Bead Inductor Meets CPU Power Challenges
Apr 1, 2007
Ferrite-based power beads, an alternative to wound-toroid inductors, offer greater efficiency, tighter tolerances and smaller size in VCORE voltage regulators. ...
Flybacks Charge Xenon Flash Capacitors
Mar 1, 2007
The popular Xenon photoflash bulb is typically driven by
a battery-powered high-voltge source. A flyback converter
based on peak current limiting is the best option for this
circuit in portable applications....
High-Frequency DC-DC Converters: The Writing Is On the Wall
Jan 23, 2007
Unprecedented demand for featured-laden handheld electronic appliances and laptops has meant more demand for processors. This translates to greater needs for higher current and power at voltages that will soon approach the fractional voltage range from the dc-dc converters in these appliances....
Digital Bus Makes Current Sharing More Robust
Nov 1, 2006
Power supplies in servers, storage and telecom systems often employ redundant topologies. This means that multiple supplies connected in parallel provide...
Digital Control Measures In-System Response
Nov 1, 2006
Digital power solutions make it possible to measure power-stage frequency response in the application, opening the door to new capabilities such as auto-tuning, power-stage diagnosis
and on-the-fly adaptability....
Ferrite Out Better Core Materials For Your POL Design
Oct 1, 2006
The latest generation of powdered-iron and ferrite materials for inductor cores provide power designers with new options for increased efficiency or power density in dc-dc converters....
xDSL Pushes DC-DC Converters to Higher Frequencies
Oct 1, 2006
The throughput or user bit rate for xDSL is highly dependent on the receiver's signal-to-interference ratio (SIR). There are many sources of interference...
High-Voltage TMBS Diodes Challenge Planar Schottkys
Oct 1, 2006
Trench MOS barrier Schottky diodes combine low VF and high-speed switching with improved protection from voltage transients, enabling the benefits of conventional planar Schottkys in 100-V and 120-V applications....
COTS Approach Cuts Cost for Mil-Spec DC-DC Converters
Oct 1, 2006
Available in 5-W, 15-W and 35-W ratings, XP Power's MTC series of dc-dc converters is a standard product family developed exclusively for defense and...
Keeping Parts Cost Down in Mobile CPU Power Supplies
Oct 1, 2006
New multiphase buck controllers with high-speed feedback loops limit requirements for external capacitance, permitting smaller, less expensive design than older controllers....
Product of the Year: Texas Instruments' TPS40140 Synchronous PWM Controller
Oct 1, 2006
This year's Power Electronics Technology Product of the Year award winner is an analog controller that simplifies the potentially complex task of paralleling voltage sources to create a scalable POL power designs....
USB Port Powers Bipolar Supply
Sep 1, 2006
The USB port on most personal computers can be a handy source of power. It is not allowed to deliver the maximum specified current (500 mA) without software...
Buck Converters Squeeze into Tiny QFNs
Sep 1, 2006
Using its multi-megahertz switching and co-packaged inductor technology, Enpirion has expanded its lineup of integrated buck converters with tiny footprints...
Driving Automotive Power Supplies to Higher Frequencies
Sep 1, 2006
If protected against load dumps and other transients, switching regulators with relatively low voltage ratings can be configured to operate efficiently at high switching frequencies....
Control Method Solves Low Duty-Cycle Dilemmas
Sep 1, 2006
A variation on peak-current-mode control eliminates blanking
time during inductor current sensing, enabling shorter
on-times for the high-side FETs used in buck regulators....
