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.
• Circuit protection for outdoor LED lighting
  
  Author: By Phillip Havens, Littelfuse | Date: Mar 3, 2010
  Feature Circuit protection for outdoor LED...add the proper circuit protection to guard against the most severe overvoltage conditions...against transient overvoltage events. Two...of transient overvoltage have long been...susceptible to overvoltage transients caused...immediate threat is overvoltage failures. In...where effective circuit protection will increase...case of handling overvoltage events and dealing...automatically when the overvoltage is gone. However...trigger of an overvoltage event and reset...than MOVs. Overvoltage devices have...activated based on an overvoltage condition. The...deals with proper circuit protection for the LEDs...devices provide overvoltage protection to...Therefore, when the overvoltage protection device...
• EDN: Information, News, & Business Strategy for Electronics Design Engineers
  
  EDN: Information, News, & Business Strategy for Electronics Design Engineers EDN.com is a comprehensive information source for the EOEM (electronics original equipment manufacturer) segment, providing in-depth technical information for electronics design engineers and news and strategic business
• FROM EDN EUROPE: Linear regulators face extinction
  
  Author: By David Marsh, Contributing Technical Editor |
  ...800-msec auto-restart cycle that provides overload and short- circuit protection until the fault condition recedes. Cost-wise, estimates...switch-element stress. Protection mechanisms guard against overvoltage, overtemperature and overcurrent on a cycle-by-cycle...monitor conditions including supply-line under- and overvoltage, chip overtemperature, and current in the output-driver...
• 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...
• 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.
• 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.
• 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.
• 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...transient-voltage-suppression) diodes for overvoltage, and fuses and PTC (positive-temperature-coefficient...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-effective...resistors on line cards that use overvoltage protectors that cannot withstand...
• 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.
• 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...
• 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...
• 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...
• Fairchild Semiconductor FSA800: USB accessory switch includes negative-swing capability
  
  Date: Jan 28, 2010
  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.
• FPGA Gurus | EDN
  
  Tier Logic has gotten the occasional mention in this blog as a startup specializing in 3D interconnect, but after the splash made by players such a... • read more
• 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...
• 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 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.
• 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.
• Maxim Integrated Products DS2726: Stand-alone protection IC integrates cell balancing
  
  Date: Nov 4, 2008
  ...FET drivers and cell balancing with fault-monitoring into the device provides overvoltage, undervoltage, discharge-current, and short- circuit protection. The IC requires no external microcontroller. Available in a 7×7-mm TQFN-32...