|
|
SAN
JOSE, CA -- SEPTEMBER 10, 2004 --
Summit Microelectronics has
introduced the SMH4046
and SMH4047 Intelligent Power
Management
Controllers
for comprehensively managing
power to add-in cards for network
communications, storage, server
and other host system
applications.
Users can choose either the
industry-standard I2C bus or the
MicroWire bus standard for
control of an add-in card by the
host system, and for reporting
status from the add-in card to
the host system. The devices are
programmable with on-chip
non-volatile EEPROM memory. The
devices integrate the capability
to control three positive-voltage
feed source supplies and three
downstream on-card DC-DC
converters. (See Figure 1). They
combine highly programmable
hot-swap protection, cascaded
sequencing, precision voltage
margining, precision ongoing
power-supply voltage control and
precision monitoring/reset into a
highly functional single-chip
device. Engineers can program the
sequence of all six power
supplies to cascade in any order
during power-up and the same or
reverse order during power-down.
They can program the delay time
from the prior channel in the
sequence becoming valid to start
of the next channel’s
transition. This ensures that a
given power supply is not turned
on until the previous supply in
the sequence has reached its
desired level.
Users can choose either the
industry-standard I2C bus or the
MicroWire bus standard for
control of an add-in card by the
host system, and for reporting
status from the add-in card to
the host system. The devices are
programmable with on-chip
non-volatile EEPROM memory. The
devices integrate the capability
to control three positive-voltage
feed source supplies and three
downstream on-card DC-DC
converters. (See
Figure
1).
They combine highly programmable
hot-swap protection, cascaded
sequencing, precision voltage
margining, precision ongoing
power-supply voltage control and
precision monitoring/reset into a
highly functional single-chip
device.
Engineers can program the
sequence of all six power
supplies to cascade in any order
during power-up and the same or
reverse order during power-down.
They can program the delay time
from the prior channel in the
sequence becoming valid to start
of the next channel’s
transition. This ensures that a
given power supply is not turned
on until the previous supply in
the sequence has reached its
desired level.
Summit’s proprietary ADOCtm
(active DC output control) of the
three downstream DC/DC converters
maintains their accuracy to
within +/-0.5% of the
user-programmable setpoint using
a voltage reference that is
internal to the chip. ADOC is
used both during voltage
margining and in ongoing
operation to achieve this very
high level of precision. ADOC is
the technology breakthrough used
in the Summit SMM665 &endash; the
2003 “Analog Zone”
Product of the Year award
winner.
The SMH4046 and SMH4047 perform
the above tasks once they sense
proper add-in card insertion and
sense the presence of the three
upstream source voltages
(typically +12V, +5V and +3.3V)
in specification at the host
platform interface. After they
switch power on, they continue to
monitor this upstream power from
the host platform, and also
monitor downstream power being
fed to the add-in card being
controlled. When programmed to do
so, they immediately assert the
RESET outputs and power-down the
add-in card if any of these power
supplies go outside user-defined
under- or over-voltage
limits.
Other features include an on-chip
EEPROM memory for storing
identification numbers or other
pertinent information. A
temperature sensor circuit is
provided. Universal FPGA pins are
provided for loading pre-written
application-specific program code
to an FPGA over the I2C or
MicroWire bus.
Complete details of the SMH4046
family are available at
www.summitmicro.com,
including datasheets. The SMH4046
has an I2C interface and the
SMH4047 has a MicroWire
interface.
DESIGN SOFTWARE AND PROGRAMMER
FOR PROTOTYPE DEVELOPMENT
To speed user product
development, the SMX3200 design
kit can be used for the SMH4046
and the SMX3199 design kit is
available for the SMH4047. The
design kits are complete
development tools that let
designers easily manipulate the
characteristics of their system.
The they include menu-driven
Microsoft WindowsÒ
graphical user interface (GUI)
software to automate programming
tasks and also includes all
necessary hardware to interface
to the parallel port of a laptop
or PC.
To speed user product
development, the SMX3200 design
kit can be used for the SMH4046
and the SMX3199 design kit is
available for the SMH4047. The
design kits are complete
development tools that let
designers easily manipulate the
characteristics of their system.
The they include menu-driven
Microsoft WindowsÒ
graphical user interface (GUI)
software to automate programming
tasks and also includes all
necessary hardware to interface
to the parallel port of a laptop
or PC.
Once a user completes design and
prototyping, the SMX3200 and
SMX3199 automatically generate a
HEX data file that can be
transmitted to Summit for review
and approval. Summit then assigns
a unique customer identification
code to the HEX file and programs
the customer’s production
devices prior to final electrical
test operations. This ensures
that the device will operate
properly in the end application.
The design kit software can be
downloaded today from
Summit’s website
(www.summitmicro.com).
DESIGN KIT FOR AUTOMATED
PROTOTYPE DEVELOPMENT
An evaluation card is available
containing the SMH4046 or SMH4047
controller, all required
associated circuitry, and a port
for "plug and play" programming
via the SMX3200
or SMX3199 dongle interface.
PRICING AND
AVAILABILITY
Available in volume quantities
today, the SMH4048 and SMH4047
come in a 48-lead TQFP package.
Each device is priced at $5.50 in
10,000 unit quantity for
commercial (0 to 70C) temperature
range operation, and $8.10 for
industrial temperature range (-40
to 85C).
|
|
|
About
Summit Microelectronics,
Inc.
Summit Microelectronics supplies
semiconductors that manage power
functions in
networking/communications,
storage/computing, industrial,
military and consumer products.
Customers can very rapidly tailor
Summit's programmable analog
technology to multiple
applications by programming the
same part.
Founded
in 1997, Summit is headquartered
in San Jose, California. The
Company is ISO 9001
certified.
|
