New Picor Hot-Swap Controller
for Safe, Continuous System Operation

February 7, 2012

It’s been a busy week for Vicor product launches.  In addition to the QPI-21 high density active EMI filter, the new Picor Cool-Swap™ PI2211 hot swap controller and circuit breaker was released yesterday at APEC.  Featuring Picor’s advanced True-SOA™ and Glitch-Catcher technologies, the innovative Picor Cool-Swap PI2211 ensures safe MOSFET operation by digitally emulating MOSFET transient thermal performance.  It provides superior backplane and system protection while reducing board space and design complexity.

The Cool-Swap PI2211’s programmable True-SOA feature ensures safe, reliable operation at both the system and MOSFET level during both circuit card insertion and steady state operation. The True-SOA feature provides MOSFET protection in the most ideal way possible by emulating the transient thermal performance of the specific MOSFET in use. By emulating MOSFET thermal behavior and digitally calculating the MOSFET junction temperature rise using the MOSFET manufacturers’ transient thermal impedance data, the Cool-Swap PI2211 can adapt its control, start-up and thermal cycling to the specific user-selected external N-channel MOSFET requirements, ensuring safe operating limits regardless of load and line conditions. Typical industry practice attempts this level of protection by simple timer-based constant power limiting which does not allow for MOSFET optimization and forces designers to oversize the MOSFET, increasing board area use and cost.

The Picor Cool-Swap PI2211, with its Glitch-Catcher voltage suppression technology, also mitigates the need for large external protection components by diminishing transient overshoot events and maintaining compliance with the specified voltage ratings. During a circuit breaker event, the PI2211’s internal Glitch-Catcher voltage suppression circuit controls the MOSFET to act as an active snubber, passing potentially high inductive bus energy through the MOSFET to limit overvoltage exposure. By shunting the energy through the MOSFET to the low impedance load, the PI2211 not only eliminates the need for external protection components but further reduces overall cost and total solution size.


  • Operating range: +0.9 to +14V
  • Programmable inrush current limiting
  • Programmable MOSFET True-SOA™ Protection
  • Programmable circuit breaker with Glitch-Catcher™ voltage suppression
  • 100nS circuit breaker fault detection time
  • Adjustable Input Under-voltage Lockout (UVLO) with hysteresis
  • Adjustable Input Over-voltage Lockout (OVLO) with hysteresis
  • Power good status indicator
  • Wide operation temperature from -40°C to 125°C

For product page, including data sheet, go to: Cool-Swap™ – PI2211

Tags: ,

Comments are closed.

Find out more about our Cool-Power Buck Regulators subscribe to vicor newsletter Contact Us

Get Connected