Differences from Switching Power Supplies

　　Linear power adapters and switching power supplies differ in several key aspects.

　　In terms of operation principle, linear power adapters work by continuously dissipating power in the form of heat to regulate the output voltage, as described earlier. In contrast, switching power supplies use high - frequency switching elements, such as MOSFETs. These elements rapidly turn on and off, and the output voltage is regulated by controlling the duty cycle (the ratio of on - time to the total switching period) of the switching signal. This results in a more efficient power conversion process as the switching elements dissipate very little power when they are either fully on or fully off.

　　Efficiency is a major differentiator. Switching power supplies are generally much more efficient than linear power adapters. They can achieve efficiencies of up to 90% or even higher in some cases, while linear power adapters typically have efficiencies in the range of 30% - 60%. This higher efficiency of switching power supplies means less power is wasted as heat, which is not only more energy - saving but also reduces the need for extensive cooling mechanisms.

　　Size and weight also vary significantly between the two. Switching power supplies can be much smaller and lighter because they do not require large transformers like linear power adapters. The high - frequency operation in switching power supplies allows for the use of smaller inductors and capacitors, further reducing the overall size and weight. This makes switching power supplies highly suitable for applications where space and weight are constraints, such as in modern smartphones, laptops, and other portable electronics.

　　However, switching power supplies are more complex in design and can generate more electromagnetic interference due to their high - frequency switching operation. In contrast, linear power adapters, with their simpler design and low - frequency operation, produce less EMI, which gives them an edge in applications where a clean power supply with minimal interference is required, such as in audio and some medical equipment.

Read recommendations:

MKS-1202000-36

LED Power Supply 150W

5W Dual USB charger

Power Adapters for In-Vehicle

12V medical power supply suppliers