Bq40370 -

⚠️ Warning: Incorrect CEDV parameters will cause SOC jump errors. Always validate with a full discharge test.

If you have a working bq40370 and want to copy its configuration to a replacement IC, you must read the Data Flash. The most critical offsets are: bq40370

Using bqStudio, execute a "Read All" and save a .gg (Golden Gauging) file. Without this file, a blank bq40370 cannot correctly measure a cell's State of Charge (SOC). Configure CEDV parameters :

If you are troubleshooting a device, finding a bq40370 suggests you are working on high-quality hardware. Common locations include: Set cell balancing (internal balancing current ~5–10 mA)

| Hypothesis | Likelihood | Reasoning | |------------|------------|------------| | Typographical error | High | Common mistypes: bq4050, bq40z70 (exists as bq40z70-R2? No), bq40350, bq40570. | | Obsolete / pre-release part | Low | No archival evidence in TI’s retired product lists. | | Custom or OEM part number | Medium | Some manufacturers use non-public codes for customer-specific ICs. | | Non-TI product | Low | Prefix “bq” is almost exclusively TI battery management. | | Internal company code | Medium | Could be an internal tracking number (BOM, assembly, or test code). |