Manages the voltage levels of 2-series to 4-series cell packs to ensure all cells discharge and charge equally, enhancing battery lifespan. Advanced Protection Features: Overcurrent in Discharge (OCD) Short-Circuit Protection Overvoltage (OV) / Undervoltage (UV) Temperature Monitoring: Supports external NTC thermistors.

Is it a:

The BQ40370 is a highly integrated system-on-chip (SoC) that combines several critical functions:

Despite its closed nature, a thriving community of battery repair technicians and hobbyists has emerged around the BQ40370. Forums like are hubs for sharing knowledge and troubleshooting these chips.

A: It is technically possible to purchase the IC, but without official datasheets, development tools, or support from TI, it would be exceptionally challenging to integrate it into a new design. It is not recommended for hobbyist or new commercial projects.

Technically, the BQ40370 is suitable for a much broader range of battery-powered devices. Its feature set could theoretically be applied to power tools, portable medical equipment, electric vehicles (EVs), and energy storage systems, though there is little public evidence of it being used outside of the laptop market.

: It manages safety features like over-discharge protection and controls the thermal fuse (often part number D6SA3-12), which can blow if a failure is detected.

For new product development in 2024-2025, do not use the bq40370 . TI lists it as "NRND." Use the BQ40Z50-R2 or BQ40Z80. However, if you are maintaining legacy medical or industrial equipment, you must stick with the bq40370 for drop-in compatibility.

A: While the chip can be found for sale through specialized component vendors, Texas Instruments does not publicly distribute documentation or support for this device as it is primarily manufactured for specific OEMs (like Dell).