Linear Technology LTC4245CUHF Quick Start Manual

DESCRIPTION
Demonstration circuit 985 showcases
®
the LTC 4245 Hot
2
with I C™ compatible monitoring in a
CompactPCI™ (CPCI) application. The
LTC4245 resides on the plug-in board,
DC985A-A, which carries a female CPCI
connector. This board plugs into the
male connector
board, DC985A-B. The plug-in board
also carries the four n-FET switches
and sense resistors required for hot
swap. LEDs provide visual indication
of the important signals and volt-
ages.
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V Input Supply Range
IN
+12V IN
+5V IN
+3.3V IN
-12V IN
I Circuit Breaker Trip Current
OUT,CB
+12V OUT
+5V OUT
+3.3V OUT
-12V OUT
QUICK START PROCEDURE
1. Verify that the jumpers are set as
follows:
Backplane board: JP1 BD_SEL#: LOW;
JP2 PCI_RST#: HIGH
Multiple Supply Hot Swap Controller
with I
Swap™ controller
on the backplane
CONDITIONS
MOSFET Q1-Q4 On, TVS Z1-Z4 Off
CFG Jumper, JP4, at LOW or FLOAT
CFG Jumper, JP4, at HIGH
CFG Jumper, JP4, at LOW
CFG Jumper, JP4, at FLOAT or HIGH
After Start-Up
R1 = 8mΩ, 1%
R2 = 3.5mΩ, 1%
R3 = 2.5mΩ, 1%
R4 = 40mΩ, 1%
DEMO CIRCUIT 985
QUICK START GUIDE
2
C Compatible Monitoring
The board can be configured to work
in a PCI Express™ application by ad-
justing a few jumpers. To access the
powerful monitoring features of the
LTC4245, the I
plane board must be connected to a
DC590 board (available separately).
The LTC4245 can then be controlled
with evaluation software running on a
host PC.
Design files for this circuit board
are available. Call the LTC factory.
and LTC are registered trademarks of Linear Technology
Corporation. Hot Swap and QuickEval are trademarks of Linear
Technology Corporation. All other trademarks are the property
of their respective owners.
Plug-in board: JP3 ON CONFIG: AUTO;
JP5 PGI: HIGH; JP4 CFG: LOW if us-
ing all four supplies, FLOAT if us-
ing 12V, 5V and 3.3V, HIGH if using
12V, and two 3.3V.
LTC4245CUHF
LTC4245CUHF
2
C port on the back-
MIN TYP MAX
10.8 12 15
4.5 5 6
2.9 3.3 6
2.9 3.3 6
-10.8 -12 -15
0 -15
5.5 6.25 6.9
6.4 7.1 7.9
8.9 10 11.1
0.99 1.25 1.52
UNITS
V
V
V
V
V
V
A
A
A
A
1