Bq40370 -
The bq40370 is a highly specialized battery management chip from Texas Instruments commonly found in Dell laptop batteries (such as models WDX0R, F3YGT, and YRDD6). It is notable for its hybrid "ACEDV" (Advanced Compensated End-of-Discharge Voltage) gauging technology, which bridges the gap between basic voltage-based monitoring and advanced Impedance Tracking. Key Technical Insights
The BQ40370 is a highly integrated, single-cell lithium-ion battery management IC (BMC) designed for portable and wearable applications. This report provides an overview of the BQ40370's features, specifications, and applications. bq40370
Are you looking to reset a specific battery pack, or do you need help identifying a blown fuse on the board? The bq40370 is a highly specialized battery management
2. Sealed Mode
The bq40370 enters "Sealed Mode" to prevent tampering. In this state, you can read voltage and current, but you cannot write registers or reset the gauge. To unseal it, you need the 32-bit key (specific to the OEM). For TI evaluation modules, the key is 0x04147272, but commercial packs change this via the Data Flash. Without the key, you cannot reset Cycle Count or Capacity. Oscillatory behavior near OV/UV: Are you looking to
- Low cost, simple CEDV gauge is acceptable
- No need for field firmware updates
- 2–4S Li-Ion pack with standard protections
By staying up-to-date with the latest developments in battery management technology, designers and engineers can create more efficient, safe, and reliable battery-powered systems that meet the needs of a wide range of applications.
The bq40370 is a specialized gas gauge and protection Integrated Circuit (IC) manufactured by Texas Instruments (TI). Unlike standard consumer-grade fuel gauges, the bq40370 is designed for impedance tracking and is frequently found in high-end battery packs, medical devices, and industrial tools where accuracy under load is non-negotiable.