Category | April

On the Pulse of Power Electronics

Posted on 10 July 2012

      The desaturation behaviour of the IGBT allows to turn them off by the IGBT driver Just about 30 years ago, fast thyristors, RCTs, GATTs as well as GTO and BJT were the best components available at the time for power electronics. Each 100V reverse voltage upwards was keenly fought over, each microsecond [...]

Wide Input, Low Output POL Regulators

Posted on 10 July 2012

      Delivery of Benchmark Efficiency With High Density Capable of handling input voltages as wide as 1.5V to 16V, the second generation integrated point-of-load (POL) regulators are designed to deliver output voltages from 0.7V to 12V at peak efficiency greater than 96%. Thanks to programmable switching frequencies up to 1.5 MHz, this voltage [...]

A New Generation of Lower Power Consumption Power ICs

Posted on 10 July 2012

      Reducing switching frequency at no load for lower power consumption Today's environmental concerns are more complex, far-reaching and interconnected than in the past, and using energy more efficiently has become a global mandate. In recent years, consumer power supplies are encouraged to abide by energy-saving specifications, such as California Energy Commission (CEC) [...]

Simple Digital

Posted on 10 July 2012

      The Novum Digital family has focused on ease of use It is nearly impossible to miss an article about the growing digital power market. Engineering publications are loaded with market analysts’ comments on the potential of digital power and announcements regarding new digital power products from leading IC companies. These serve to [...]

Wideband High Temperature Optocoupler

Posted on 10 July 2012

      Serving isolated AC/DC and DC/DC converters in HEV and PHEV Isolated AC/DC and DC/DC converters for onboard charger and power supply in HEV and PHEV require careful examination of popular phototransistor optocouplers as error amplifier feedback. Various performance challenges surface to meet high temperature environment up to 125°C, long operating life time [...]

Power Modules in High-End Market Segments

Posted on 10 July 2012

      A low output ripple is mandatory as well when supplying analogue systems The new SIMPLE SWITCHER® Power Modules from National Semiconductor reach the highest possible level of “Ease of Use” by integrating an inductor and a monolithic synchronous regulator within one power package. Professional power designers have far more requirements than “Ease [...]

Time Resolved in Situ Chip Temperature Measurements during Inverter Operation

Posted on 10 July 2012

      The IR camera is the best choice for temperature measurements at lower voltages The device temperature is one of the most critical parameters in the dimensioning of an inverter. However, experimental studies focusing on the virtual junction temperature Tvj in running inverters are scarcely found. The feasibility of four different practical methods [...]

Electrolytic Capacitor Lifetime Estimation

Posted on 10 July 2012

      Key parameters are necessary to predict lifetime Aluminum Electrolytic Capacitors (“elcaps”) are essential for the function of many electronic devices. Frequently, the lifetime of these devices is directly linked to the lifetime of the elcaps [9]. By Dr. Arne Albertsen, JIANGHAI EUROPE GmbH   This article reviews the construction of elcaps and [...]