I. Key Requirements of Automotive Electronic Power Supplies
Today, the world is gradually ceasing the production and sale of traditional energy vehicles, and major automakers are all planning for new energy vehicles. With the continuous development of new energy vehicles, the number and complexity of electronic systems in automobiles are also rapidly increasing . To improve driving safety, comfort, efficiency, and performance, higher demands are being placed on the performance of automotive power supplies.
IATF16949 system
To enter the automotive sector and penetrate the supply chains of major Tier 1 automotive electronics manufacturers, it is necessary to meet the ISO/IATF 16949 Quality Management System standard , which requires a zero-defect supply chain quality management system .
AEC-Q100/200 standard
The reliability verification of automotive electronic components is based on the AEC-Q100 ( integrated circuit IC) , AEC-Q101 ( discrete components ) , AEC -Q102 ( discrete optoelectronic LED) , AEC-Q104 ( multi-chip components ) , and AEC-Q200 ( passive components ) reliability standards promoted by the North American automotive industry.
The above two requirements are essential for entering the vehicle industry and penetrating the supply chains of major Tier 1 automotive electronics manufacturers.
Automotive EMC Standards
It must comply with automotive-grade electromagnetic compatibility standards: ISO11452/CISPR 25/ISO 7637/ISO 10605 .
Ultra-wide low-voltage start
The environmental conditions and testing standards for electrical and electronic equipment of road vehicles, GB/T 28046.2-2011 , have specific requirements for the instantaneous drop in input voltage. For example, in a 12V system, the instantaneous voltage drop is required to be 4.5V , and in a 24V system, it is required to be 9V . The Mornsun wide-voltage automotive-grade power supply CUWB12xxYMD-6WR3 meets the ultra-wide input voltage range of 4.5 to 36VDC , thus satisfying the instantaneous voltage drop requirements in the standard.
Wide operating temperature range
Experiments have shown that when a car is exposed to direct sunlight for a long time in an outdoor environment with a temperature of 40°C, the interior temperature will be above 70°C , and can reach as high as 90°C . In cold winters, the interior temperature is very low, which may cause problems with the power supply starting and affect the normal use of the car.
Automobiles are used in a wide range of environments, requiring an ultra-wide operating temperature range to meet the needs of applications in different temperature conditions.
II. Common Power Supply Solutions for Automotive Electronic Systems
Typical solution: PTC system for automotive heating
The difference between traditional car heating PTC systems and electric vehicle heating systems is that electric vehicles do not have engine waste heat that can be utilized or cannot fully utilize engine waste heat, and therefore require a heat pump type air conditioning system or auxiliary heater; for electric heating PTC systems, the current solutions mainly include electric heat pump air conditioning systems and electric compressor refrigeration and electric heater hybrid regulation air conditioning systems.
A typical solution adopted by car manufacturers is as follows: the air conditioning is an electric air conditioner, and the heating is a PTC heater, providing rapid cooling and heating; the air conditioning ECU is a fully automatic air conditioning system, mainly composed of three parts: sensors, the air conditioning ECU , and actuators, employing fuzzy control. The main details of the process are as follows: the air conditioning ECU 's sensors detect outdoor temperature, humidity, compressor operating conditions, temperature setpoint signals, and function selection signals. Through comparison and calculation, it issues commands to automatically start and stop the inverter compressor, condenser fan, electric cooling pump, and PTC heater, ultimately adjusting the temperature and flow rate of the delivered air to achieve intelligent control.
The Mornsun CVRC1215JD-6WR3 provides power to the H- bridge IGBT group , requiring three outputs with isolation withstand voltage of 1000VDC , meeting IATF16949 system control, temperature range of -40 to 105℃ , SMD package, EMI compliance with automotive standard EN55025/CISPR25 Level 4 , isolation voltage of 3000VDC , and the entire product complies with AEC-Q100 automotive standard.
III. Key Features of Mornsun Automotive Power Supplies
IV. Summary
With the continuous increase in the number of cars in China, the development space for automotive electronics is still very large. The global automotive electronics market is projected to reach 2 trillion yuan in 2021, with a growth rate of 6% . Among them, the Chinese market will reach 900 billion yuan, with a growth rate higher than the global average, reaching 10% . Mornsun will keep pace with the times and continuously dedicate itself to providing better power solutions for the automotive electronics industry.
