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Vicor Corporation

PI2125 Datasheet Preview

PI2125 Datasheet

12 Amp Full-Function Active ORing Solution

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PI2125
Cool-ORingTM Series
30 Volt, 12 Amp Full-Function Active ORing Solution
Description
The Cool-ORingTM PI2125 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 PI2125 Cool-ORing
solution is offered in an extremely small, thermally
enhanced 5mm x 7mm LGA package and can be
used in high side Active ORing applications on bus
voltages up to 12V. The PI2125 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 PI2125
solutions for high current Active ORing
requirements.
The PI2125, with its 5.5mΩ 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 PI2125 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
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The under-voltage
are programmable via
and over-
an external
resistor divider.
Features
Integrated High Performance 12A, 5.5mΩ
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 ( 12Vbus)
Package Information
17-pin 5mm x 7mm Thermally Enhanced LGA
Package
Typical Application:
Figure 1: PI2125 High Side Active ORing
Picor Corporation • picorpower.com
Figure 2: PI2125 input current de-rating based on maximum
TJ=150°C vs. ambient temperature.
PI2125
Rev 1.0 Page 1 of 20




Vicor Corporation

PI2125 Datasheet Preview

PI2125 Datasheet

12 Amp Full-Function Active ORing Solution

No Preview Available !

Pin Description
Pin
Name
D
Pin
Number
1, 15, 16,
17
S 2, 3, 4, 5
SP 6
FT 7
BK 8
SL 9
VC
GND
OV
10
11
12
UV 13
www.DataSheet4U.com
SN 14
Description
Drain- The Drain of the internal N-channel MOSFET, connect to the output load.
Source-The source of the internal N-channel MOSFET, connect to the input power source
bus voltage.
Positive Sense Input & Clamp: Connect SP pin to the S pin. The polarity of the voltage
difference between SP and SN provides an indication of current flow direction through the
MOSFET.
Fault State Output: This open collector pin pulls low when a fault occurs. Fault logic inputs
are VC Under-Voltage, Input Under-Voltage, Input Over-Voltage, Forward Over-Current,
light load, reverse current, and Over-Temperature. Leave this pin open if unused.
Blanking timer Input-Output: Connect a resistor from BK to GND to set the blanking time
for the Reverse Comparator function. To configure in slave mode, connect BK to VC. To
configure in master mode with the fastest turn-off response connect BK directly to GND.
Slave Input-Output: This pin is used for paralleling multiple PI2125 solutions in high power
applications. When the PI2125 is configured as the Master, this pin functions as an output
capable of driving up to 10 SL pins of slaved PI2125 devices. It serves as an input when
the PI2125 is configured in slave mode.
Input Supply Pin: This pin is the supply pin for the control circuitry and gate driver.
Connect a 1μF capacitor between VC pin and the GND pin. Voltage on this pin is limited to
15.5V by an internal shunt regulator in high auxiliary voltage applications. For high voltage
auxiliary supply applications connect a shunt resistor between VC and the auxiliary supply.
Ground: This pin is ground for the gate driver and control circuitry.
Input Over Voltage Input: The OV pin is used to detect an input source over-voltage
condition in ground referenced applications. When the OV pin voltage crosses the OV
threshold, the FT pin pulls low indicating a fault condition. The input voltage OV threshold
is programmable through an external resistor divider. Connect OV to GND to disable this
function.
Input Under-Voltage Input: The UV pin is used to detect an input source under-voltage
condition in ground referenced applications. When the UV pin voltage drops below the UV
threshold, the FT pin pulls low indicating a fault condition. The input voltage UV threshold is
programmable through an external resistor divider. Connect UV to VC to disable this
function.
Negative Sense Input & Clamp- Connect SN to D pin. The polarity of the voltage
difference between SP and SN provides an indication of current flow direction through the
MOSFET.
Package Pin-out
17 Pin LGA (5mm x 7mm)
Top view
Picor Corporation • picorpower.com
PI2125
Rev 1.0 Page 2 of 20


Part Number PI2125
Description 12 Amp Full-Function Active ORing Solution
Maker Vicor Corporation
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PI2125 Datasheet PDF






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