Sager Power Systems, a specialized group of Sager Electronics, offers a dedicated sales force of power systems sales engineers concentrated on power, thermal management and battery solutions with the unique position of providing traditional distribution services and value-added design. Sager is focused on bringing our customers the newest products, technical design information and design support to support our customers’ application requirements.
Choosing the Right PSU Matters
AC-DC power supplies are essential in many end applications as major power supply units (PSUs). More and more, power supply manufacturers provide a wide variety of options to engineers. While some PSUs may be suitable to your device, others may not due to the design of the PSU. Therefore, selecting the right PSU for your specific requirement is an important factor in the success of your project.
- Class I or Class II for your system
- Heat dissipation to the power supply
Class I or Class II for Your Application?
The PSU is the key component in making your device work. The first thing to determine is if your end application has a ground (earth) connection.
If the system design of the device includes a ground connection, a Class I power supply is the correct choice. If the design does not include a ground connection, a Class II power supply is the best option. The EMC testing result is deeply affected by the choice of the power supply, making it a critical factor during the selection process.
In many cases, when an end application is a portable device, it’s common for a Class II power supply to be selected. The reason for choosing a Class II power supply is due to the increased uncertainty surrounding the AC power source in these types of devices; there is limited knowledge of the AC source’s connection with the ground. In other cases, Class I power supplies are chosen.
For the user’s convenience, unlike many power supplies which only have one version, Cincon also developed several series which can be used as either Class I or Class II with more options under development.
