Bq40370 May 2026

is a specialized Integrated Circuit (IC) primarily used as a Battery Gas/Fuel Gauge

ACEDV is a hybrid method that combines traditional CEDV (Compensated End-of-Discharge Voltage) with elements of TI’s "Impedance Track" technology. This allows the chip to provide high-accuracy state-of-charge (SoC) data without requiring the long "relaxation periods" (rest times) typically needed by pure Impedance Tracking gauges. Chemistry Support: bq40370

3.2. SMBus Interface

The device acts as an SMBus Slave device. It allows a host processor (the main system CPU) to query battery status easily. Key registers (Standard SBS commands) include: is a specialized Integrated Circuit (IC) primarily used

12. Final Notes

• The bq40370 is not recommended for new designs (NRND) by TI for some variants – check latest PCN.
• For new designs requiring high-accuracy gauge, consider bq40z50 (Impedance Track) or bq28z610 (1–2S).
• Always perform a full discharge learning cycle after configuration to calibrate FCC.

• Low RDS(on) at the gate drive voltage supplied by bq40370.
• Consider thermal resistance and package; choose appropriate SOA for short-circuit events.
• Use matched, low thermal drift MOSFETs; consider RDS(on) balance between charge and discharge FETs.

Capacity Jumps: A common symptom of a failing BQ40370-based battery is a sudden drop in charge percentage (e.g., jumping from 30% to 5%). This usually indicates an "OverEstimated FCC" or a mismatch in the programmed CEDV coefficients for the specific cells used. The bq40370 is not recommended for new designs