Date:2026-03-09 Categories:Application Cases Hits:437 From:Guangdong Youfeng Microelectronics Co., Ltd
What is a car emergency starter power supply? It is a multifunctional portable mobile power supply developed for drivers, outdoor enthusiasts, and business people. As an extension of mobile power supply, its unique feature is to enable car startup when the car cannot be started normally due to battery depletion or other reasons. Meanwhile, it combines the functions of emergency power supply, outdoor lighting, mobile power supply, laptop power supply, etc., making it one of the essential products for outdoor travel.
In the field of automotive electronics, MOSFETs are widely used. Most of them are used as switch transistors, and MOSFETs are indispensable from power supplies to various types of power drives.
There are two options for emergency starting power supplies: batteries and supercapacitors. During use, batteries exhibit shortcomings such as long charging times, low power output, short cycle life, and room for improvement. Batteries themselves are demanding on the operating environment, with optimal operating temperatures ranging from 20 to 30℃. They also have long charging times, low discharge power, and short cycle life, all of which present opportunities for improvement. Therefore, MOSFETs play a significant role in automotive emergency power supplies.
The application of YFW Youfengwei MOSFETs in automotive emergency starter power supplies mainly includes the following models:
1> YFW6946 dual N-channel, SOP-8 package, 60V, 6.5A, internal resistance 43mΩ
Corresponding models: AOS Bandai model AO4828/AOSD62666E, Avago model FDS5351, Vishay model Si4946CDY
Application scenarios: consumer electronics, LED lights, audio equipment, digital products, small appliances, protection boards.
2》YFW4407, single P-channel, SOP-8 package, -30V, 13A, internal resistance 9.6mΩ,
Corresponding models: AOS Bandai model AO4407/4407A, ON Semiconductor model FDS6673BZ, and Vishay model Si4825DDY;
Application scenarios: electronic cigarettes, controllers, digital products, small appliances, consumer electronics.
3> YFW90N03AD, single N-channel, TO-252 package, 30V, 90A, internal resistance 4.5mΩ,
Corresponding models: AOS Bandai models AOD4132, AOD508, Avago models FDD050N03B, Infineon models IPD031N03LG/040N03,
The application scenarios include: consumer electronics, electronic cigarettes, wireless charging, motors, drones, medical devices, car chargers, controllers, digital products, and small household appliances.
4》YFW100N75NF features a single N-channel, DFN5X6-8 package, with a voltage rating of 75V and a current capacity of 100A, and an internal resistance of 5.3mΩ,
Corresponding models: AOS Bandai models AON6276, AON6278, ON Semiconductor model NVMFS6H824N, Infineon BSC042NE7NS3G/BSC036NE7NS3G,
Application scenarios: consumer electronics, electronic cigarettes, wireless charging, drones, medical, car chargers, controllers, digital products, small appliances.
5> YFW80N10AD single N-channel, TO-252 package, 100V, 70A, internal resistance 10mΩ
Corresponding models: AOS Bandai model AOD296A, Infineon IPD12CN10NG, STMicroelectronics STD15NF10T4
Application scenarios: automotive electronics, POE LED lights, audio equipment, digital products, small appliances, consumer electronics, protection boards.

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