5 BQ76942EVM Circuit Module Physical Construction
This section contains the PCB layout, bill of materials, and schematic of the BQ76942EVM circuit module.
The BQ76942EVM consists of one circuit module assembly, BMS028.
5.1 Board Layout
The BQ76942EVM circuit module is a 4.0-inch × 5.0-inch 4-layer circuit card assembly. It is designed for easy
assembly with cell connections on the left edge to a terminal block. Pack terminals are on the top edge using a
terminal block. Wide trace areas are used reducing voltage drops on the high current paths. Optional
connections for hardware feature pins are on a separate terminal block on the top edge of the board. An on-
board interface adapter with USB connector is located in the right lower corner. Configuration headers are
toward the right side of the board. Pushbutton switches for wake up and reset of the BQ76942 are located near
the bottom edge of the board. 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.
See additional information in the configuration and operation sections of this document. Figure 5-1 to Figure 5-8
show the board layout.
Figure 5-1. Top Silk Screen
www.ti.com
BQ76942EVM Circuit Module Physical Construction
SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020
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BQ76942 Evaluation Module 23
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