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DEMO MANUAL DC116
HOT SWAP CONTROLLER
LTC1421 Hot Swap Controller
Controls Three Supplies
Demonstration circuit DC116 is a protected, triple-output
Hot Swap
TM
controller. This circuit is designed to allow a
PC board to be safely inserted into and removed from a live
backplane without disturbing the system power or damag-
ing the connector pins due to high inrush currents. A
programmable electronic circuit breaker protects against
shorts.
Also included on the demo board are LEDs that indicate
whether the circuit breaker has tripped, a power failure has
occurred or the switches are turned off. A push-button
switch is provided for users to generate a system reset and
cycle the outputs. Dip switches allow the trip levels of the
output voltage monitoring circuitry to be changed.
The complete demo includes two separate boards,
DC116A and DC116B. The DC116B is used to simulate the
system backplane with three supply inputs. All the inputs
are bypassed with large capacitors. The DC116A is the
daughter board to be inserted into and removed from the
system power bus. The LTC
®
1421 and all other compo-
nents are placed on this board. A staggered-pin connector
is used to ensure proper connection sequencing.
The applications for DC116 include any system with a data
bus and multiple power supplies that needs to be inserted
into or removed from a live system backplane.
DESCRIPTIO
U
DC116B
System Backplane
DC116A
Hot Swap Controller
BOARD PHOTOS
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
DC116A PHOTO
DC116B PHOTO
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