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PI2211
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PI2211: Recommended Design Steps
There are two options to designing a hot swap solution with the PI2211:
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Utilize PICOR's PI2211 reference design with pre-selected components
Follow PICOR's design guidelines and use the "Picor Calculator Tool" available from Picor's website
Either of these approaches will yield a suitable and reliable hot swap design solution.
PICOR PI2211 Reference Design:
Figure 13 - Final Design Schematic
For this design example we'll define our system requirements as follows:
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Nominal BUS voltage (V BUS ) = 12V
High BUS voltage where controller must be enabled (V BUSHIGH ) = 12.5V
Low BUS voltage where controller must be enabled (V BUSLOW ) = 11.5V
Maximum Operating Current (I MAX ) = 10A
Circuit Breaker Threshold (I CB ) = 13A
Hot-Swap Efficiency > 99%
Schottky Diode is 40V, 1A; required to protect the SCR pin from negative voltage transients that can damage the controller.
The 100Ω series resistor is used to limit current.
Picor Corporation · picorpower.com
PI2211
Rev 1.0, Page 16 of 26
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