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new products
Analog Devices’ +48V Hot Swap Controller
with Digital Power Monitoring Provides Superior
Plug-in Board Protection and Minimizes Downtime
ADI announced the availability of the ADM1272, an
innovative +48V hot swap controller and PMBus™
power monitor. Designed for high-voltage system
control up to 80V, the ADM1272 provides reliable plug-
in board protection in mission critical systems, such
as servers and communication equipment. Advanced
system control and board power monitoring provide
superior protection against system faults and system
resets from transients up to 120V, which minimizes
system downtime and maximizes availability of the
system across all conditions. Overall system reliability
and MOSFET protection are dramatically increased with
the ADM1272’s adaptable Safe Operating Area (SOA)
protection feature. SOA protection also enables the
use of MOSFETs with a smaller form factor and lower
cost than traditional hot swap controller solutions. Other
performance optimizing features include a PMBus
digital interface that provides the system with real time
telemetry and fault status information.
In a datacenter, like many communications
infrastructures, high availability and reliability is a
critical part of the system design. Pluggable modules/
PCBs, such as servers and storage, require a protection
and control circuit at the power entry point, commonly
referred to as a hot swap control circuit. The ADM1272
hot swap controller accommodates supply voltages from
16V to 80V and allows a circuit board to be removed
from or inserted safely into a live backplane, eliminating
the need to power it down. The ADM1272 also provides
system protection from faults such as over current
events, voltage transients and short circuits. Other
features include current, voltage, power and energy
readback using an integrated 12-bit analog-to-digital
converter (ADC) accessed using a PMBus interface.
This hot swap controller is able to stand off up to 120V
making it very reliable by surviving surges and transients
and avoiding resets, commonly associated with high
voltage systems. Packaging is True High Voltage (80V)
IPC-9592 compliant.
Fusible resistors from TT Electronics save
PCB space
Radial taped power resistors ideal for minimal footprint
designs
TT Electronics, a global provider of engineered
electronics for performance critical applications, today
launched its ULWP2R range of fusible wirewound
resistors. By combining the functions of a fuse and
a line input resistor in a single, vertical radial formed
component the resistors save valuable PCB space.
The UL recognised, 2W rated power resistors are aimed
at designers of high-density PSU circuits where PCB
space is at a premium, fusing must be provided, and
where automatic insertion is a requirement. For use in
both the industrial and consumer sectors, the resistors
can be deployed in power supplies, white goods
controllers, circuit breakers, line input circuits, protection
circuits and other applications.
Factors driving the demand for this type of component
are cost reduction re-designs that are increasing both
the popularity of dual function components and the
automated insertion of parts that cannot be switched
to SMD. Further, the increasing electronic content in
electrical products is putting pressure on the space
available for PSU sections.
With UL1412 recognition, TT Electronics’ ULWP2R
range of fusible wirewound resistors makes it easier
for customers to get UL approval and provides third
party assurance of a safety critical part. The resistor’s
radial, vertical format saves PCB space and also stops
surrounding components and the PCB overheating,
reducing field failure costs.
The inrush and surge withstanding resistors provide
failsafe mains fusing at 120/240Vrms and they feature a
UL94-V0 flameproof coating. Supplied in tape and reel
packaging they are ideal for minimal footprint designs
New-Tech Magazine Europe l 69