: The physical chip is packaged in a compact, thermal-efficient 32-pin Quad Flat No-leads (VQFN) package (commonly designated as BQ40370RSMR ). This package design features an exposed bottom pad that acts as a primary ground connection ( VSScap V sub cap S cap S end-sub
The chip often requires intervention when a battery fails or is being refurbished:
The most probable explanation is a transcription error of a Texas Instruments bq40xxx battery management IC. Without additional context (e.g., device markings, PCB label, or originating system), a definitive match is impossible. bq40370
Failure to perform this learning cycle results in inaccurate battery percentage reporting (e.g., the device shutting down while reporting 20% battery remaining).
After replacing the cells, the chip requires a full charge/discharge cycle to calibrate the gas gauge. The discharge current should be controlled; for example, a 1400mA discharge rate might be too high for proper recalibration on some Dell packs. : The physical chip is packaged in a
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.
By blending these two models, the bq40370 delivers highly accurate Remaining State of Charge (RSOC) tracking without demanding long, uninterrupted cell relaxation periods during a system reboot. Key Technical Characteristics [Solved] Dell WDX0R BQ40370 Failure to perform this learning cycle results in
As seen in BQ40370 FW V3.14 discussions , different firmware versions may behave differently during calibration.
The BQ40370 is a highly integrated battery management IC (BMC) designed by Texas Instruments (TI) to manage and monitor lithium-ion (Li-ion) and lithium-polymer (Li-poly) batteries in a wide range of applications. This advanced IC provides a comprehensive solution for battery management, including monitoring, protection, and balancing, to ensure safe and efficient operation of battery-powered systems.
The BQ40370 acts as a "gas gauge" and protection unit for multi-series lithium-ion battery packs, typically ranging from . It monitors critical battery parameters, including:
Provide a guide on how to safely open a laptop battery pack.