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San
Jose, CA -- April 3, 2003 -- Summit
Microelectronics has announced availability of the
SMH4802
fully integrated, programmable hot swap controller
for -48V power supplies.
Hot swap capability is a critical element in a
high-availability system, to allow add-in cards to
be removed from or inserted into a fully powered
host platform without an interruption in the
system's operation and without damage to any of the
devices on the board. This provides a mechanism for
the replacement of faulty boards, addition of new
boards or the reconfiguring of a system without
down-time, and is built into the SMH4802. The
SMH4802 has the ability to perform remote
power-on/off, latch-off and power-on delays over
the industry standard I²C bus for use in -48V
distributed power systems and emerging applications
using this bus standard.
The SMH4802 also provides both soft-start power-up
and "circuit-breaker" functions to protect against
over-current conditions. During power-up,
under-voltage and over-voltage monitors in the
controller first verify that the input voltage is
within the user-specified range; once these
requirements are met, the hot-swap controller will
then turn on an external power MOSFET to ramp up
the supply voltage in a controlled, well-behaved
manner. Sustained over-current events can damage
the host supply and/or the load circuitry, causing
a system to fail. To prevent this, the device
features a programmable forced-shutdown
"circuit-breaker" that can be set to either latch
off, or reactivate after a two-second cooling-down
period.
Typical applications are those with -48V power
distribution, including high-availability servers,
such as those used in Internet access; central
office switches; and telecommunications line cards
that demand both on-the-fly configurability and
redundant power supply to the system.
Design Kit for Automated Prototype
Development
To speed design and product development using
the SMH4802, Summit offers the SMX3200
programming system. As with all Summit design kits,
the SMX3200 is a complete development tool that
lets designers easily manipulate the
characteristics of their power management system.
The SMX3200 design kit includes menu-driven
Microsoft Windows® graphic user interface (GUI)
software to automate programming tasks and also
includes all necessary cabling hardware to
interface from the parallel port of a laptop or
desktop PC for in-circuit programming in the user's
prototype.
Upon completion of prototyping, the source file is
converted to an object file for transmittal to
Summit for review and approval. Summit then assigns
a unique customer identification code to the file
and will program the customer's production devices
prior to final electrical test. This ensures that
the device will operate properly in the end
application. The design kit software can be
downloaded now from Summit's website
www.summitmicro.com
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Pricing, Availability and Target
Applications
The SMH4802 is available now in both the
commercial and industrial temperature ranges in a
14-pin surface-mounted SOIC package.
Commercial-range pricing is $2.50 in quantities of
10,000 units.
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About
Summit
Summit Microelectronics supplies semiconductors
that manage the power functions in communications,
networking, storage and server systems. Using
Summit's programmable analog technology, customers
can achieve carrier-class availability, the highest
standard of reliability available today for
telecommunications, data communications and
Internet applications.
Founded in 1997, Summit is headquartered in San
Jose, California. The Company is ISO 9001
certified. Summit's website is www.summitmicro.com.
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