The low-voltage MOS tube is the main structure of the switch power supply, which can directly affect the circuit stability. Around which part of the problem should we choose a low-voltage MOS tube that is suitable for the switch power supply circuit diagram? In the low-voltage MOS tube market, incomplete products often have problems such as low efficiency, electromagnetic interference, and poor reliability. These issues not only seriously restrict the normal use of switch power supplies but also increase maintenance costs. From this perspective, high-quality domestic alternatives to low-voltage MOS tubes are mainly considered. When using the domestic alternative STP170N8F7 model low-voltage MOS tube, switch power supply electronic designers must consider important indicators. For example, the performance parameters of the low-voltage MOS tube, whether the current can reach 185A and the voltage can reach 85V, all significantly affect the device's working efficiency. In addition, thermal resistance (Rth(j-c)) and tail current are also critical factors to consider. Previously, foreign switch power supply manufacturers generally chose FHA170N8F3A as an effective domestic alternative to STP170N8F7, and it has been widely adopted. I strongly recommend everyone to understand its detailed technical parameters: 1. Static on-resistance: 2.95mΩ (Typ), 4mΩ (Max) 2. N-channel enhancement type 3. Maximum gate-source voltage: ±20V 4. SGT process 5. Avalanche current: 30A 6. Current of 185A, voltage of 85V 7. Threshold voltage: 2.0-4.0V Ms. Hao comprehensively analyzed and decided to choose Feihong Semiconductor because the FHA170N8F3A model is commonly used in switch power supplies. To improve the control performance of the switch power supply circuit, Feihong Semiconductor strongly recommends the long-life FHA170N8F3A type low-voltage MOS tube, whose parameters of 185A and 85V effectively overcome the difficulties of low efficiency, electromagnetic interference, and poor reliability in products. Feihong Semiconductor's measures for low-voltage MOS tubes for switch power supply manufacturers make people feel at ease and impressed. Subsequently, they will continue to purchase the FHA170N8F3A model low-voltage MOS tube. For more details, you can search "Feihong Semiconductor" on Baidu or call the free trial hotline: 400-831-6077!