Gate Drive May Be the Culprit When Q is Low
Nov 1, 2007
MOSFET switching determined to be the source of the
damping resistance, as demonstrated using a forward
converter SPICE model....
Product of the Year: LDO Redesign Creates a More Versatile Regulator
Oct 1, 2007
Ultimately, the device selected for Product of the Year award must offer a refreshing combination of novelty and usefulness. Linear Technology's LT3080, an adjustable 1.1-A low-dropout regulator, appears rich in both qualities....
Monolithic Regulators Migrate to Higher Voltages
Aug 1, 2007
Several new regulator chips are springing up to address higher-voltage and higher-power requirements for buck converters. Like their low-voltage counterparts, these monolithic regulators promise high efficiency and compact designs....
Regulators Embed Inductors to Save Space and Ease Use
Jul 1, 2007
Application requirements for compact, easy-to-use voltage regulators with better efficiency than LDOs is spurring the development of a new class of buck-converter ICs....
Voltage Detector Provides Sensitivity and Precision
Feb 1, 2007
A function often needed in industrial and scientific applications is detecting the presence - or absence - of dc voltages in such components as safety interlocks and automatic sequencers....
Voltage Regulators Rev Up PWM-Based Fan Control
Nov 1, 2006
The simplest of fan-control schemes an on-off switch is simple but inefficient, because it provides more cooling than necessary most of the time. When...
Bootstrap Feedback Linearizes Current Source
Nov 1, 2006
Adjustable current sources often exhibit a nonlinear
control characteristic, but the inclusion of bootstrap feedback provides an inherently linear control that works well at all levels of
output current....
Shedding Light on HID Ballast Control
Oct 1, 2006
Aided by a new full-bridge controller, a popular electronic HID ballast topology manages lamp operation, while enhancing lamp safety....
Single Boost Converter Builds Dual Polarity Supply
Sep 1, 2006
Adding charge pump and LDO components to a boost
converter circuit creates a cost-effective power supply for LCDs and other portable applications....
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...
Protecting Flybacks Against Short Circuits
Aug 1, 2006
Delays in short-circuit protection triggers require careful selection of the magnectics and overcurrent threshold values to prevent component stress....
Slope Compensation for Mild Inductor Saturation
Aug 1, 2006
Peak current control has long been a popular PWM method in switching power supplies and has the equally well-known characteristic that when operating in continuous conduction mode...
Controller Generates Multi- and Single-Phase Outputs
Aug 1, 2006
The TPS40140 synchronous, PWM controller from Texas Instruments operates as a standalone device that generates two outputs, or as a two-channel, multiphase controller....
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...
IBCs Power Advanced Telecom Systems
Jun 1, 2006
Most major telecom companies now regard Advanced Telecom Computing Architecture (AdvancedTCA) as the way of the future. Based on an open-standard architecture,...
