SMH4802 Datasheet, PDF (14/20 Pages) Summit Microelectronics, Inc. – Programmable -48V Hot-Swap Controller with Forced Shut Down

SMH4802
Preliminary Information
DEVELOPMENT HARDWARE & SOFTWARE
PROGRAMMING CONNECTION
The SMH4802 uses the industry standard I²C 2-wire
serial data interface. This interface provides access to
the configuration registers and the nonvolatile fault latch.
Device configuration utilizing the Windows based
SMH4802 graphical user interface (GUI) is highly recom-
mended. The software is available from the Summit
website (www.summitmicro.com). Using the GUI in
conjunction with this datasheet simplifies the process of
device prototyping and the interaction of the various
functional blocks. A programming Dongle (SMX3200) is
available from Summit to communicate with the
SMH4802. The Dongle connects directly to the parallel
port of a PC and the target application. It programs the
device through a cable using the I²C bus protocol.
The SMX3200 system consists of a programming Dongle,
cable and Windows GUI software. The device is then
configured on-screen via an intuitive graphical user
interface employing drop-down menus. It can be ordered
on the website or from a local representative. The latest
revisions of all software and an application brief describ-
ing the SMX3200 is available from the website.
When design prototyping is complete, the software can
generate a HEX data file that should then be transmitted
to Summit for approval. Summit will then assign a unique
customer ID to the HEX code and program production
devices before the final electrical test operations. This
will ensure proper device operation in the end application.
The Windows GUI software will generate the data and
send it in I²C serial bus format so that it can be directly
downloaded to the SMH4802 via the programming Dongle
and cable. An example of the connection interface is
shown in Figure 10.
When design prototyping is complete the software can
generate a HEX data file that should be transmitted to
Summit for approval. Summit will then assign a unique
customer ID to the HEX code and program production
devices before the final electrical test operations. This
will ensure proper device operation in the end application.
Caution: If the device is powered from -48V
during programming damage may occur when
connecting the dongle to a system utilizing an
earth-connected positive terminal. Either dis-
abling the -48V connection or using a laptop
computer is the best way to avoid damage.
–48V
Ret.
Top view of straight 0.1" × 0.1" closed
side connector SMX3200 interface
Pin 10, Reserved
Pin 8, Reserved
Pin 6, Reserved
Pin 4, SDA
RD
Pin 2, SCL
Pin 9, 5V
Pin 7, 10V
Pin5, Reserved
Pin3, GND
Pin 1, GND
VDD
SMH4802
SDA
VSS ^SCL
10 9
87
65
43
21
C1
0.01µF
–48V
2062 Fig10
Figure 10. SMX3200 Programmer I²C serial bus connections.
Pin numbers reflect SOIC package.
14
2062 2.3 6/19/03
SUMMIT MICROELECTRONICS, Inc.