PI2121
Cool-ORing
TM
Series
8 Volt, 24 Amp Full-Function Active ORing Solution
Description
The
Cool-ORing
TM
PI2121 is a complete full-function
Active ORing solution with a high-speed ORing
MOSFET controller and a very low on-state
resistance MOSFET designed for use in redundant
power system architectures. The PI2121
Cool-ORing
solution is offered in an extremely small, thermally
enhanced 5mm x 7mm LGA package and can be
used in low voltage (≤ 5Vbus) high side Active ORing
applications. The PI2121 enables extremely low
power loss with fast dynamic response to fault
conditions, critical for high availability systems. A
master/slave feature allows the paralleling of PI2121
solutions
for
high
current
Active
ORing
requirements.
The PI2121, with its 1.5mΩ internal MOSFET
provides very high efficiency and low power loss
during steady state operation, while achieving high-
speed turn-off of the internal MOSFET during input
power source fault conditions that cause reverse
current flow. The PI2121 provides an active low
fault flag output to the system during excessive
forward current, light load, reverse current, over-
voltage, under-voltage and over-temperature fault
conditions. A temperature sensing function indicates
a fault if the maximum junction temperature exceeds
160°C. The under-voltage and over-voltage
thresholds are programmable via an external resistor
divider.
Features
•
•
•
•
•
•
•
•
•
Integrated High Performance 24A, 1.5mΩ
MOSFET
Very-small, high density fully-optimized solution
providing simple PCB layout.
Fast Dynamic Response to Power Source
failures, with 160ns reverse current turn-off
delay time
Accurate sensing capability to indicate system
fault conditions
Programmable under & over-voltage functions
Over temperature fault detection
Adjustable reverse current blanking timer
Master/Slave I/O for paralleling
Active low fault flag output
Applications
•
•
•
•
•
N+1 Redundant Power Systems
Servers & High End Computing
Telecom Systems
High-side Active ORing
High current Active ORing (≤ 5Vbus)
Package Information
•
17-pin 5mm x 7mm Thermally Enhanced LGA
Package
Typical Application:
Figure 2:
Figure 1: PI2121
High Side Active ORing
Picor Corporation • picorpower.com
PI2121 input current de-rating based on maximum
T
J
=150°C vs. ambient temperature
Rev. 1.0
Page
1 of 21
PI2121
VICOR [ VICOR CORPORATION ]
