Datasheet Linear Technology LTC4215CUFD#PBF

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Design Notes

• Download
  An Easy Way to Add Auxiliary Control Functions to Hot Swap Cards &mdash DN421
  PDF, 673 Kb, File published: Jul 18, 2007
  Extract from the document

  An Easy Way to Add Auxiliary Control Functions to
  Hot Swap Cards – Design Note 421
  Mark Thoren
  Introduction
  A Hot Swapв„ў controller is essential to any system in
  which boards are inserted into a live backplane. The
  controller must gently ramp up the supply voltage and
  current into the card’s bypass capacitors, thus minimizing disturbances on the backplane and to other cards.
  Likewise, it must disconnect a faulty card from the
  backplane if it draws too much current. The controller
  also monitors undervoltage and overvoltage conditions
  on the backplane supply, ensuring reliable operation of
  the card’s circuitry. The LTC4215-1 takes the obvious
  next step and integrates three general purpose I/O (GPIO)
  lines and an accurate ADC into the Hot Swap controller
  to provide quantitative information on board voltage
  and current. Upgrading to the LTC4215-1 is analogous
  to replacing a car’s venerable “Check Engine” light with
  a modern dashboard information display. RS
  0.004Ω VIN
  12V
  133k
  1% …

Articles

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  Hot Swap Controller Monitors and Reports Power Supply Status &mdash LT Journal
  PDF, 527 Kb, File published: Nov 21, 2006
  Extract from the document

  L DESIGN FEATURES Hot Swap Controller Monitors and
  Reports Power Supply Status by Josh Simonson
  Z1
  SA14A
  CONNECTOR 1 High availability systems are designed
  to achieve an ideal of zero down time.
  To approach this goal, the system
  needs to be able to operate during routine maintenance and upgrades, which
  often involves cards being inserted and
  removed from a live backplane. These
  systems must also be designed for
  failsafe operation by isolating faulty
  boards before they cause backplane
  disturbances.
  Hot swapping requires a power
  switch to initially isolate the board,
  and a controller to turn on the switch
  slowly to minimize backplane disturbances. Since the Hot Swap controller
  monitors card voltage and current, it
  is an obvious place to integrate higher
  level monitoring with a data converter.
  This provides detailed information
  about the health of the power path …

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Manufacturer's Classification

• Monitor, Control and Protection > Hot Swap Controllers > Low Voltage Hot Swap Controllers

Other Names:

LTC4215CUFDPBF, LTC4215CUFD PBF