Chapter 249

An easy way to add auxiliary control functions to hot swap cards

Mark Thoren


The LTC4215-1, a smart power gateway for Hot Swap circuits, is described.


Hot Swap controller



A Hot Swap 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 ...

Get Analog Circuit Design Volume Three now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.