A novel method for characterizing the characteristics of radiation-hardened DC / DC converters

Abstract

A novel method for characterizing the characteristics of radiation-resistant DC / DC converters is proposed. The method is aimed at novel radiation-resistant DC / DC converters and analyzes new designs, new processes, new materials, new structures, new application environments or new working deviation conditions for device development and application. A characterization process and method covering absolute maximum ratings, static parameters, dynamic parameters, application characteristic parameters, characteristic curves, radiation-resistant characteristics, reliability indicators, dimensions and other characteristics are established. This aspect can be effectively applied to the development, identification and inspection, application verification and engineering application stages of newly developed radiation-resistant DC / DC converters.

Description

Technical Field

[0001] The present invention relates to a novel method for characterizing characteristics of a radiation-resistant DC / DC converter. Based on the internal functional performance design and production assembly process of the radiation-resistant DC / DC converter, and according to the requirements of the functional performance, environmental applicability, application reliability, etc. of the DC / DC converter when used in different spacecraft, a method for characterizing characteristics of the DC / DC converter is designed. The method can be used for characterizing the inherent characteristics of a certain radiation-resistant DC / DC converter and for subsequent evaluation after the research and development or technical improvement is completed, and belongs to the field of electronic product reliability engineering technology. Background Art

[0002] Radiation-resistant DC / DC converters are usually developed using thick film technology, which means that capacitors, resistors, inductors, semiconductor devices and interconnecting wires are made into circuit units with certain functions on a substrate through printing and other processes. DC / DC power converters have the advantages of high efficiency and small size. Their main function is to convert the primary bus voltage into a secondary output voltage isolated from the primary bus according to the needs of different power loads. Radiation-resistant DC / DC converters are an important part of the spacecraft power supply system. They mainly provide stable voltage and power for various electronic circuits of the spacecraft. They are key components of a single machine or even a system. The failure of radiation-resistant DC / DC converters can cause system functional failures and even affect the stable operation of weapons and equipment. Compared with ordinary DC / DC converters, DC / DC converters for spacecraft have the characteristics of complex application load characteristics, high reliability requirements, applicability to special space environments, and non-repairability. Existing characterization methods usually only characterize the maximum ratings, static parameters and dimensions of DC / DC converters, but lack dynamic parameters, application characteristic parameters, reliability indicators, etc., and cannot fully characterize the inherent characteristics of a radiation-resistant DC / DC converter, resulting in the inability to fully evaluate and assess it before it is applied in electronic systems, which brings quality risks to subsequent applications. Therefore, it is necessary to conduct analysis of new designs, new processes, new materials, new structures, new application environments or new working deviation conditions for new radiation-resistant DC / DC converters, device development and application, and establish characterization processes and methods covering absolute maximum ratings, static parameters, dynamic parameters, application characteristic parameters, characteristic curves, radiation-resistant characteristics, reliability indicators, dimensions and other characteristics. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art, aiming at the inherent characteristics of a new type of radiation-resistant DC / DC converter, combined with the special requirements of spacecraft, and propose a characterization process and method covering key characteristics such as electrical characteristic parameters, radiation resistance characteristics, and reliability indicators.

[0004] The technical solution of the present invention is: a novel radiation-resistant DC / DC converter characteristic characterization method, which determines whether a DC / DC converter product to be characterized meets one or more conditions of new characteristic characterization conditions; if satisfied, determines whether to redefine the performance indicators of the DC / DC converter product, and redefines the performance indicators of the DC / DC converter product when it is necessary to redefine the performance indicators of the DC / DC converter product; otherwise, corrects and determines its characteristic characterization form according to the DC / DC converter product to be characterized.

[0005] Furthermore, the new property characterization conditions include:

[0006] With new product design;

[0007] With new structure or shell packaging;

[0008] With new processing technology or materials;

[0009] Select new internal components;

[0010] Having a new working environment or working deviating conditions.

[0011] Furthermore, the performance indicators of the DC / DC converter product include electrical characteristic parameters, anti-radiation characteristic parameters and conditions, reliability indicators, and external dimensions and weight.

[0012] Further, re-determining the electrical characteristic parameters includes the following steps:

[0013] Step A1.1: Determine the absolute maximum ratings, including: input voltage, output power, output current, lead soldering temperature, and storage temperature range;

[0014] Step A1.2: Determine the recommended operating conditions, including: input voltage range, operating temperature range, and output current range;

[0015] Step A1.3: Determine the values ​​of static parameters, including: output voltage, output current, voltage regulation, load regulation, input current, input reflected ripple current, input reflected ripple voltage, switching frequency, efficiency, insulation resistance, output response to load step, output response to input voltage jump, startup overshoot, external synchronization frequency range, prohibition end open circuit voltage, input impedance, output impedance;

[0016] Step A1.4: Determine the values ​​of dynamic parameters, including: output response to load step, recovery time to load step, output response to input voltage jump, recovery time to input voltage jump, startup delay, and load fault recovery time;

[0017] Step A1.5: Determine the application characteristic parameter values, including: output ripple voltage, short-circuit power consumption, capacitive load, and protection power;

[0018] Step A1.6: Determine the characteristic curves, including: efficiency-output power curve, efficiency-input voltage curve, output voltage-case temperature curve, output voltage-input voltage curve, output voltage-output power curve, efficiency-case temperature curve, efficiency-external synchronous frequency curve, limit load with case temperature curve, start-up overshoot / delay curve, start-up delay / capacitive load curve, load step curve, input step curve.

[0019] Further, re-determining the radiation resistance characteristic parameters and conditions includes the following steps:

[0020] Step A2.1: Determine the total anti-ionization dose indicators and conditions, including total anti-ionization dose evaluation, bias conditions, dose rate requirements and test methods;

[0021] Step A2.2: Determine the single-event performance indicators and conditions, including: single-event latch-up (SEL), single-event functional failure (SEFF), and device single-event transient (SET) requirements, bias conditions, and test methods.

[0022] Further, re-determining the reliability index includes the following steps:

[0023] Step A3.1: Determine the anti-static capability based on the circuit's sensitivity to damage and degradation due to electrostatic discharge (ESD).

[0024] Step A3.2: Determine the surge protection capability based on the current characteristics of this circuit at the moment of connection;

[0025] Step A3.3: Determine the electromagnetic compatibility characteristics. Under the condition of using an EMI filter, determine the electromagnetic compatibility characteristics based on the test results based on the capabilities of this circuit in the CE102 test and CS101 test.

[0026] Further, re-determining the overall dimensions and weight includes the following steps:

[0027] Step A4.1: Determine the overall dimensions: Measure the length, width, height, lead-out length, lead-out width, and lead-out segment spacing of the eight qualified products and determine the average value;

[0028] Step A4.2: Determine weight: Measure the weight of 8 qualified products and determine the average value and tolerance.

[0029] Furthermore, the step of correcting and determining the characteristic characterization form of the DC / DC converter product to be characterized comprises the following steps:

[0030] Step B1: Select a DC / DC converter characteristic characterization form with similar design, process and structure.

[0031] Step B2: Verify and revise the characterization form in combination with product functional performance.

[0032] A computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the steps of a novel radiation-resistant DC-DC converter characteristic characterization method.

[0033] A novel radiation-resistant DC-DC converter characteristic characterization device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the novel radiation-resistant DC-DC converter characteristic characterization method are implemented.

[0034] The advantages of the present invention compared with the prior art are:

[0035] 1. The existing radiation-resistant DC / DC converter characteristic characterization methods generally only characterize the maximum rating, static parameters and dimensions of the DC / DC converter, without considering the characteristics of DC / DC converters for spacecraft, such as complex application load characteristics, high reliability requirements, applicability to special space environments, and non-repairability. There are deficiencies in dynamic parameters, application characteristic parameters, reliability indicators, etc., and it is impossible to fully characterize the inherent characteristics of a radiation-resistant DC / DC converter. It is impossible to fully characterize the inherent characteristics of a radiation-resistant DC / DC converter, resulting in the inability to fully evaluate and evaluate before the application of the electronic system, which brings quality risks to subsequent applications. The present invention focuses on the special requirements of spacecraft and proposes a comprehensive characteristic characterization method. For the development and application of devices, new designs, new processes, new materials, new structures, new application environments or new working deviation conditions are analyzed, and a characterization process and method covering absolute maximum ratings, static parameters, dynamic parameters, application characteristic parameters, characteristic curves, radiation-resistant characteristics, reliability indicators, dimensions and other characteristics are established. This aspect can be effectively applied to the development, identification and inspection, application verification and engineering application of newly developed radiation-resistant DC / DC converters.

[0036] 2. The prior art usually characterizes the functional performance of components, but lacks characterization of characteristics closely related to the application, such as ripple suppression, load characteristics, parallel current sharing characteristics, etc. It is necessary to combine the common requirements of spacecraft and carry out evaluation and assessment of application characteristics during the development stage of new DC / DC converters. The present invention can effectively guide the establishment of characteristic characterization projects and conditions for DC / DC converters for spacecraft, improve the identification, inspection and assessment of DC / DC converters before installation and application, and avoid application quality problems in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A novel radiation-resistant DC / DC converter characteristic characterization flow chart of the present invention;

[0038] Figure 2 SWH / (20-50)-12-60 / SP efficiency-output power curve of the embodiment of the present invention;

[0039] Figure 3 SWH / (20-50)-12-60 / SP efficiency-input voltage curve of an embodiment of the present invention;

[0040] Figure 4 This is the output voltage-shell temperature curve of SWH / (20-50)-12-60 / SP in the embodiment of the present invention;

[0041] Figure 5 This is the output voltage-input voltage curve of SWH / (20-50)-12-60 / SP in the embodiment of the present invention;

[0042] Figure 6 This is the output voltage-output power curve of SWH / (20-50)-12-60 / SP in the embodiment of the present invention;

[0043] Figure 7 SWH / (20-50)-12-60 / SP efficiency-shell temperature curve of the embodiment of the present invention;

[0044] Figure 8 This is the SWH / (20-50)-12-60 / SP efficiency-external synchronization frequency curve of the embodiment of the present invention;

[0045] Fig. 9 This is the SWH / (20-50)-12-60 / SP limit load-shell temperature curve of the embodiment of the present invention;

[0046] Fig.10 This is the startup overshoot / delay curve of SWH / (20-50)-12-60 / SP in the embodiment of the present invention; Left figure: V I =28V, startup delay 14.1ms, startup overshoot 0mV; right figure: VI =42V, start-up delay 14.0ms, start-up overshoot 0mV;

[0047] Fig.11 This is the start-up overshoot / capacitive load of SWH / (20-50)-12-60 / SP in the embodiment of the present invention; upper left: V I =28V, C L =1000μF startup delay 12.40ms; upper right: V I =42V, C L =1000μF start-up delay 15.00ms; bottom left: V I =28V, C L =1500μF, start-up delay 12.40ms; bottom right: V I =42V, C L =1500μF, start-up delay 15.00ms;

[0048] Fig.12 SWH / (20-50)-12-60 / SP V in the embodiment of the present invention I =28V load step (50% load ~ full load ~ 50% load);

[0049] Fig.13 SWH / (20-50)-12-60 / SP input step of the embodiment of the present invention; (a) 20V→50V input voltage transient curve; (b) 50V→20V input voltage transient curve. DETAILED DESCRIPTION

[0050] In order to better understand the above technical scheme, the technical scheme of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0051] The following is a further detailed description of a novel radiation-resistant DC / DC converter characteristic characterization method provided by the embodiment of the present application in conjunction with the accompanying drawings of the specification. The specific implementation method may include (such as Figures 1 to 13 The steps are as follows:

[0052] (1) Step M: Analyze a DC / DC converter product and analyze the following situations. If one or more of the following situations are met, proceed to Step A. If none of the following situations are met, proceed to Step B:

[0053] ①Is there any new product design?

[0054] ②Does it have a new structure or shell packaging?

[0055] ③Is it a new processing technology or material?

[0056] ④Are new internal components selected?

[0057] ⑤Is it a new working environment or deviant working conditions?

[0058] (2) Step A: Based on the analysis results of step M, further make the following judgments:

[0059] ① Do you want to redefine the electrical characteristic parameters? If yes, go to step A1; if no, go to step B.

[0060] ② Do you want to redefine the radiation resistance characteristic parameters and conditions? If “yes”, go to step A2; if “no”, go to step B.

[0061] ③ Do you want to redefine the reliability index? If “yes”, go to step A3; if “no”, go to step B.

[0062] ④ Do you want to re-determine the dimensions and weight? If “yes”, go to step A4; if “no”, go to step B.

[0063] (3) Step A1:

[0064] Step A1.1: Determine the absolute maximum ratings, including: input voltage, output power, output current, lead soldering temperature, and storage temperature range;

[0065] Step A1.2: Determine the recommended operating conditions, including: input voltage range, operating temperature range, and output current range;

[0066] Step A1.3: Determine the values ​​of static parameters, including: output voltage, output current, voltage regulation, load regulation, input current, input reflected ripple current, input reflected ripple voltage, switching frequency, efficiency, insulation resistance, output response to load step, output response to input voltage jump, startup overshoot, external synchronization frequency range, prohibition end open circuit voltage, input impedance, output impedance;

[0067] Step A1.4: Determine the values ​​of dynamic parameters, including: output response to load step, recovery time to load step, output response to input voltage jump, recovery time to input voltage jump, startup delay, and load fault recovery time;

[0068] Step A1.5: Determine the application characteristic parameter values, including: output ripple voltage, short-circuit power consumption, capacitive load, and protection power;

[0069] Step A1.6: Determine characteristic curves, including: efficiency-output power curve, efficiency-input voltage curve, output voltage-case temperature curve, output voltage-input voltage curve, output voltage-output power curve, efficiency-case temperature curve, efficiency-external synchronous frequency curve, limit load with case temperature curve, start-up overshoot / delay curve, start-up delay / capacitive load curve, load step curve, input step curve;

[0070] (3) Step A2:

[0071] Step A2.1: Determine the total anti-ionization dose indicators and conditions, including total anti-ionization dose evaluation, bias conditions, dose rate requirements and test methods.

[0072] Step A2.2: Determine the single-event performance indicators and conditions, including: single-event latch-up (SEL), single-event functional failure (SEFF), and device single-event transient (SET) requirements, bias conditions, and test methods.

[0073] (3) Step A3:

[0074] Step A3.1: Determine the anti-static capability based on the circuit's sensitivity to damage and degradation due to electrostatic discharge (ESD).

[0075] Step A3.2: Determine the surge protection capability based on the current characteristics of this circuit at the moment of connection.

[0076] Step A3.3: Determine the electromagnetic compatibility characteristics. Under the condition of using an EMI filter, determine the electromagnetic compatibility characteristics based on the test results based on the capabilities of this circuit in the CE102 test and CS101 test.

[0077] (4) Step A4:

[0078] Step A4.1: Determine the dimensions

[0079] Measure the length, width, height, lead-out length, lead-out width, lead-out section spacing, etc. of the 8 qualified products and determine the average value;

[0080] Step A4.2: Determine the weight

[0081] Measure the weight of 8 qualified products and determine the average value and tolerance;

[0082] (4) Step B:

[0083] Step B1: Select a DC / DC converter characteristic characterization form with similar design, process and structure.

[0084] Step B2: Verify and revise the characterization form in combination with product functional performance.

[0085] like Figures 2 to 13 In the solution provided in the embodiment of the present application, the following steps are specifically included:

[0086] (1) Step M: Analyze a DC / DC converter product and analyze the following situations. If one or more of the following situations are met, proceed to Step A. If none of the following situations are met, proceed to Step B:

[0087] ①Does it have new product design? Yes

[0088] ②Is it a new structure or housing package? No

[0089] ③Is it a new processing technology or material? Yes

[0090] ④Are new internal components used? No

[0091] ⑤ Is it a new working environment or a deviating working condition? No

[0092] (2) Step A: Based on the analysis results of step M, further make the following judgments:

[0093] ① The electrical characteristic parameters of the product need to be re-determined, and then proceed to step A1;

[0094] ② The product needs to re-determine the radiation resistance parameters and conditions and proceed to step A2;

[0095] ③ The reliability index of the product needs to be re-determined and go to step A3.

[0096] ④ The product needs to be re-determined in terms of dimensions and weight, and then proceed to step A4.

[0097] (3) Step A1:

[0098] Step A1.1: Determine the absolute maximum ratings, including: input voltage, output power, output current, lead soldering temperature, and storage temperature range;

[0099] 1 <![CDATA[Input voltage (V I )]]> 0V~51V 2 <![CDATA[Output power (P O )]]> 62W 3 <![CDATA[Output current (I O )]]> 0.5A~5A 4 <![CDATA[Operating temperature range (T C )]]> -55℃～125℃ 5 <![CDATA[Lead wire soldering temperature resistance (T h )]]> 300℃(10s) 6 <![CDATA[Storage temperature range (T stg )]]> -65℃～150℃

[0100] Step A1.2: Determine the recommended operating conditions, including: input voltage range, operating temperature range, and output current range;

[0101] 1 <![CDATA[Input voltage range (V I )]]> 20V~50V 2 <![CDATA[Operating temperature range (T C )]]> -55℃～125℃ 3 Output Current 0.5A~5A

[0102] Step A1.3: Determine the values ​​of static parameters, including: output voltage, output current, voltage regulation, load regulation, input current, input reflected ripple current, input reflected ripple voltage, switching frequency, efficiency, insulation resistance, output response to load step, output response to input voltage jump, startup overshoot, external synchronization frequency range, prohibition end open circuit voltage, input impedance, output impedance;

[0103]

[0104] Step A1.4: Determine the values ​​of dynamic parameters, including: recovery time when load step occurs, recovery time when input voltage jump occurs, startup delay, and load fault recovery time;

[0105]

[0106] Step A1.5: Determine the application characteristic parameter values, including: output ripple voltage, short-circuit power consumption, capacitive load, and protection power;

[0107] Serial number project symbol Typical Value unit 1 Output ripple voltage <![CDATA[V RIP ]]> 66 mV 2 Short circuit power consumption <![CDATA[P D ]]> 14.8 W 3 Capacitive load <![CDATA[C L ]]> 1000 μF 4 Protection power <![CDATA[P W ]]> 78.3 W

[0108] Step A1.6: Determine characteristic curves, including: efficiency-output power curve, efficiency-input voltage curve, output voltage-case temperature curve, output voltage-input voltage curve, output voltage-output power curve, efficiency-case temperature curve, efficiency-external synchronous frequency curve, limit load with case temperature curve, start-up overshoot / delay curve, start-up delay / capacitive load curve, load step curve, input step curve;

[0109] (3) Step A2:

[0110] Step A2.1: Determine the total anti-ionization dose index and conditions, including: the total anti-ionization dose is not less than 100 krad (Si), and the dose rate is 0.1 rad (Si) / s;

[0111] Step A2.2: Determine the single-particle performance indicators and conditions, including: the device single-particle lock-in (SEL) LET threshold is not less than 75 MeV cm 2 / mg, the LET threshold of the device single-event functional failure (SEFF) is not less than 75MeV·cm 2 / mg (output voltage is 0 or output oscillation), single particle transient effect unqualified criterion: the change of transient waveform amplitude relative to steady-state waveform amplitude ≥ ±10% of output voltage, minimum pulse width ≥5ms, if both conditions are met at the same time, it is judged as unqualified.

[0112] (3) Step A3:

[0113] Step A3.1: Determine the antistatic capability of 2000V and ESD level 2 based on the sensitivity of microcircuits to damage and degradation caused by electrostatic discharge (ESD);

[0114] Step A3.2: Determine the surge resistance capability and determine the surge resistance voltage to be 80V / 50ms according to the surge resistance test specification;

[0115] Step A3.3: Determine the electromagnetic compatibility characteristics. The device is tested with CE102 and CS101 under the condition of using an EMI filter, and the electromagnetic compatibility characteristics are determined based on the test results.

[0116] (4) Step A4:

[0117] Step A4.1: Determine the dimensions

[0118] Measure the length, width, height, lead-out length, lead-out width, lead-out section spacing, etc. of the 8 qualified products and determine the average value;

[0119]

[0120] Step A4.2: Determine the weight

[0121] The weight of 8 qualified products was measured and the average value and tolerance were determined to be 75g±7g;

[0122] (4) Step B:

[0123] Step B1: Select a DC / DC converter characteristic characterization form with similar design, process and structure;

[0124] Step B2: Verify and revise the characterization form in combination with product functional performance.

[0125] The actual implementation proves that the characteristic characterization method can meet the requirements of the characteristic characterization of the new radiation-resistant DC / DC converter, and the method can make the characteristic list determined for DC / DC conversion more instructive and the evaluation and assessment results more comprehensive.

[0126] The present application provides a novel radiation-resistant DC / DC converter characteristic characterization method, which can characterize the characteristics of the radiation-resistant DC / DC converter. When the novel radiation-resistant DC / DC converter characteristic characterization method characterizes the characteristics of the radiation-resistant DC / DC converter, the radiation-resistant DC / DC converter performs Figure 1 The method described.

[0127] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0128] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0129] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0130] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0131] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0132] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A novel method for characterizing characteristics of a radiation-resistant DC / DC converter, characterized in that: Determine whether the DC / DC converter product to be characterized meets one or more conditions for characterizing the new characteristics; if satisfied, determine whether to redetermine the performance indicators of the DC / DC converter product, and redetermine the performance indicators of the DC / DC converter product when it is necessary to redetermine the performance indicators of the DC / DC converter product; Otherwise, the characteristic characterization form is modified and determined according to the DC / DC converter product to be characterized; The new characteristic characterization conditions include: With new product design; With new structure or shell packaging; With new processing technology or materials; Select new internal components; Having a new work environment or deviating work conditions; The performance indicators of the DC / DC converter products include electrical characteristic parameters, radiation resistance characteristic parameters and conditions, reliability indicators, and external dimensions and weight; Re-determining the electrical characteristic parameters includes the following steps: Step A1.1: Determine the absolute maximum ratings, including: input voltage, output power, output current, lead soldering temperature, and storage temperature range; Step A1.2: Determine the recommended operating conditions, including: input voltage range, operating temperature range, and output current range; Step A1.3: Determine the values ​​of static parameters, including: output voltage, output current, voltage regulation, load regulation, input current, input reflected ripple current, input reflected ripple voltage, switching frequency, efficiency, insulation resistance, output response to load step, output response to input voltage jump, startup overshoot, external synchronization frequency range, prohibition end open circuit voltage, input impedance, output impedance; Step A1.4: Determine the values ​​of dynamic parameters, including: output response to load step, recovery time to load step, output response to input voltage jump, recovery time to input voltage jump, startup delay, and load fault recovery time; Step A1.5: Determine the application characteristic parameter values, including: output ripple voltage, short-circuit power consumption, capacitive load, and protection power; Step A1.6: Determine characteristic curves, including: efficiency-output power curve, efficiency-input voltage curve, output voltage-case temperature curve, output voltage-input voltage curve, output voltage-output power curve, efficiency-case temperature curve, efficiency-external synchronous frequency curve, limit load with case temperature curve, start-up overshoot / delay curve, start-up delay / capacitive load curve, load step curve, input step curve; Redefining the radiation resistance parameters and conditions includes the following steps: Step A2.1: Determine the total anti-ionization dose indicators and conditions, including total anti-ionization dose evaluation, bias conditions, dose rate requirements and test methods; Step A2.2: Determine the single-event performance indicators and conditions, including: single-event lockup (SEL), single-event functional failure (SEFF), and device single-event transient (SET) requirements, bias conditions, and test methods; Redefining the reliability index includes the following steps: Step A3.1: Determine the anti-static capability based on the sensitivity of the circuit to damage and degradation caused by electrostatic discharge (ESD); Step A3.2: Determine the surge protection capability based on the current characteristics of this circuit at the moment of connection; Step A3.3: Determine the electromagnetic compatibility characteristics. Under the condition of using an EMI filter, determine the electromagnetic compatibility characteristics based on the test results based on the capabilities of this circuit in the CE102 test and the CS101 test; Re-determining the dimensions and weight includes the following steps: Step A4.1: Determine the overall dimensions: Measure the length, width, height, lead-out length, lead-out width, and lead-out segment spacing of the eight qualified products and determine the average value; Step A4.2: Determine weight: Measure the weight of 8 qualified products and determine the average value and tolerance; The step of correcting and determining the characteristic characterization form according to the DC / DC converter product to be characterized comprises the following steps: Step B1: Select a DC / DC converter characteristic characterization form with similar design, process and structure; Step B2: Verify and revise the characterization form in combination with product functional performance.

2. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method as claimed in claim 1 are implemented.

3. A novel radiation-resistant DC-DC converter characteristic characterization device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method as claimed in claim 1 are implemented.

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