Power Transformer Attenuates Harmonics
Oct 1, 2004
The mains of the world were constructed as a giant copper causeway to transport electricity from the generating station to our homes and factories. Today's...
Simplifying Power Factor Correction in SMPS
Oct 1, 2004
One in the quest for improved energy efficiency and power quality is the use of active harmonic filter power factor correction (PFC) in switched-mode...
Overpower Compensation for Current-Mode Supplies
Sep 1, 2004
A current-mode power supply works by observing the peak current circulating in an inductance. By adjusting the peak current setpoint at which the power...
DIN Rail Supplies Offer a Range of Options
Sep 1, 2004
Last month's Analog Feedback department discussed some of trends and technical issues shaping the development of DIN Rail power supplies. That article...
SiC Schottky Diodes in Power Factor Correction
Aug 1, 2004
Active Power Factor Correction (PFC) is widely used in today's power supplies. Government regulations and customer requirements must be satisfied when...
Reducing Wasted Startup Current in Offline Supplies
Aug 1, 2004
A switch-mode power supply (SMPS) offers a convenient and efficient way to reduce a large input voltage (the ac mains voltage) to power lower-voltage...
DIN Rail Power Supplies Move Beyond the Factory Floor
Aug 1, 2004
Industrial applications have employed a variety of control voltages over the years, ranging from 440 Vac to 110 Vac to 24 Vdc in more recent years. The...
Impedance Reflections for Multi-Output Converters
Jul 1, 2004
In numerous equipment, a switch-mode power supply (SMPS) delivers various output voltages, each powering different sections. With the introduction of...
Simple, Reliable EN-Compliant Power System
Jul 1, 2004
The recent amendment to EN61000-3-2 has restated the harmonic current limits required for compliance as applied to most professional and industrial equipment...
Ramp Compensation for Current-Mode Converters
Jul 1, 2004
A peak current-mode power supply is subject to subharmonic oscillations if two conditions are met: the converter operates in the continuous conduction...
Microcontroller Enables Digital Control in SMPS
Feb 1, 2004
While DSPs are the primary controllers in uninterruptible power supplies (UPS) with power-factor correction (PFC), ac generation and battery management,...
AC Rectifier Bulk Capacitor Selection with Analysis+SPICE
Nov 1, 2003
This exercise demonstrates how the blend of analysis + simulation/testing can lead to a better understanding of circuit performance, compared to using analysis or simulation/testing alone....
