For engineers engaged in the development of MPPT controllers, selecting the best field-effect transistor (FET) from numerous options is a major challenge. An inappropriate selection not only affects the efficiency of the controller but may also delay the entire project. Faced with thousands of choices, how can the optimal model be selected? This article will provide you with a detailed explanation.

First, we need to understand the characteristics of the MPPT controller. As the brain of the solar photovoltaic system, the MPPT controller can detect the power generation voltage of the solar panel in real time, track the voltage and current values, and enable the system to charge the battery at maximum power output. It has an in-built maximum power point tracking (MPPT) algorithm, making its charging efficiency 15%-20% higher than traditional PWM controllers. The combination of multiple tracking algorithms can accurately find the optimal operating point within one second, with the highest MPPT tracking efficiency reaching 99.9%.

To achieve the best performance of the MPPT controller, the selection of the FET is crucial. We need to consider factors such as voltage, resistance, and process:

1. Voltage Selection. According to the voltage of the solar panel and the battery, for a 12V system, a 60V FET should be used; for a 24V system, an 85-100V FET is recommended; for a 48V system, a 100-150V FET is appropriate; and for a 72V system, a 150-200V FET is required.

2. Resistance and Efficiency. The MPPT controller emphasizes efficiency, so it is necessary to choose a FET with extremely low resistance. Here, we recommend using MOSFETs with SGT (Super Gate Trench) technology, which have minimal gate charge and conduction resistance, effectively enhancing the efficiency of the controller.

3. Reliability. The MPPT controller typically operates under harsh conditions for long periods, so the selected FET must meet industrial-grade reliability standards. It is recommended to select products that have undergone rigorous testing (such as 100% avalanche and thermal resistance tests), with high consistency.

Taking into account the above three points, today we recommend a domestic high-power MOSFET packaging enterprise based in Guangzhou for over 20 years. It has strong technical strength and innovation capabilities. It emphasizes academic-industry-research cooperation and jointly builds an innovation practice base with South China University of Technology, holding 15 patents. Its products are widely used in controllers, electric vehicles, LED lighting, power supplies, inverters, and other fields.

For MPPT controllers, Feihong Semiconductor has developed a full range of MOSFET products suitable for various models ranging from 12V to 72V. These include the following models and parameters:

FHP150N06B: N15, TO-220, 2~4, 150A, 60V

FHP200N6F3A: A11, TO-220, 2~4, 200A, 60V

FHP120N7F6A: R6, TO-220, 2~4, 120A, 70V

FHP100N8F6A: N8, TO-220, 2~4, 120A, 85V

FHP110N8F5B: N10, TO-220, 2~4, 147A, 85V

FHP170N8F3A: N15, TO-220, 2~4, 185A, 85V

FHP230N8F3A: N20, TO-220, 2~4, 230A, 85V

FHP130N1F5A: N10, TO-220, 2~4, 147A, 100V

FHP170N1F4A: N17, TO-220, 2~4, 172A, 100V

FHP230N1F3A: N23, TO-220, 2~4, 230A, 100V

FHP250N1F2A: N25, TO-220, 2~4, 250A, 100V

FHP120N15F7A: T18, TO-220, 2~4, 120A, 150V

FHP140N15F7A: R30, TO-220, 2~4, 140A, 150V

In summary, the selection of the MPPT controller should take into account factors such as voltage, resistance, process, and reliability. Choosing the right FET allows the MPPT controller to perform at its best, optimizing the efficiency of the photovoltaic system. Feihong Semiconductor's series of specialized solutions are worth choosing and trusting by research and development engineers. Choosing Feihong means choosing a reliable partner to co-create a better future for MPPT controllers!

The rapid iteration of the domestic market highlights the importance of selecting the right model to improve the quality of MPPT controllers. Feihong Semiconductor's MOSFETs are already widely used in the solar energy sector, power circuits, smart home appliances, new energy electronics industries such as automotive electronics, electric bikes, chargers, computer power supplies, etc., providing high-quality products and services to domestic electronic product manufacturers. In addition to offering free samples, they can also customize MOSFET products according to customer needs. Simply enter "Feihong Semiconductor" on Baidu to find us. Free sample hotline: 400-831-6077.