New Products: February 2006
Feb 1, 2006
This issue of Power Electronics Technology features battery-charger ICs, rectifiers, thick film resistors and inductors...
Digital Feedback Controls Supply Voltage Accurately
Jan 1, 2006
The goal of this project was to design and build an efficient power supply system whose output voltage could be accurately set to a digitally selected...
New Products: January 2006
Jan 1, 2006
This issue of Power Electronics Technology features new fan speed controllers, stepdown controllers, power supply kits, automotive-qualified switches, and more...
Data Points
Nov 1, 2005
Battery Technology Will Dominate Portable Power for Next Decade According to a report from NanoMarkets, battery technology particularly Li-ion and Li-polymer...
Tiny DC-DC Converter Supports Wide Input Voltage Range
Nov 1, 2005
The LTM4600 from Linear Technology is a complete stepdown dc-dc converter packaged in a 15-mm 15-mm 2.8-mm land grid array (LGA). This module, Linear's...
Designing Single-Switch Forward Converters
Oct 1, 2005
Often used in dc-dc converter modules for power levels below 100 W, single-transistor, resonant reset forward converters are also useful for dc-dc converters with adjustable output voltages....
Nondissipative Clamping Benefits DC-DC Converters
Sep 1, 2005
Even if small, a transformer's leakage inductance reduces the efficiency of some isolated dc-dc converter topologies. However, the technique of lossless voltage clamping helps restore most of the lost energy....
Then and Now
Sep 1, 2005
As we continue our Then and Now series, we once again will look at three products selected from a 1975 edition of Solid-State Power Conversion, the predecessor...
Optimizing Voltage Selection in Buck Converters
Jun 1, 2005
Understanding the impact of input voltage and
gate-drive voltage on MOSFET power losses
enables designers to achieve maximum efficiency
in the design of synchronous buck converters....
Back to the Future with Magnetic Modulation
Jun 1, 2005
More than two decades ago, I was responsible for developing the two ac-dc power supplies that would ultimately be used in the AN/ALQ-184 Radar Jammer...
Shunt Regulator Design Enhances LDO Reliability
May 1, 2005
Unlike high-current LDOs that rely on series regulator techniques, a discrete LDO design based on a shunt regulator offers foldback
current limiting and fast transient response....
Managing Board Design For LGA Power Converters
May 1, 2005
As some of the newer dc-dc point-of-load (POL) converters are packaged into smaller and smaller surface-mount packages, thermal and electrical layout...
MOSFET Susceptibility to Cross Conduction
Apr 1, 2005
A key to success in designing a synchronous buck
converter is limiting the shoot-through or cross
conduction of its power MOSFETs. Using mathematical
formulas, designers can determine the
suitability of a specific device for use as a synchronous
rectifier in the converter....
Inductor Current-Sensing Boosts Regulator Efficiency
Apr 1, 2005
The lossless-inductor approach to voltageregulator current-sensing requires power
supply designers to understand how magnetic tolerances and variations affect ripple current, load sharing, efficiency and other aspects of the design....
