The application of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) in LEDs is widespread, primarily used for adjusting the brightness and current of LEDs, enabling efficient control over them. In the application scheme of LED non-isolated power supplies, MOSFETs (Insulated Gate Field-Effect Transistors) play a crucial role, enhancing the stability and safety of LED non-isolated power supplies.

Non-isolated LED designs are mainly used in double-insulated products, such as bulb alternatives, where LEDs and the entire product are encapsulated in non-conductive plastic, eliminating the risk of electric shock for end-users.

Due to the direct connection of the input power source in non-isolated circuits to the LED load, there is a risk of electric shock, necessitating compliance with safety standards such as 3C, UL, CE, etc. Insulation and creepage distance design are crucial and require special attention. In such designs, MOSFETs play an essential role in ensuring stable power supply and safe operation of LEDs by controlling the circuit.

In LED non-isolated power supplies, MOSFETs primarily serve the following roles:

Switch control: MOSFETs act as switch components to control the on/off state of LEDs, adjusting their brightness and operational status.

Current driving: MOSFETs can control the current of LEDs, ensuring that LEDs operate within a safe range, thereby extending their lifespan.

Protection functions: MOSFETs can be used for overvoltage and overcurrent protection, safeguarding LEDs from voltage fluctuations or overcurrent damage.

Key considerations for selection include:

Rated voltage and current: Choose MOSFETs suitable for LED loads, ensuring that their rated voltage and current meet design requirements to ensure the stability and safety of LED systems.

On-resistance: Consider the on-resistance of MOSFETs, selecting models with low on-resistance to minimize power consumption and improve efficiency.

Voltage endurance: Select MOSFETs with sufficient voltage endurance to withstand input power source fluctuations and transient conditions, ensuring reliable operation of LED systems.

Packaging and heat dissipation: Select appropriate packaging types and heat dissipation schemes according to actual application requirements, ensuring the stability and reliability of MOSFETs during operation.

Through proper selection and design, MOSFETs can effectively drive and protect LEDs, playing a vital role in LED non-isolated power supplies.

Recommended MOSFETs from VBsemi:

As a renowned semiconductor manufacturer, VBsemi offers a variety of high-quality MOSFET products suitable for LED non-isolated power supplies and other applications. Its products are known for their stability and reliability, widely used in power management, lighting control, and other fields. It is recommended to choose MOSFET product series from VBsemi based on actual requirements, such as selecting appropriate models according to voltage, current, and power requirements, to ensure the performance and safety of LED systems.

Through proper selection and design, MOSFETs can effectively drive and protect LEDs, playing a vital role in LED non-isolated power supplies.