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PI2126 Datasheet Preview

PI2126 Datasheet

12 Amp Full-Function Active ORing Solution

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PI2126
Series
30 Volt, 12 Amp Full-Function Active ORing Solution
Description
The PI2126 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 12V Bus redundant power system
architectures. The PI2126 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. The PI2126 enables extremely low power
loss with fast dynamic response to fault conditions,
critical for high availability systems.
The PI2126, with its 4.5mΩ internal MOSFET provides
very high efficiency and low power loss during steady
state operation. The PI2126 monitors the current
direction in the MOSFET and will respond very fast to a
reverse current due to input power source fault
condition to prevent undesired high current build-up in
the system. The PI2126 provides an active low fault flag
output to the system during reverse current, excessive
forward over-current and UVLO fault conditions.
Features
Integrated High Performance 12A, 4.5mΩ MOSFET
Very small, high density fully-optimized solution with
simple PCB layout
Fast dynamic response to power source failures,
with 90ns reverse current turn-off delay time
Accurate sensing capability to indicate system fault
conditions (-6mV reverse threshold)
Internal charge pump
Fault Status output
Applications
N+1 Redundant Power Systems
Servers & High End Computing
Telecom Systems
High-side Active ORing
Package Information
The PI2126 is offered in the following package:
25-pin 5mm x 7mm thermally enhanced LGA
package, achieving <11°C/W RθJ-PCB
Typical Application:
Vin1
S
D
SP PI2126
VR
VC
SN
FT FT
Vin2
S
D
SP PI2126
VR
VC
SN
FT FT
Figure 1: PI2126 High Side Active ORing
Picor Corporation • picorpower.com
Applied Input Short
Normal operation
0A
Input
Current
Reverse Current
Reverse detection
V(D) Redundant Bus
V(S) (Input)
MOSFET Turn Off Time
90ns
0V
Figure 2: PI2126 response time to an input short fault
condition
PI2126
Rev 1.1
Page 1 of 15




Picor

PI2126 Datasheet Preview

PI2126 Datasheet

12 Amp Full-Function Active ORing Solution

No Preview Available !

EOL
Pin Description
Pin
Name
D
Pin Number
1, 15, 16 17,
22, 23, 24, 25
S
2, 3, 4, 5, 18,
19, 20, 21
SP 6
VR 7
VC 8
NC 9, 12
PG 10, 11
13
SN 14
Description
Drain: The Drain of the internal N-channel MOSFET. Connect this pin to the output load.
Source: The source of the internal N-channel MOSFET. Connect this pin to the input power
source bus voltage.
Positive Sense Input & Clamp: Connect SP pin to the trace between S pin and the input source
(outside of the PI2126 foot print). The polarity of the voltage difference between SP and SN
provides an indication of current direction through the MOSFET.
Controller Input Supply With Limiting Resistor: This pin is connected internally to VC through
a 420Ω resistor added for Bus voltages greater than 10V and less than 14V.
Controller Input Supply: This pin is the supply pin for the control circuitry and gate driver.
Voltage on this pin is regulated to 11.7V with respect to PG pin by an internal shunt regulator.
Not Connected: Leave these pins unconnected.
Control Circuitry Return: These pins are ground return for the gate driver and control circuitry.
In 12V applications connect these pins to ground.
Fault Status Output: This open collector pin pulls low after a delay when a reverse fault or a
forward fault occurs. When the input voltage to the control circuitry is in under voltage, VVC-PG <
7V this pin pulls low. When VVC-PG > 7.15V and 6mV < SP-SN < 275mV this pin clears (High).
Leave this pin unconnected if unused.
Negative Sense Input: Connect SN pin to the trace between D pin and the output load (outside
of the PI2126 foot print). The polarity of the voltage difference between SP and SN provides an
indication of current direction through the MOSFET.
Package Pin-Out
S
2
S 3 18 S
19 S
S 4 20 S
21 S
S5
D
1
D 22
D 23
D 24
D 25
17 D
16 D
15 D
SP 6 PI2126
14 SN
VR 7
13 FT
8 9 10 11 12
VC NC PG PG NC
25-pin LGA (5mm x 7mm)
Top view
Picor Corporation • picorpower.com
PI2126
Rev 1.1
Page 2 of 15


Part Number PI2126
Description 12 Amp Full-Function Active ORing Solution
Maker Picor
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PI2126 Datasheet PDF






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