TDK Corporation introduces the HWS3000 programmable AC-DC power supplies in the TDK-Lambda series. These units deliver up to 3000 watts in a 270 x 150 x 61mm case size. The HWS3000 offers programmable output voltages of 24V, 48V, 60V, or 130V, with the ability to adjust from zero to maximum rating. Engineers can choose between […]
Single-phase
Single-phase EMI filters for AC and DC applications
TDK Corporation has expanded its portfolio of single-phase EMC filters with the B84742A*R725 series. These components serve AC as well as DC applications up to 250 V and rated currents from 6 A to 30 A. This means they can be used for increasingly popular DC infrastructure in the industrial and building sectors. Available in […]
Calculations reveal the value of efficiency
A few back-of-the-envelope estimates show why it pays to maximize power supply efficiency. Chris Harman • Puls l.p. Engineers are becoming more sensitive to efficiency when selecting a power supply. Energy flows through the supply, and something less than 100% of that energy can be used because of inefficiencies of power supply components. The difference […]
Medical 180-W ac/dc supplies fit in 2×3-in package
High-power density medical ac/dc power supplies of the MAD180 series can deliver up to 180 W and 150 W with just natural convection cooling. Additionally, up to 220-W peak output power for five seconds is available with forced-air cooling. This series is featured with 2XMOPP insulation, low leakage current less than 100 µA, and is […]
Power supply regulations, requirements, and standards
Regulatory standards cover safety and electromagnetic compatibility (EMC) and efficiency. Safety and EMC standards are relatively straightforward, and their numbers are limited. Efficiency is a different matter: Society’s drive to reduce greenhouse gas emissions results in increasingly sophisticated energy efficiency standards for all types of power converters. It started with relatively simple ENERGY STAR standards […]
Gains from GaN
Energy efficiencies made possible by gallium-nitride semiconductors are starting to impact every day products. Paul Wiener • GaN Systems, Inc. | Ron Stull • CUI, Inc. Wide-bandgap power semiconductors are in production now and recommended for new designs. The earliest adopters among power supply OEMs have already begun introducing new product lines employing this technology […]
Identifying the right medical power supply
Special considerations apply for power supplies when even small electrical currents pose a shock hazard. Dermot Flynn, Chris Jones • Advanced Energy The consequences of leakage current came to the forefront in the 1970s, and since then technical standards for the safety and effectiveness of medical electrical equipment have evolved to become the most stringent […]
Sager Electronics to handle Vox Power VCCS300 conduction-cooled ac/dc supplies
The Vox Power VCCS300 series of conduction-cooled ac/dc power supplies are 300-W units producing continuous output power in just a 2x4x1.61-in package. The all-in-one solution can be cooled using conduction, convection, or forced air cooling techniques. The VCCS300 series is a candidate for power solutions in applications where high efficiency, rugged reliability, silent operation, and […]
Reference design based on 4-kW high-efficiency single-phase ac-dc evaluation board
A new power supply reference design enables engineers to identify and correct design errors before building hardware, thereby lowering product costs and speeding time to market. Switched-mode power supplies provide greater efficiency, increased power density and lower overall system costs when using GaN devices. However, GaN, a high switching speed, high performance wide bandgap semiconductor, […]
Picking reliable power supplies
A few basic parameters can be useful for selecting power supplies that must work dependably in specific application scenarios. Alex Karapetian Acopian Power Supplies Electronic devices require a reliable source that can supply power at all times. But power supplies are available in a wide range of voltage and current ratings. Engineers tasked with selecting […]
