bq76920EVM Circuit Module Physical Construction
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SLVU924D – March 2014 – Revised November 2018
Copyright © 2014–2018, Texas Instruments Incorporated
bq76920 Evaluation Module User's Guide
7
bq76920EVM Circuit Module Physical Construction
This section contains the PCB layout, bill of materials, and schematic of the bq76920EVM circuit module.
The bq76920EVM consists of one circuit module assembly, PWR523.
7.1
Board Layout
The bq76920EVM circuit module is a 4.0-inch × 4.805-inch 4-layer circuit card assembly. It is designed for
easy assembly with cell connections on the left side to a terminal block and high current terminals through
banana jacks. Control connections are on the left top. Pack terminals are on the right side using banana
jacks. Wide trace areas are used reducing 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.
The board layout includes spark gaps with the reference designator prefix "E". These spark gaps are
fabricated with the board and no component is installed. The design includes spark gap E1 across the
power FETs. Contamination on the board or shorting of the pattern could bypass the power FETs and E1
is not recommended.
See additional information in the configuration and operation sections of this document.
to
show the board layout.