Technical Bulletin

Technical Bulletin – October 2019

Specification Demystification: Understanding Power Supply Hold-Up Time Introduction While many of the developed world’s power grids are robust and mature systems, they are not perfect. The mains voltage (available from the outlets in homes, offices, hospitals and other facilities), supplying power to the electrical devices we use every day, is vulnerable to a number of […]

Technical Bulletin – August 2019

Installation Considerations for Internal Power Supplies Introduction AC/DC power supplies can be classified into a broad array of genera depending on their physical construction and intended end use. These genera can be placed into one of two primary families, internal or external. Internal power supplies are those which, as the name suggests, will be installed […]

Technical Bulletin – July 2019

Burst-Mode Operation: A Double-Edged Sword Introduction In response to ever evolving power supply efficiency standards, power supply manufacturers are using burst-mode operation (amongst a sea of other energy saving strategies) to decrease the standby power consumption of external power adaptors. Efficient conversion techniques do not come without some cost. Burstmode operation can have adverse, and […]

Technical Bulletin – April 2019

Thermal Considerations for the Application of Power Converters Introduction One of the first questions one should ask themselves when selecting an appropriate AC/DC power supply for a given application is what sort of environment that device will be expected to operate in. A power supply that is intended to spend its operational life on the […]

Technical Bulletin – March 2019

The AC in Your DC: An Overview of Ripple & Noise Introduction The output of an AC/DC power converter is not necessarily a pure direct current waveform. In fact the DC output is actually a superimposition of some desired constant voltage and two AC artifacts known as ripple and noise. The relative magnitude of these […]

Technical Bulletin – February 2019

Loading Constraints: Understanding Maximum Capacitance Introduction The average PCB is home to an assortment of passive circuit elements, often including a broad array of capacitors of different types, ratings, and values. A capacitors sole function from a fundamental physical perspective is to store electric potential energy within an electric field between its electrodes. Circuit designers […]

Technical Bulletin – January 2019

The Case of the Missing Energy An Overview of AC/DC Conversion Losses Introduction What constitutes an ideal system? This is vague question that is sure to yield a multitude of different responses depending on who you ask. If you ask a power electronics engineer, they will probably tell you that an ideal system is one […]

Technical Bulletin – December 2018

Safety Approvals: The PSE Mark Introduction Japan is widely considered to have the third largest economy in the world. It is no surprise that Japan is an appealing market for the sale of all sorts of goods, including electronics. However, to sell a product into the Japanese market manufacturers must first obtain all of the […]

Technical Bulletin – November 2018

Going the Distance: DC Cable Length Consideration Introduction Here at Power Partners, a significant majority of our business is in developing modified-standard AC/DC converters, tailoring one of our off-the-shelf solutions to meet the more particular needs of a specific application. The modifications we have developed over the years span a wide range of technical challenges, […]

Technical Bulletin – September 2018 (2)

Safety Approvals: Limited Power Sources and Types of Limiting Introduction Most industrial AC/DC power supply labels are littered with a wide assortment of agency approval marks. In examining the approval marks on lower-power adaptors, one may occasionally come across the three letter acronym: LPS. We receive inquiries almost weekly regarding the LPS compliance of our […]