Copper Alloy Inductors Stabilize Current Sensing
Apr 1, 2008
For CPU VRM designs, a copper alloy features a more constant dc resistance over temperature than a traditional copper inductor, with little in the way of performance tradeoffs...
Motor Technology Upgrades Cooling Fans
Aug 1, 2006
A novel motor design and driver IC reduce Hall sensor requirements, enabling use of high-efficiency 3-phase brushless dc fans in laptops and other low-cost products....
Data Points
Jun 1, 2006
PoE Controller Integrates PD Designs Silicon Laboratories' Si3400 is described as the industry's most highly integrated, IEEE-802.3af-compliant, power...
Why Is My DC-DC Converter Too Hot?
Jun 1, 2006
The bulleted items on the front page of a dc-dc power module's data sheet often highlight electrical performance that the product cannot actually deliver...
Discrete Components Enable Bold PoE Solutions
Jun 1, 2006
Thanks to IEEE 802.3af, Ethernet data transmission lines may now conduct a specified amount of power. Enabling PoE brings a variety of advantages and...
Sensorless Motor Control Simplifies Washer Drives
Jun 1, 2006
Washing controls have used power inverters to control motor speeds for years. Variable-speed control enables a significant simplification of the mechanical...
Driving Piezoelectric Actuators
Apr 1, 2006
Extraordinarily fast devices that can produce precise motions in subnanometer increments, piezoelectric actuators make unusual demands on the power op amps required to drive them....
Data Points: March 2006
Mar 23, 2006
Chipset improves secondary-side synchronous rectification...
New Products: February 2006
Feb 1, 2006
This issue of Power Electronics Technology features battery-charger ICs, rectifiers, thick film resistors and inductors...
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...
Then and Now
Oct 1, 2005
In this fourth and final article, we turn our attention to products chosen from the November/December 1975 edition of Solid-State Power Conversion, the...
ICs Protect IGBTs and Sense Currents in Motor Drives
Apr 1, 2005
In industrial and appliance motor-drive applications,
high-voltage ICs can provide full IGBT protection
in the inverters and sensorless measurement
of motor currents at low cost....
Easy Calculation Yields Load Transient Response
Feb 1, 2005
Many electronic circuits can rapidly shift between a sleep state and full load operation, placing a heavy requirement on the power converter to stabilize its output voltage. An excessive voltage variation could cause the electronics to malfunction, reset, latch up or fail....
