Datasheet download

Product features:

◆ Universal voltage: 85~305VAC/100~430VDC

◆ Stabilized output, low ripple, noise

◆ Output short circuit, overcurrent, overvoltage protection

◆ Full plastic shell, compliant with UL94V-0

◆ Passed UL60950 and EN60950 certification

◆ PCB rail type and other installation methods

◆ Three-year warranty period

　　A Complete Guide to AC-DC automotive grade power modules: Providing Reliable Power to Automotive Electronics

　　The unique value and core requirements of automotive grade power modules

AC-DC automotive grade power module is a power conversion device specially designed for automotive electronic systems. It is responsible for converting vehicle AC power or generator power into the stable DC voltage required by each electronic control unit. Compared with ordinary industrial power supplies, automotive grade power supplies must meet the unique stringent requirements of the automotive industry:Adaptability to extreme environments(-40℃ to +125℃ operating temperature),Excellent reliability(up to 15 years service life),Strict quality standards(zero defect quality goal) andspecific safety regulations(Compliant with ISO 26262 functional safety). This type of power module is widely used in key areas such as in-vehicle infotainment systems, advanced driver assistance systems (ADAS), battery management systems (BMS) and body control modules.

　　Analysis of key technical parameters of Automotive grade power supply

When choosing a suitable automotive-grade power module, you need to focus on the following technical parameters:

　　Technical parametersVehicle grade requirementsSelection guide

　　Working voltage rangeMeeting the voltage fluctuations of start/stop systems usually requires a wide input range of 6V-36V, supporting cold start

　　Temperature levelComply with AEC-Q100 standard Grade 1: -40℃ to +125℃; Grade 0: -40℃ to +150℃

　　reliability indexExtremely high MTBF values ​​usually require >1 million hours and failure rate <1ppm

　　efficiency requirementsOptimized thermal energy management, light load efficiency >85%, full load efficiency >92%

　　Isolation withstand voltageEnhanced electrical isolation withstand voltage ≥2500VAC between input and output, meeting safety isolation requirements

　　EMC performancePasses CISPR 25 Class 5 standard with excellent anti-interference capability and low radiation characteristics

　　Quality certificationIATF 16949 system certification ensures that the entire product process meets automotive quality requirements

　　Packaging processMeets automotive vibration requirements using enhanced packaging and passes mechanical vibration testing

　　Professional answers to frequently asked questions about car-grade power supplies

　　Q1: Why must automotive-grade power supplies meet the AEC-Q100 standard?

AEC-Q100 is a stress testing certification standard formulated by the Automotive Electronics Council, which includes many stringent tests such as temperature cycle, high temperature working life, moisture resistance, and mechanical impact. This certification ensures that the power module can withstand various environmental stresses during the entire life cycle of the vehicle, which is the basic guarantee for achieving high reliability. Power modules that do not pass AEC-Q100 certification are at risk of early failure in automotive applications.

　　Q2: How to deal with transient voltage threats in automotive power systems?

There are many transient threats in the automotive power supply environment, including load dump, load dump, cold start, etc.:

　　Choose built-in protection circuitPower module to ensure it can withstand transient voltages above 40V

　　Add external TVS tube, providing additional overvoltage protection

　　Confirm module complies with ISO 7637-2Standard, with specified immunity to transient interference

　　Conduct actual environment testing, verify the stability in real automotive power supply environment

　　Q3: What are the special requirements for thermal management of automotive-grade power supplies?

The temperature in the automotive electronics cabin may reach over 85°C, so thermal management is crucial:

　　Prioritize high-efficiency products, reduce heat generation from the source

　　Consider heat dissipation path design, ensuring that heat can be effectively conducted to the radiator

　　Application in extreme environments, it is RECOMmended to conduct thermal simulation analysis

　　Avoid derating, ensuring that rated power can still be provided in high temperature environments

　　Q4: Why do automotive applications emphasize the EMC performance of power modules?

The electromagnetic environment inside the car is complex and has extremely high safety requirements:

　　Prevent interference with sensitive equipment: ADAS systems such as radars and cameras

　　avoid being disturbed: Ensure that the power supply works stably under strong interference

　　Meet regulatory requirements: Must pass EMC standard testing such as CISPR 25

　　System integration considerations: EMC design needs to be considered from the vehicle level

　　Systematic Troubleshooting Guide

　　Phase One: Basic Diagnosis

　　Power input check: Measure the input voltage under different working conditions such as start/stop

　　Connector status: Check the terminal contact resistance and confirm that the connection is reliable

　　environmental assessment: Record the ambient temperature and working status when the fault occurs

　　Appearance inspection: Observe whether the module has any abnormalities such as bulges, cracks, ablation, etc.

　　Phase 2: Electrical Performance Testing

　　Static parameter measurement: Test basic electrical parameters under standard conditions

　　Dynamic response testing: Simulate load mutation and observe transient response characteristics

　　Ripple noise detection: Use an oscilloscope to measure the output quality

　　Protection function verification: Test overvoltage, overcurrent, and overheating protection functions

　　The third stage: in-depth analysis

　　Thermal imaging analysis: Comprehensively scan module temperature distribution and find abnormal hot spots

　　failure analysis: In case of failure, conduct professional failure analysis

　　comparison test: Compare performance with known good products

　　Environmental testing: Reproduce the fault phenomenon in the thermostat

　　Stage 4: System-level investigation

　　Vehicle power quality: Analyze the stability of the power network

　　Grounding system inspection: Confirm that the grounding impedance meets the requirements

　　Load characteristic analysis: Troubleshoot power problems caused by abnormal load

　　System compatibility: Check compatibility with other ECUs

　　Best Practices for Engineering Applications

　　Key points in the design phase：

　　Early supplier involvement: Let power suppliers participate in system design in advance

　　Derating design principles: There is sufficient margin for voltage, current and temperature.

　　Protection circuit design: Configure a complete protection circuit according to the application scenario

　　Test plan development: Develop a testing plan covering the entire life cycle

　　manufacturing process control：

　　Production process audit: Ensure supplier manufacturing process is under control

　　Incoming material inspection: Establish strict incoming inspection standards

　　Traceability management: Ensure the full life cycle traceability of each module

　　change control: Strictly control any design changes and process changes

　　Reliability guaranteed：

　　accelerated life testing: Predicting product life through accelerated testing

　　Batch consistency monitoring: Ensure consistent quality of products from different batches

　　Field data collection: Establish on-site failure data collection and analysis mechanism

　　Continuous improvement：Continuous improvement of quality based on data-driven

　　Conclusion

Automotive-grade AC-DC power modules are the core power of automotive electronic systems, and their reliability is directly related to vehicle safety and user experience. Choosing professional suppliers with industry certification and rich experience and establishing a complete selection, testing and quality management system are the keys to ensuring the reliable operation of the automotive power system. As automobile electronics and intelligence continue to increase, the requirements for power modules will become increasingly stringent, requiring collaborative innovation by all parties in the industry chain to jointly promote technological progress.