IRDC3847-P1V2
Confidential
This evaluation board is a preliminary version meant for the engineering evaluation of the IR3847. Based on the results of the
continuing evaluation, this board can evolve and change without notice
2/13/2012
3
CONNECTIONS and OPERATING INSTRUCTIONS
LAYOUT
The PCB is a 6-layer board. All of layers are 2 Oz. copper. The IR3847 and most of the passive
components are mounted on the top side of the board.
Power supply decoupling capacitors and feedback components are located close to IR3847.
The
feedback resistors are connected to the output of the remote sense amplifier of the IR3847 and are
located close to the IR3847. To improve efficiency, the circuit board is designed to minimize the length
of the on-board power ground current path. Separate power ground and analog ground are used and
may be connected together using a 0 ohm resistor at one of three possible locations. It is preferred to
use one of R43 or R44.
Vin
Vo
Gnd Gnd
Top View