and a third overcurrent protector F3; the first end of the first overcurrent protector F1 is connected to the first end of the second capacitor C2, and the second end of the first overcurrent protector F1 is connected to the output indication circuit; the first end of the third overcurrent protector F3 is connected to the second end of the sixth capacitor C6, and the second end of the third overcurrent protector F3 is connected to the output indication circuit.

[0036] In this embodiment, in order to protect the safety of internal components and prevent damage to internal components due to output overload, overcurrent protectors are provided for both positive and negative output channels. According to the voltage converter data sheet, when the output power is 20W and the output voltage is ±5V, the maximum load capacity of the positive and negative output groups is 2A. Therefore, the output fuses of the two channels are selected to be 2A, which can quickly and sensitively realize the fuse protection function while meeting the design requirements.

[0037] In some embodiments, the output indication circuit includes a first resistor R1, a sixth resistor R6, a first indicator LED1 and a third indicator LED3; the first end of the first resistor R1 is connected to the second end of the first overcurrent protector F1 and the power output interface, and the second end of the first resistor R1 is connected to the positive electrode of the first indicator LED1; the negative electrode of the first indicator LED1 is connected to the power output interface, the second end of the second capacitor C2, the first end of the sixth capacitor C6 and the positive electrode of the third indicator LED3; the negative electrode of the third indicator LED3 is connected to the first end of the sixth resistor R6; the second end of the sixth resistor R6 is connected to the power output interface and the second end of the third overcurrent protector F3.

[0038] In this embodiment, in order to ensure the indication of the voltage output status of the DC-DC power supply module, two independent output indication circuits are specially designed to indicate the voltage output status. When the voltage is output externally, the red power indicator light is on to indicate; when the voltage is not output normally, the red power indicator light is off.

[0039] In some embodiments, the input ground and output ground of each channel are isolated from each other, and an isolated power supply output can be provided to the outside. If input and output isolation is not required, short-circuiting can be performed by welding shorting resistors R9 or R20, which is very flexible and convenient. The output grounds of the two channels are also isolated from each other. The entire DC-DC power supply module can provide two sets of isolated single or dual outputs to the outside. If isolation of the two outputs is not required, short-circuiting can be performed by welding shorting resistors R10, which is very flexible and convenient. The mounting hole is designed for copper column installation. The four pads are interconnected by printed wires, but are physically isolated from the two output grounds of the DC-DC power supply module. If common ground is required, the GND common ground of output 1 or output 2 can be achieved by welding R19 or R21. When there are special needs for some common grounds, a separate casing common ground can be provided. The pin definitions of single-channel and dual-channel voltage converters on the market are not exactly the same. For example, the pin definitions of single-channel and dual-channel power modules of CUI Inc. are different, mainly in the ground of the output end. In the case of single-channel, the output GND is pin 6, and pin 5 is the adjustment end. In the case of dual-channel output, pin 5 is GND and pin 6 is the negative voltage output. The DC-DC power module adopts the resistor jumper method. In the case of single-channel output, the R4 and R8 resistors are not connected, the R7 resistor is welded, and the 6th pin is connected to the output GND; in the case of dual-channel output, the R4 and R8 resistors are welded, the R7 resistor is not connected, the 5th pin is connected to the output GND, and the 6th pin is connected to the output negative voltage end.

[0040] The DC-DC power module is designed as an independent PCB board with an external size of 50mm*100mm. The input and output interfaces use screw terminals with a pitch of 5.08mm.

[0041] The DC-DC power supply module contains two groups of completely identical functional circuits, each of which is divided into single-channel output and dual-channel output according to the selected voltage converter. The voltage values ​​that can be output by each group of functional circuits are ±24V, ±15V, ±12V, ±5V, +24V, +15V, +12V, +5V, +3.3V and other uncommon voltage values ​​(domestic power supply modules can support customized voltage values). The two groups of functional circuits can be matched into two groups of single-channel, one group of single-channel and one group of dual-channel, two groups of dual-channel output and other combinations. In the actual application process, according to the functional requirements, the appropriate output voltage and power are selected. The two groups of functional circuits are matched with each other, which can basically meet most application scenarios. It is also compatible with the direct-insert voltage converter with an input voltage range of >40V on the market and a package of 25.4mm*25.4mm in length and width. At this time, it is necessary to re-select the anti-reverse diode, varistor, filter capacitor (mainly capacitor withstand voltage value), current limiting resistor, etc. in the circuit according to the input and output voltage values, which can provide an application environment in a larger input voltage range. The DC-DC voltage converter can also be replaced with an AC-DC voltage converter, the anti-reverse connection diode and π-type filter inductor can be replaced with a 0R resistor, and the filter capacitor at the input end of the voltage converter is not installed. The AC-DC voltage conversion function can be realized based on this power module.

[0042] The second aspect of the utility model provides: a power supply device, comprising any one of the above-mentioned DC-DC power supply modules.

[0043] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A DC-DC power supply module, characterized in that: The invention comprises at least one functional circuit, wherein the functional circuit is connected to the installation interface, and the functional circuit comprises a power input interface, an input overcurrent protector, an anti-reverse connection circuit, an input indication circuit, an anti-surge circuit, a π-type input filter circuit, a power module, a π-type output filter circuit, an output overcurrent protector, an output indication circuit and a power output interface; the power input interface is connected to the input overcurrent protector, the input overcurrent protector is connected to the anti-reverse connection circuit, the anti-reverse connection circuit is connected to the input indication circuit, the input indication circuit is connected to the anti-surge circuit, the anti-surge circuit is connected to the π-type input filter circuit, the π-type input filter circuit is connected to the power module, the power module is connected to the π-type output filter circuit and the installation interface, the π-type output filter circuit is connected to the output overcurrent protector, the output overcurrent protector is connected to the output indication circuit, and the output indication circuit is connected to the power output interface; the power module comprises a voltage converter, a second bypass capacitor CE2, a third bypass capacitor CE3, a fourth bypass capacitor CE4, a second resistor R2, a fourth resistor R4, a seventh resistor R7, an eighth resistor R8 and the ninth resistor R9; the positive electrode of the second bypass capacitor CE2 is connected to the π-type input filter circuit and the first end of the second resistor R2, and the negative electrode of the second bypass capacitor CE2 is connected to the GND end of the voltage converter and the first end of the ninth resistor R9; the first end of the second resistor R2 is connected to the Vin end of the voltage converter, and the second end of the second resistor R2 is connected to the CTRL end of the voltage converter; the +Vo end of the voltage converter is connected to the positive electrode of the third bypass capacitor CE3, the Trim end of the voltage converter is connected to the first end of the fourth resistor R4, and the -Vo end of the voltage converter is connected to the first end of the seventh resistor R7 and the eighth resistor R8; the positive electrode of the third bypass capacitor CE3 is connected to the π-type output filter circuit, and the negative electrode of the third bypass capacitor CE3 is connected to the positive electrode of the fourth bypass capacitor CE4, the π-type output filter circuit, the second end of the fourth resistor R4 and the second end of the seventh resistor R7; the negative electrode of the fourth bypass capacitor CE4 is connected to the π-type output filter circuit, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the ninth resistor R9 and the installation interface.

2. The DC-DC power supply module according to claim 1, characterized in that: The installation interface includes a tenth resistor R10, a nineteenth resistor R19, a twenty-first resistor R21, a first installation hole SP1, a second installation hole SP2, a third installation hole SP3 and a fourth installation hole SP4; the first end of the tenth resistor R10 is connected to the second ends of the seventh resistor R7, the eighth resistor R8, and the ninth resistor R9, the first end of the nineteenth resistor R19 and the negative electrode of the fourth bypass capacitor CE4, and the second end of the tenth resistor R10 is connected to the first end of the twenty-first resistor R21; the second end of the nineteenth resistor R19 is connected to the second end of the twenty-first resistor R21, the first installation hole SP1, the second installation hole SP2, the third installation hole SP3 and the fourth installation hole SP4.

3. The DC-DC power supply module according to claim 1, characterized in that: The input overcurrent protector is a second overcurrent protector F2, and the anti-reverse connection circuit is a first diode D1; the first end of the second overcurrent protector F2 is connected to the power input interface, and the second end of the second overcurrent protector F2 is connected to the positive electrode of the first diode D1; the cathode of the first diode D1 is connected to the input indication circuit and the surge protection circuit.

4. The DC-DC power supply module according to claim 1, characterized in that: The input indication circuit includes a fifth resistor R5 and a second indicator LED2, wherein the first end of the fifth resistor R5 is connected to the anti-reverse connection circuit, and the second end of the fifth resistor R5 is connected to the positive electrode of the second indicator LED2; the negative electrode of the second indicator LED2 is connected to the power input interface.

5. The DC-DC power supply module according to claim 1, characterized in that: The surge protection circuit includes a surge protector R3 and a first bypass capacitor CE1, wherein the first end of the surge protector R3 is connected to the input indication circuit, the anti-reverse connection circuit and the positive electrode of the first bypass capacitor CE1, and the second end of the surge protector R3 is connected to the power input interface and the negative electrode of the first bypass capacitor CE1; the positive electrode and the negative electrode of the first bypass capacitor CE1 are connected to the π-type input filter circuit.

6. The DC-DC power supply module according to claim 1, characterized in that: The π-type input filter circuit includes a first capacitor C1, a third capacitor C3 and a first inductor L1; the first end of the third capacitor C3 is connected to the surge protection circuit and the first end of the first inductor L1, and the second end of the third capacitor C3 is connected to the surge protection circuit and the second end of the first capacitor C1; the second end of the first inductor L1 is connected to the first end of the first capacitor C1; the first end of the first capacitor C1 is connected to the positive electrode of the second bypass capacitor CE2, and the second end of the first capacitor C1 is connected to the negative electrode of the second bypass capacitor CE2.

7. The DC-DC power supply module according to claim 1, characterized in that: The π-type output filter circuit includes a second capacitor C2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a second inductor L2, and a third inductor L3; a first end of the fourth capacitor C4 is connected to a first end of the second inductor L2 and a positive electrode of a third bypass capacitor CE3, a second end of the fourth capacitor C4 is connected to a negative electrode of the third bypass capacitor CE3, a positive electrode of the fourth bypass capacitor CE4, a first end of the fifth capacitor C5, a second end of the second capacitor C2, and a first end of the sixth capacitor C6; a second end of the fifth capacitor is connected to a negative electrode of the fourth bypass capacitor CE4 and a first end of the third inductor L3; a first end of the second capacitor C2 is connected to a second end of the second inductor L2 and an output overcurrent protector, and a second end of the second capacitor C2 is connected to an output indication circuit; a second end of the sixth capacitor C6 is connected to a second end of the third inductor L3 and an output overcurrent protector.

8. The DC-DC power supply module according to claim 7, characterized in that: The output overcurrent protector includes a first overcurrent protector F1 and a third overcurrent protector F3; the first end of the first overcurrent protector F1 is connected to the first end of the second capacitor C2, and the second end of the first overcurrent protector F1 is connected to the output indication circuit; the first end of the third overcurrent protector F3 is connected to the second end of the sixth capacitor C6, and the second end of the third overcurrent protector F3 is connected to the output indication circuit.

9. The DC-DC power supply module according to claim 8, characterized in that: The output indication circuit includes a first resistor R1, a sixth resistor R6, a first indicator LED1 and a third indicator LED3; a first end of the first resistor R1 is connected to a second end of the first overcurrent protector F1 and a power output interface, and a second end of the first resistor R1 is connected to a positive electrode of the first indicator LED1; a negative electrode of the first indicator LED1 is connected to the power output interface, a second end of the second capacitor C2, a first end of the sixth capacitor C6 and a positive electrode of the third indicator LED3; a negative electrode of the third indicator LED3 is connected to a first end of the sixth resistor R6; and a second end of the sixth resistor R6 is connected to the power output interface and a second end of the third overcurrent protector F3.

10. A power supply device, characterized in that: Comprising a DC-DC power supply module as described in any one of claims 1 to 9.

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