SLUSF60 December 2023 BQ77307
PRODUCTION DATA
An example circuit layout using the BQ77307 device in a 7s-series cell design is described below. The design implements the schematic shown in the BQ77307 7-Series Cell Schematic Diagram—Monitor and BQ77307 7-Series Cell Schematic Diagram—Additional Circuitry and uses a 2.175-inch × 1.400-inch 2-layer circuit card assembly, with cell connections on the left edge, and pack connections along the bottom edge of the board. Wide trace areas are used, reducing voltage drops on the high current paths.
The board layout, which is shown in BQ77307 Two-Layer Board Layout–Top Layer and BQ77307 Two-Layer Board Layout–Bottom Layer, includes spark gaps with the reference designator prefix E. These spark gaps are fabricated with the board and no component is installed.