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零件编号 | PI2122 | ||
描述 | 12Amp Active ORing Solution | ||
制造商 | Vicor Corporation | ||
LOGO | |||
1 Page
PI2122
Cool-ORing Series
12Amp Active ORing Solution With Load Disconnect
Description
The Cool-ORing PI2122 is a complete full-function
Active ORing solution with a high-speed ORing
MOSFET controller and a very low on-state
resistance Dual MOSFETs designed for use in
redundant power system architectures. The PI2122
Cool-ORing solution is offered in an extremely small,
thermally enhanced LGA package and can be used
in low voltage (≤ 5Vbus) high side Active ORing
applications. The PI2122 enables extremely low
power loss with fast dynamic response to fault
conditions, critical for high availability systems. The
PI2122 provide true bi-directional switch capabilities
to protect against both power source and load fault
conditions.
A load short circuit detection feature allows user
definition of a short condition enabling minimum duty
cycle into a short. The PI2122 has the added benefit
of being able to protect against output load fault
conditions that may induce excessive forward
current and device over-temperature by turning off
the back-to-back MOSFETs with an auto-retry
programmable off-time. The back-to-back MOSFETs
drain-to-drain voltage is monitored to detect normal
forward, excessive forward, light load and reverse
current flow. The status is reported via an active low
www.DaftaaSuhlteeftl4aUg.coomutput. A temperature sensing function
turns off the MOSFETs and indicates a fault if the
controller junction temperature exceeds 145°C.
Typical Application:
Features
• Integrated High Performance 12A, 6mΩ back-to-
back MOSFET
• Very-small, high density fully-optimized solution
providing simple PCB layout.
• Fast Dynamic Response, with 140ns reverse &
170ns forward over-current turn-off delay time
• Accurate sensing capability to indicate system
fault conditions
• Programmable under & over-voltage functions
• Over temperature shutdown
• Programmable over-current off time
• Programmable short circuit load detection
• Active low fault flag output
Applications
• N+1 Redundant Power Systems
• Servers & High End Computing
• High-side Active ORing
• High current Active ORing ( ≤ 5Vbus)
• MicroTCA
Package
• 5mm x 7mm 17-pin Thermally Enhanced LGA
Package
Figure 1: PI2122 High Side Active ORing
Picor Corporation • picorpower.com
Figure 1: PI2122 input current de-rating based on
PI2122
Rev1.0
Page 1 of 19
Figure 5: PI2122 Functional Block Diagram
www.DataSheet4U.com
Figure 6: Typical comparators thresholds and hysteresis values.
Picor Corporation • picorpower.com
PI2122
Rev1.0
Page 8 of 19
Rds(on) = 9mΩ∗1.29 =11.61mΩ maximum at 111°C
Maximum power dissipation is:
Pdmax = Iin2 ∗ Rds(on) = (8A)2 ∗11.61mΩ = 743mW
Recalculate TJ:w
TJ
max
=
70°C
+
⎜⎛
⎝
56°C
W
∗
(8A)2
∗11.61mΩ⎟⎞
⎠
=
111.6°C
Reverse Current Threshold:
The following procedure demonstrates how to
calculate the minimum required reverse current in
the internal MOSFETs to generate a reverse fault
condition and turn off the internal Misfits at room
temperature (25°C) and typical Rds(on):
Is.reverse
=
Vth.reverse
Rds(on)
=
− 6mV
6mΩ
= −1.0A
Forward Over-Current threshold\:
The following procedure demonstrates how to
calculate typical forward current in the internal
MOSFETs to generate a forward over-current fault
condition and turn off the internal MOSFETs at room
temperature (25°C) and typical Rds(on):
I FOC
=
VFOC −TH
Rds(on)
=
90mV
6mΩ
= 15A
www.DataSheet4U.com
Figure 24: Plot of PI2122 response time to reverse current detection (Example 1, Figure 22)
Picor Corporation • picorpower.com
PI2122
Rev1.0
Page 16 of 19
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页数 | 19 页 | ||
下载 | [ PI2122.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
PI2121 | 24 Amp Full-Function Active ORing Solution | Vicor Corporation |
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PI2125 | 12 Amp Full-Function Active ORing Solution | Vicor Corporation |
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