As an indispensable part of daily life and various work scenarios, the development of lighting systems has witnessed the continuous progress of science and technology. From the initial simple open flame lighting, to the electrical lighting revolution brought about by incandescent bulbs, to the widely used LED lighting today, the lighting system is making great strides towards intelligence, efficiency, and energy saving. Intelligent lighting systems can automatically adjust the brightness and switch status according to factors such as ambient light and personnel activities; efficiency is reflected in higher energy utilization and reduced energy consumption; energy saving is in line with the global environmental protection trend and reduces energy waste.

 1. The key role of MOSFET in lighting systems

Precise dimming : Through PWM technology, MOSFET can accurately control the current to achieve precise adjustment of lamp brightness to meet the needs of different scenarios.

High-efficiency power conversion : Its low on-resistance can reduce energy loss, efficiently convert the power supply voltage into a constant current suitable for LEDs, and improve energy efficiency.

Intelligent control linkage : MOSFET is the bridge connecting the control system and the lamps. It can respond to commands quickly and work with sensors to automatically adjust lighting according to environmental changes.

2. Application examples of VBE1405 and VBE1638 in lighting systems

In the field of lighting systems, VBsemi's VBE1405 and VBE1638 MOSFETs play a key role in different scenarios due to their unique parameter characteristics.

VBE1405 product parameters:

VBE1405: VBE1405 is a single N-type MOSFET, which performs well in high-voltage and high-current applications. Its rated drain-source voltage (VDS) is 40V, the gate-source voltage range (VGS) is ±20V, and the threshold voltage (Vth) is 2.5V. In terms of on-resistance, when VGS is 4.5V, it is only 6mΩ, and when VGS is increased to 10V, it is further reduced to 5mΩ. The maximum drain current (ID) is as high as 85A, using advanced Trench technology and TO252 packaging.

Application : Suitable for driving high-power metal halide lamps in large stadiums. The large current carrying capacity can cope with the start-up impact, and the low on-resistance reduces the loss and ensures smooth and stable dimming.

VBE1638 Product Parameters:

VBE1638 is also a Single N type, with a rated drain-source voltage (VDS) of 60V, a gate-source voltage (VGS) of ±20V, and a threshold voltage (Vth) of 1.7V. When VGS is 4.5V, the drain-source resistance is 30mΩ, which decreases to 25mΩ when VGS is 10V. The maximum drain current (ID) is 45A, using Trench technology, and TO252 package.

Application : Used in low-power LED lamps in smart homes, adapting to common power supply voltage fluctuations, and able to quickly respond to intelligent control commands to achieve energy-saving dimming.

3. Key points for MOSFET selection

Electrical parameter adaptation : Withstand voltage should be 20% - 30% higher than the maximum system voltage; current carrying capacity should be greater than the rated current of the lamp and leave a 20% - 50% margin; on-resistance should be as low as possible. If you want to drive a high-power lamp, choose VBE1405; if you want to deal with voltage fluctuations, you can consider VBE1638.

Performance characteristics considerations : fast switching speed to reduce dimming flicker; good temperature stability and anti-interference ability.

Reliability and safety : Choose products that have undergone rigorous reliability testing. Some high-end products have integrated over-current, overheating, and short-circuit protection functions.

The application of MOSFET in lighting systems has greatly improved the intelligence and efficiency of lighting systems. MOSFETs such as VBE1405 and VBE1638 play an important role in different lighting scenarios due to their own characteristics. With the continuous advancement of technology, the performance of MOSFET will continue to be optimized, injecting new vitality into the development of the lighting industry and promoting lighting systems to move towards a more energy-saving, environmentally friendly, intelligent and convenient direction.