PCI-Bus with 3.3V Auxiliary Hot Swap Controller


Posted on Feb 5, 2014

The LTC ®4241 is a Hot Swap controller that allows a board to be safely inserted and removed from a live PCI-bus slot. It has a primary controller that controls the four PCI supplies and an independent auxiliary controller to controlthe 3. 3V auxiliary supply. External N-channel transistors are used to control the 3. 3V, 5V and 3. 3V auxiliary suppli


PCI-Bus with 3.3V Auxiliary Hot Swap Controller
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es while on-chip switches control the 12V and 12V supplies. The 3. 3V, 5V and 3. 3V auxiliary supplies can be ramped upat an adjustable rate. Electronic circuit breakers protect all five supplies against overcurrent faults. The foldback current limit feature reduces current spikes and power dissipation when shorts occur. The PWRGD output of the primary controller indicates when all four PCI supplies are within tolerance. The FAULT output indicates an overcurrent condition for any of the five supplies.




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