Hot Topic:
Circuit protection

EDN

• 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...
• 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...
• 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.
• 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.
• 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.
• 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...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...
• 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...
• 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...
• 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.
• 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.
• 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.
• 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. Follow Margery on Twitter at: http://twitter.com/margeryc.
• 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...
• Advanced Analogic Technologies AAT4684: Overvoltage-protection switch shields against USB hot swaps and high-voltage spikes
  
  Date: Nov 7, 2007
  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.
• Digitally managed power circuits
  
  Author: By Terry Cleveland, Microchip Technology | Date: Oct 19, 2007
  Many power circuits need digital control. Those combining digital- and analog-circuit blocks provide the best of both worlds.
• Overvoltage and overcurrent protection increase safety and reliability in charge-management systems
  
  Author: By Patrick Heyer, Texas Instruments | Date: Oct 18, 2007
  Feature Overvoltage and overcurrent protection increase...may fail, resulting in unforeseen overvoltage or overcurrent conditions. Inductive...provide much of a safety margin for overvoltage conditions in a 5V system. ...possibly leading to an explosion. Overvoltage protection traditionally has been...components. A dedicated integrated input overvoltage (OVP) circuit may be faster to...battery voltage. In case of an input overvoltage condition, the IC immediately removes...protection circuit fail. The battery overvoltage threshold B VOVP shown in Figure 2...HYS-BOVP . Each time a battery overvoltage fault occurs, an internal counter...drain output that goes low during overvoltage, overcurrent, and battery- overvoltage events. If the application does...repeatable response. Fully integrated overvoltage, overcurrent, and battery-overvoltage...
• Design Ideas protect against power supply faults
  
  Author: Charles H Small | Date: Oct 11, 2007
  Design Ideas editor Charles H. Small introduces EDN's latest engineer-submitted circuit designs, providing links to related articles from our archives, design resources elsewhere on the Web, and just-plain-fun stuff.
• Circuits protect outputs against overvoltage
  
  Author: Dimitri Danyuk, Kiev, Ukraine; Edited by Charles H Small and Fran Granville | Date: Oct 11, 2007
  Design Idea Circuits protect outputs against overvoltage Adding a solid-state relay and control circuitry to an amplifier's output provides overvoltage protection. Dimitri Danyuk, Kiev, Ukraine...and-measurement applications, you must provide overvoltage protection for the output terminals of amplifiers...of external components to use an SSR for output- overvoltage protection. Rising overvoltage turns off both transistors in IC 2 , interrupting...