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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...

Designing Switchmode Transformers for Optimum Efficiency
Jun 1, 2004
Among the first decisions engineers must make when designing a new switchmode power supply are transformer size, working frequency and the selection of...

Generic Control Scheme Transforms Power Design
Apr 1, 2004
A new architecture exploits digital signal processing to enable scalability and design reuse in power systems....

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....

Why Opt for IGBTs in SMPS Applications?
Jul 1, 2003
Recent advancements and optimized tradeoffs have resulted in much improved IGBT performance....

DSPs Simplify Digital Control Implementation of SMPS
Jul 1, 2003
Supplies today are adding functions to make the system power source more robust, reliable, intelligent, and efficient....

Test Diagnosis Software Verifies SMPS Design
Jul 1, 2003
Using the fault and test diagnosis software, a design can be fully tested for potential part failures....

Thermal Design and Packaging for Proper Power Management
Jun 1, 2003
Packaging and thermal design are driven by increased power density and the many trade-offs in power topology selection....

Power Converter Synthesis Part 4: Near Zero Emissions
Jun 1, 2003
Implementing active clamp technique for single-ended flyback and forward converter designs enhances efficiency at high switching frequencies while lowering component stresses....

Active Clamp Control Boosts Forward Converter Efficiency
Jun 1, 2003
Implementing active clamp technique for single-ended flyback and forward converter designs enhances efficiency at high switching frequencies while lowering component stresses....

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