Vishay Intertechnology Space-Saving 60 A VRPower® Smart Power Stages Increase Accuracy While Simplifying Designs
November 30 2016 - 11:00AM
Meeting the need for real-time processor and memory power
consumption monitoring in high-performance telecom equipment and
datacenter servers, Vishay Intertechnology, Inc. (NYSE:VSH) today
introduced two new 60 A VRPower® smart power stages with integrated
current and temperature monitors for multi-phase DC/DC systems.
Combining power MOSFETs, an advanced driver IC, and a bootstrap FET
in the thermally enhanced low-profile 5 mm by 5 mm by 0.66 mm
PowerPAK® MLP55-32L / QFN package, the Vishay Siliconix SiC645 and
SiC645A simplify designs and deliver higher accuracy than
comparable standard DrMOS products while offering a 16 % smaller
footprint than similar competing devices.
Unlike solutions that monitor power consumption using inductor
DCR sensing — a technique with lower accuracy that requires
external components such as a thermistor for temperature
compensation — the SiC645 and SiC645A utilize low-side MOSFET
RDS(ON) sensing to accurately report current (IMON) and temperature
(TMON) using 5 mV/A and 8 mV/C signals, respectively. This method
of current sensing is accurate over a wide load range and is
internally temperature-compensated, simplifying designs by removing
the need for external circuitry. In addition, it eliminates current
sense traces while delivering fast performance without noise or
external filtering.
The power stages’ improved accuracy meets Intel’s stringent VR13
and VR13.x current monitoring accuracy requirements and allows for
better utilization of a server CPU’s turbo boost capability, a
critical advantage for datacenter customers requiring improved
performance without increasing costs. Light-load efficiency is
supported by a dedicated low-side FET control pin.
The devices offer an input range of 4.5 V to 18 V and are
optimized for high-frequency and high-efficiency VRMs and VRDs to
power microprocessors and memory for servers, networking, and cloud
computing; GPUs in high-performance graphic cards and video game
consoles; as well as general purpose multi-phase point-of-load
(POL) DC/DC converters. The package of the SiC645 and SiC645A can
be cooled on both sides, while low package parasitic resistance and
inductance enable high switching frequencies of up to 2 MHz.
Fault protection features for the RoHS-compliant, halogen-free
devices include high-side FET short and overcurrent protection,
over-temperature protection, and undervoltage lockout (UVLO). The
power stages feature open drain fault reporting output. The SiC645
and SiC645A support 5 V and 3.3 V PWM tri-level input,
respectively, and are compatible with Intersil’s ISL68/69xx and
ISL958xx digital multiphase controllers.
Samples and production quantities of the smart power stages are
available now, with lead times of 10 weeks.
Vishay Intertechnology, Inc., a Fortune 1000
Company listed on the NYSE (VSH), is one of the world's largest
manufacturers of discrete semiconductors (diodes, MOSFETs, and
infrared optoelectronics) and passive electronic components
(resistors, inductors, and capacitors). These components are used
in virtually all types of electronic devices and equipment, in the
industrial, computing, automotive, consumer, telecommunications,
military, aerospace, power supplies, and medical markets. Vishay’s
product innovations, successful acquisition strategy, and "one-stop
shop" service have made it a global industry leader. Vishay can be
found on the Internet at www.vishay.com.
VRPower and PowerPAK are registered trademarks of Siliconix
incorporated.
Vishay on Facebook:
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Twitter feed: http://twitter.com/vishayindust
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A VRPower smart power stages increase accuracy while simplifying
designs - https://goo.gl/t7VN0O
Link to product
datasheet:http://www.vishay.com/ppg?65424 (SiC645)
Link to product
photo:https://www.flickr.com/photos/vishay/albums/72157672693935684
For more information please contact:
Vishay Intertechnology
Peter Henrici, +1 408 567-8400
peter.henrici@vishay.com
or
Redpines
Bob Decker, +1 415 409-0233
bob.decker@redpinesgroup.com
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