Battery protection IC for 2S to 4S Li-Ion packs
The Texas Instruments BQ296106DSGT is a battery protection IC designed for Lithium Ion packs with 2 to 4 series cells. Its primary function is monitoring the cell stack for over-voltage conditions and triggering a fault response when any cell exceeds the programmed threshold.
Package and board-fit for space-constrained designs
Housed in an 8-WFDFN with an exposed pad (supplier device package 8-WSON, 2x2 mm), the IC requires a surface-mount footprint with a thermal pad connection to the PCB ground plane. The exposed pad serves as the primary heat path; a proper solder stencil aperture and via pattern under the pad keep the junction temperature within the -40°C to 110°C operating range during a sustained over-voltage fault. The 2x2 mm package footprint is compact enough for placement on the battery management PCB alongside the cell-balancing resistors and sense traces, though the narrow pitch of the WFDFN calls for a controlled solder profile and X-ray inspection to confirm wetting under the exposed pad.