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Campbell,
CA -- July 7, 1999 --
Summit
Microelectronics has expanded its programmable
hot-swap controller IC family with the addition of
a circuit for distributed power systems employed by
high-availability communications
products.
The
device, the SMH4803,
provides the industry's most complete feature set
for distributed power hot-swap controllers,
providing easy sequencing of on-card DC/DC
converters.
(See
hot-swap description below).
The
SMH4803
is designed for systems where one or more supply
voltages are required on the hot-swap board.
Instead of supplying multiple voltages from the
system backplane, a single high voltage is routed
to each card and converted to the voltages
required. Distributing a single voltage simplifies
the host's power supply and provides a flexible
system architecture. The SMH4803
is designed for distributed power systems operating
from 20 volts to greater than 500 volts.
The
SMH4803
provides; card insertion detection, over-voltage
and under-voltage monitoring of the host's power
supply, it monitors the state of an external MOSFET
switch, connects power to the load(s) when enabled
by the host, and switches the load(s) ON when the
input voltage is within customer defined limits. A
programmable circuit-breaker function protects both
the board and host supply against over-current
conditions. The circuit breaker can also be
programmed for either automatic or manual
reset.
Three
separate "power good" logic outputs provide
sequencing for multiple DC/DC converter loads. The
time delay between activation of each load is
programmable from 5ms to 160ms. Correct supply
sequencing is essential in many DSP based designs
to prevent system lock-up.
The
SMH4803
is available in the 20-pin SOIC priced at $3.75
(1kpc). A 20-pin TSSOP version will be available Q1
2000.
Previously,
the Company introduced the S39421; a
general-purpose hot-swap controller, and the
programmable SMH4042
designed for CompactPCI hot-swap systems.
Additionally, the SMH4042
provides 4K of EEPROM for board serialization or
configuration.
Summit
Microelectronics designs, develops and manufactures
programmable analog integrated circuits for the
manufacturers of telecommunications and data
communications switching equipment. The Company
uses an EEPROM process that allows customer
programmability for trim and calibration functions.
Many of the circuits in the Company's portfolio
offer extra EEPROM cells that can be used for any
system memory function.
Hot-Swap
Description
Hot
swap capability is required in all
high-availability or always-on-line systems. This
methodology allows cards or modules to be added to
or taken from a fully powered host platform without
an interruption in the system's operation or damage
to any of the devices on the specific board. Thus,
hot swapping provides the mechanism for the
replacement of faulty boards, the addition of new
boards or the reconfiguring of a system without
downtime.
Press
Contacts:
Rick Orlando, President & CEO: (408)
378-6461,
Rich
Palm, Vice President of Marketing: (408) 378-6461,
###
Summit
Microelectronics, Inc.
1717 Fox Drive
San Jose, CA 95131-2312
Tel: +1.408-436-9890
Email:
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