The Application of MOS Tubes in Automotive Emergency Starting Power Supplies (Episode 1): SOP-8 Encapsulated MOS Tubes - WSP6946 with a Withstand Voltage of 9.6 milliohms at 60V6.5A

The characteristic function of emergency starting power supply: It is used to start the car when it is unable to start normally due to power loss or other reasons. At the same time, it combines functions such as emergency power supply, outdoor lighting, mobile power supply, laptop power supply, and is one of the essential products for outdoor travel.

There are still shortcomings in the traditional technology of emergency starting power supply for automobiles:

1》 When the output of the emergency starting power supply is overloaded, short circuited, or connected back to the car‘s own power supply, there will be a large current output from the emergency power supply, causing the battery to overheat or other damage. When recharged, there may be swelling or even fire problems;

2》 After the car starts, the generator charges the battery in reverse for a long time, making the emergency starting power supply unsuitable or damaged;

3》 Repeated starting of the car by the user in a short period of time can cause the power supply temperature to be too high, causing the car to catch fire;

4》 Users cannot timely obtain information about the power supply, thus unable to understand the battery level that has been idle for a long time and has not been used.

WINSOK (Micro Master Semiconductor) MOS transistor model WSP6946 is a dual N-channel, SOP-8 package MOS transistor with a voltage resistance of 43 milliohms at 60V6.5A. It corresponds to the AOS Wandai model AO4828/AOSD62666E, Ansemy model FDS5351, and Weishi model Si4946CDY on the market. This MOS transistor can also be used in consumer electronics, LED lights, audio, digital products, small appliances, protective boards, and other fields.

As is well known, during the use of emergency starting power supplies, there is room for improvement due to long charging time, low power, and short cycle life. Therefore, to improve performance, it is necessary to start with power components, and the application of MOS transistors is particularly important.