Dual NMOS is a powerful and widely used MOS product, which consists of two NMOS transistors, one of which is used as a switch tube to control the input and output of signals. The other is used as a load tube to provide current driving function. The source and drain of these two transistors are common, forming a common source structure. This kind of MOS usually has the characteristics of low power consumption, high energy efficiency, high reliability and good security, and is a discrete device product selected by many electronic products.

The MOS transistor AO8822 explained in this issue is made of N+N channel, which has good electrical performance and is a high-performance and low-power discrete device product. It can withstand a maximum drain-source voltage of 20V, a gate-source voltage of 12V, a continuous drain current of 7A, a drain-source on-resistance of 0.018 Ohm, a minimum gate threshold voltage of 0.5V, a maximum gate threshold voltage of 1V and a dissipation power of 1500mW. It has very low on-resistance, which is very helpful for low-power products. It has high current handling ability and fast switching speed. It is suitable for switching circuits and high-current circuits, such as power supply, battery management, motor drive and inverter. The products are widely used in many circuits because of their heat dissipation, low power consumption and small size.

As a dual NMOS tube, AO8822 is packaged in TSSOP-8. The product has the advantages of small space and low height, thinner than the traditional SOP package, smaller PCB area, and thinner profile, which is especially suitable for portable devices and space-limited application scenarios. Easy welding, surface mount technology, convenient, efficient and stable welding. This product is widely used in applications that require highly optimized space and electrical performance, including smart small household appliances, power products, switching power supplies, LED dimming and LED driver products, audio amplifiers, relay drivers and other products.

AO8822 products mainly play the role of switching and current and voltage regulation in the circuit. For example, in the motor driving circuit, the characteristics of AO8822 are suitable for various motor driving scenarios, including switching power supply products. Its extremely low on-resistance and high reliability help switching power supply products reduce energy loss and improve overall system efficiency.

In the motor drive controller, AO8822 can carry a stable current and control the speed of the motor through the switch. In the application of LED dimming, because of its excellent conduction performance and low loss characteristics, it can help the circuit improve the dimming effect and system efficiency. In many protection circuits, AO8822 plays an important role as a development. As a load switch in many circuits, AO8822 is suitable for one-way or two-way load switches, and its common drain configuration makes it perform well in load switch applications.

As a medium and low voltage MOS transistor, engineers should pay attention to the circuit protection and overheating protection of MOS when designing the circuit, so as not to exceed its maximum drain-source voltage, so as to ensure that MOS can be safely turned off under abnormal conditions and prevent damage.