Wireless Communication
EU RED Network Security Standard EN 18031
Wireless and communication detection
Mobile communication product certification
Bluetooth BQB Product Certification
FM/AM Product Certification
WiFi Product Certification
Wireless charging product certification
Interphone product certification
Base station certification
SAR testing
Receiver Product Certification
5G NR Product Certification
UWB Product Certification
Internet of Things authentication
Electromagnetic compatibility
Automotive Electronics EMC Testing
EMC rectification
EMC
Automotive Electronics
Electrical performance testing
EMS testing - radiation anti-interference testing system (including radar waves)
EMS Testing - Electrostatic Discharge
EMS Test - Transient Conducted Immunity Test
EMS Testing - Portable Transmitter Immunity
EMS Test - High Current Injection (BCI) Test
EMS test - low-frequency magnetic field anti-interference test
EMI Testing - Transient Conducted Emissions Testing System
EMI testing - low-frequency magnetic field emission
EMI Test - Radiation Emission Test
EMI Test - Conducted Emissions Test
Automotive Electronic Testing
Automotive Parts Inspection
Automotive ELV&VOC
Reliability testing
Temperature shock test
Vibration testing
Instrument panel/instrument panel three comprehensive vibration test
Comprehensive vibration test of door inner panel III
Sunvisor Three Comprehensive Vibration Test
Spoiler Three Comprehensive Vibration Test
Three comprehensive vibration tests of car front and rear bumpers
Three comprehensive vibration tests for lamp housing/lampshade
Comprehensive vibration test of outer circumference three
Automotive metal material testing
Performance testing of automotive lighting fixtures
Rapid temperature change test
Vibration
Common issues with vibration testing
Common issues with fatigue testing
Common issues with high and low temperature testing
Conducted Interference (CE) - Suzhou Lixun Standard
Electromagnetic Radiation Tolerance Test (RS) - Suzhou LCS Standard
Electrical Fast Pulse Withstand Test (EFT) - Suzhou LCS Standard
Voltage flicker test - Suzhou LCS standard
Electronic appliances
Household appliance product testing
Electrical accessory product testing
Household appliance testing
Chemical Testing
Introduction to PFAS Testing
MOSH/MOAH Mineral Oil Testing Service
MOSH/MOAH Mineral Oil Testing and Certification Report Service
Consumer Product Testing Services - WEEE Chapter
Ecological textile testing
Leather Footwear Inspection
Food contact material testing
Testing of toys and baby products
Hazardous substance testing
Electronic Cigarette Testing
Electronic cigarette detection
Reliability testing
Other tests - pencil hardness test
Mechanical testing - Packaging compression test
Climate environment testing - Xenon lamp aging test
Battery Testing
Power storage battery testing and certification
Consumer Electronics Battery Testing and Certification
power battery
Light electric vehicle batteries
Energy storage battery
Portable battery
Battery testing
battery test
Lamp Inspection
Inspection of ship lighting fixtures
COI Index Test for Medical Indoor Lighting
Lamp safety inspection
Luminaire energy efficiency testing
EMC testing of lighting fixtures
Integral Ball Laboratory
Photobiology Experiment
Light distribution test
Lamp aging test
Lamp IP waterproof
Lamp performance testing
Lamp reliability testing
Children's toy testing
Testing standards for toy products
China Certification
China's "national promotion" RoHS certification
China Energy Efficiency Label Certification
China Energy Conservation Certification
China CQC Certification
Tmall JD Quality Inspection Report
China SRRC Certification
Taiwan BSMI certification
Taiwan NCC certification
China CCC Compulsory Certification
Asia Certification
Vietnam certification
KC certification
KUCAS Certification in Kuwait
Singapore PSB certification
Iraq COC Certification
IMDA certification
VCCI Certification in Japan
JATE certification in Japan
PSE certification
BIS certification
Japanese TELEC certification
European Certification
RoHS certification
GOST certification in Russia
Russian EAC certification
Northern Ireland UKNI logo
Electrical ENEC certification
European D-MARK certification
Türkiye BTK certification
TSE certification in Türkiye
CE certification in Türkiye
RED certification
German TUV-SUD certification
CE-ERP certification
REACH certification
German GS certification
EU E-Mark certification
North American Certification
Ecuador VOC certification
Mexico NOM certification
IRAM certification
CPSC Certification in the United States
CSA certification
ASTM certification
FDA certification
CEC certification
ETL certification
ul certification
IC certification
Energy Star
FCC Certification in the United States
ASTM certification
Middle East Certification
Israel SII certification
Saudi SABER certification
GCC certification for the seven Gulf countries
Iran COI certification
Qatar COC Certification
Iraq COC Certification
Saudi EER Energy Efficiency Certification
Saudi SABER certification
Algeria PCA certification
PVOC certification
Australia Certification
New Zealand IC-F testing
VEET certification
LCP certification
GEMS certification
RCM certification
C-Tick certification
SAA certification
Africa Certification
Gabon COC certification
Algeria COC certification
Ethiopian VOC and COC certification
Mauritius VOC certification
Ghana COC certification
COC certification in Burundi
Zambia COC certification
Botswana COC Certification
Uganda PVOC certification
SABS certification in South Africa
South African LOA certification
Zimbabwe CBCA Certification
Nigeria SONCAP certification
Kenya PVOC certification
African COC certification
Other certifications
WEEE
Bluetooth BQB certification
IECEE registration
MHRA registration in the UK
TRAINING
Management system training
Laboratory technical training
Laboratory Process Consulting
Laboratory decoration construction
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
The standard for automotive electronic overlay AC voltage has been adjusted. Do not step on these misconceptions
Author.
LCS
Source:
Post time:
2025-12-23
The latest version of ISO 16750-2 "Superposed alternative voltage" test method is ISO 16750-2:2023 (5th edition). Compared to the widely known 2012 version, the 2023 version has undergone significant updates to this test. The most significant change is to adapt to the development of new energy vehicles by significantly expanding the frequency range and introducing closed-loop control testing methods.
01
Test purpose and background changes
2023 version: In addition to traditional generator ripple, high-frequency ripple generated by analog DC/DC converters has been added. This is mainly because high-voltage to low-voltage DC/DC converters are widely used in new energy vehicles, and their switching frequency is much higher than that of traditional generators
2012 version: Simulating residual AC ripple after rectification of vehicle AC generator
02
Detailed explanation of core testing parameters
Expansion of frequency range
The 2023 version of the standard expands the frequency range to 200 kHz and divides it into two frequency bands for testing:
Low frequency range (10 Hz~30 kHz) simulation object: AC generator
Applicable severity levels: Level 1, 2, 3.
High frequency range (30 kHz~200 kHz) simulation object: DC/DC converter
Applicable severity level: Level 4 (this is a newly added level specifically designed for DC/DC ripple)
The 2012 standard frequency range is 50 Hz -25 kHz
Voltage severity level
The 2023 version of the standard defines different peak to peak voltages (Upp), depending on the system voltage (12V or 24V) and severity level:
The maximum peak to peak voltage (Upp) of the 12V system can reach 6V
The maximum peak to peak voltage (Upp) of the 24V system can reach 10V
The 2012 version is 1V, 2V, 4V
Test method: Closed loop control
2023 edition: Closed loop method
Requirement: The AC ripple voltage (Upp) on the DUT terminals must be monitored in real-time.
Control: The testing system needs to automatically adjust the output amplitude to ensure that the ripple voltage on the DUT terminals reaches the target value (Upp) set by the standard, rather than just setting the source output.
Meaning: It increases the rigor of testing, especially for devices with large input capacitors, where the power supply needs to output a larger current to maintain a ripple of 6V or 10V at the DUT end.
2012 Edition: Tour de France
Require the internal resistance of the signal source (50m Ω~100m Ω), set the voltage of the generator, and conduct the test. However, in actual testing, when the input impedance of the device under test (DUT) is low (in order to pass EMC testing and maintain power stability, automotive electronic products usually connect large capacity filtering capacitors in parallel at the power input port. The capacitors are open to DC power, but for AC power, the impedance of the capacitors decreases with increasing frequency), the ripple voltage actually applied to the DUT terminals will significantly decrease due to voltage division.
Sweep frequency parameters
2023 version: Logarithmic Step Mode: Reside at each point within the frequency band for ≥ 2 seconds in logarithmic steps of 2%, only tested once (no longer repeated five times in a continuous triangle loop)
2012 version: Logarithmic triangular sweep on the number axis, from 50 Hz to 25 kHz and back to 50 Hz, 120 seconds per cycle, repeated 5 times
03
Testing Implementation Suggestions and Precautions
Power amplifier upgrade: Due to the use of closed-loop control and frequencies up to 200 kHz, traditional low-frequency power supplies may not be able to meet the requirements. High bandwidth (at least 200kHz or above) bipolar power supply or dedicated ripple generator is required.
Current capability: In closed-loop mode, in order to maintain high-frequency ripple of 6V or 10V on low impedance loads, the power supply needs to have extremely strong transient current output capability.
Connection method: The inductance effect of the test harness significantly affects voltage accuracy at high frequencies (200 kHz), so voltage sampling feedback must be performed very close to the DUT connector.
The superimposed AC voltage test of ISO 16750-2:2023 is more rigorous and realistic. It no longer assumes the internal resistance of the power supply, but requires the DUT to withstand a specified ripple voltage and cover the high-frequency interference frequency band unique to new energy vehicles. Lixun Testing adopts the 3C-TEST testing system, which can currently complete the new version of superimposed AC voltage testing. Contact us immediately to obtain testing port and scheduling information.
Related articles
New articles
Media Center
Latest News
Contact Us
National 24-hour service hotline
400-116-2629
Group Headquarters
E-mail: webmaster@lcs-cert.com
Address: Shenzhen City, Baoan District, Shajing Street, Nga side of the school of Wei Juji Industrial Park, Building A 1 ~ 2 floor, Building C 3 floor
WeChat Inquiry
Reservation
Contact Us
National 24-hour service hotline
Address：Juji Industrial Park, Xueziwei, Ngabian, Shajing Street, Baoan District, Shenzhen Building A 1~2F, Building C 3F
WeChat public number
Share industry dry goods
WeChat consultation
Please note consulting services
Follow Jitterbug
Mobile website
di complaint mailbox: customer.complaint@lcs-cert.com complaint telephone tel: 18126445450 certificate report verification of authenticity mailbox: verification@lcs-cert.com