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Circuit Module Physical Construction
J13, C38, R80, R81, R83, R88, R93, R98, R99, R100 and R113 provide patterns to bring signals to a
convenient location for evaluation of optional external high side switching
7 Circuit Module Physical Construction
This section contains the PCB layout, bill of materials and schematic of the bq76930EVM and
bq76940EVM circuit modules.
The circuit board is common to the 2 different assemblies.
7.1 Board Layout
The bq76930EVM and bq76940EVM circuit modules are assembled on a common 4.0-in × 6.0-in, 4-layer
circuit board. It is designed for easy connection with cell connections on the left side to a terminal block
and high-current screw terminals. Control connections are on the left top. Pack terminals are on the right
side using screw terminals. Wide trace areas are used to reduce voltage drops on the high current paths.
The EVM layout and construction allows easy understanding of the connections and access to the test
points for evaluation, but the connector area and programming features result in a large board.
See additional information in the configuration and operation sections of this document. Figure 18 to
Figure 23 show the board layout.
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SLVU925B–April 2014–Revised July 2014 bq76930 and bq76940 Evaluation Module User's Guide
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