Hot Topic:
Circuit protection

EDN

• Use simultaneous-sampling ADCs to monitor three-phase ac line power
  
  Author: By Martin Mason, Maxim Integrated Products | Date: Aug 18, 2009
  Multichannel simultaneous-sampling analog-to-digital converters trim your costs while simplifying power-monitoring systems.
• Draw the line: Isolation shields systems from shocking surprises
  
  Author: By Paul Rako, Technical Editor | Date: Sep 3, 2009
  ...the resulting break in the leakage current produces an overvoltage at the site of the discontinuity, generating an electric...insulation for the correct operation of the equipment OVERVOLTAGE-INSTALLATION CATEGORY: coordination by identifying the...
• Designing protective circuitry for DSL loops: Beware of pitfalls
  
  Author: By Phillip Havens, Littelfuse LP | Date: Dec 5, 2008
  ...protection from a variety of overvoltage conditions, but the need to...Normal Signals A glossary of overvoltage-protection devices A glossary...circuit design and choice of circuit- protection devices must take these differences...voltage-suppression) diodes for overvoltage, and fuses and PTC (positive...and ring to ground to provide overvoltage protection, preceding them with...transformer, another TSPD can provide overvoltage protection. The ATU-C...suppliers that offer all the circuit- protection technologies and are therefore...the other. A glossary of overvoltage-protection devices GDTs...use primarily as the principal overvoltage protector in telecom and datacom...properly coordinate them with an overvoltage protector, they offer cost...resistors on line cards that use overvoltage protectors that cannot withstand...
• Lithium-ion battery charger provides USB OTG capability
  
  Author: By Jinrong Qian, PhD, Texas Instruments | Date: Jan 22, 2009
  With users demanding communication among their mobile devices, supporting the power needs of USB OTG (On-The-Go) becomes a requirement. Optimize your battery chargers for a current-limited source, such as USB, and for supporting USB OTG specifications.
• USB battery-charger designs meet new industry standards
  
  Author: By Takashi Kanamori and George Paparrizos, Summit Microelectronics | Date: Feb 21, 2008
  ...Reference 5). In addition, this charging IC incorporates input overvoltage protection that suspends operation when the charger voltage...2V. Additional protection features, including battery- overvoltage and -overcurrent protection, meet the industry’s strict...
• Dual-input charger IC operates from USB or wall adapter
  
  Author: By Paul Rako, Technical Editor | Date: Jan 15, 2009
  Advanced Analogic Technologies has introduced the AAT3691 dual-input battery-charger IC with overvoltage protection to 28V with a response time of less than 1 µsec.
• Flyback transformer enables high power-factor and converter efficiency
  
  Author: By Cecil Deisch, Tellabs Operations Inc | Date: Mar 6, 2008
  Ever-tightening regulations require a power factor of at least 0.9 and high efficiency for offline power supplies. This new switching-converter topology uses a flyback transformer and accomplishes both these goals in one stage.
• Use analog switches to multiplex your signals
  
  Author: By Paul Rako, Technical Editor | Date: Jun 12, 2008
  Pay careful attention to analog switches and multiplexers, which are critical components of the signal path. Designers should understand the applications and specifications of these important analog parts.
• TDK Lambda PXA and PXB: 15W dc/dc converters come in open-frame and shielded-metal-case options
  
  Date: Aug 31, 2009
  ...on/off and output adjustment, including trim, single-output models, and devices with overvoltage and overcurrent/ short- circuit protection are also available. Measuring 1×1-in. each, devices in the PXA and PXB series cost...
• A –48V hot-swap-controller design targets high-power blades
  
  Author: By Shyam Chandra, Lattice Semiconductor | Date: Nov 19, 2007
  ...backplane voltage below which the brownout process begins. Overvoltage lock down: This parameter shuts off the MOSFET to protect...blade. Improved immunity to brownouts, overcurrent and overvoltage protection, and automatic retry in case of faults further...
• FROM EDN EUROPE: Linear regulators face extinction
  
  Author: By David Marsh, Contributing Technical Editor | Date: Oct 13, 2005
  ...msec auto-restart cycle that provides overload and short- circuit protection until the fault condition recedes. Cost-wise, estimates...element stress. Protection mechanisms guard against overvoltage, overtemperature and overcurrent on a cycle-by...monitor conditions including supply-line under- and overvoltage, chip overtemperature, and current in the output-driver...
• Fast-settling picoammeter circuit handles wide voltage range
  
  Author: Rob Whitehouse, Analog Devices, Wilmington, MA; Edited by Brad Thompson and Fran Granville | Date: Sep 14, 2006
  ...diode carries a 45V maximum rating, and the buffers provide overvoltage protection by limiting the voltages applied across the diodes...followers Q 6B and Q 7B . Transistors Q 6A and Q 7A provide overvoltage protection when a defective device under test short-circuits...
• Maxim Integrated Products MAX14527 and MAX14528: Overvoltage protectors guard against 28V faults
  
  Date: Apr 2, 2009
  EDN's technical editors highlight notable new products including analog and digital ICs, power components, sensors, passives, boards and systems, software, and more. To submit products for consideration, please see the information on our Editorial Opportunities page.
• Add a grounded-switch feature for Topswitch on/off control
  
  Author: Robert N Buono, Aeolian Audio LLC, Bloomfield, NJ; Edited by Charles H Small and Fran Granville | Date: Jun 21, 2007
  Adding a couple of components to the control pin of a Topswitch switching regulator enables on/off control.
• Maxim Integrated Products DS2726: Lithium-ion protector provides cell-balancing for five- to 10-cell battery packs
  
  Date: Dec 2, 2008
  ...applications using a five- to 10-cell lithium-ion battery pack. Features include overvoltage, undervoltage, discharge-current, and short- circuit protection, as well as allowing configuration with no external microcontroller. The IC...
• An exercise in balance
  
  Author: By Barbara Jorgensen, Senior Editor | Date: Oct 1, 2006
  Anyone who has spent any time in electronics distribution will readily admit it's a male-dominated industry. That's not to say it doesn't give talented women—such as Tyco's Carla Mahrt—their due. Mahrt this year was elected the first woman to head the industry's 70-year-old premiere event: the
• Online tips for application-specific circuit protection
  
  Author: Margery Conner | Date: Feb 24, 2008
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies.
• Q&A with Carla Mahrt of Tyco Electronics
  
  Author: By Barbara Jorgensen, Senior Editor | Date: Sep 26, 2006
  One of the most respected people in the industry is Carla Mahrt of Tyco Electronics. In this candid interview she reveals her best job, worst job and shares other personal insights about the industry.
• ON Semiconductor NCP361: Overvoltage-protection controller disconnects during wall-adapter overvoltage
  
  Date: Mar 25, 2008
  EDN's technical editors highlight notable new products including analog and digital ICs, power components, sensors, passives, boards and systems, software, and more. To submit products for consideration, please see the information on our Editorial Opportunities page.
• EDN: Information, News, & Business Strategy for Electronics Design Engineers
  
  EDN.com is a comprehensive information source for providing in-depth technical information for electronics design engineers and news and business strategy insight for executives