BQ76942PFBR

• Multicell Battery Monitor and Protector for Up to 10 Cells in Series
• 4.7V to 55V Supply Range
• 286µA Nominal Supply Current
• 48-Pin TQFP package, 7mm X 7mm, 1mm Thickness
• -40°C to 85°C Operating range, 150°C Maximum Junction Temperature
• RoHS compliant, Currently in Production

The BQ76942PFBR is a multicell battery monitor and protector from Texas Instruments supporting 3-series to 10-series cell stacks. It operates from a 4.7V to 55V supply, drawing a nominal 286µA, and is supplied in a 48-pin TQFP package measuring 7mm square. The BQ76942PFBR is rated for -40°C to 85°C ambient operation with a 150°C maximum junction temperature and is RoHS compliant.

A battery monitor and protector measures the voltage of each cell in a series stack along with pack current and temperature, and enforces protection limits against overvoltage, undervoltage, overcurrent and thermal faults. This is mandatory safety and gauging circuitry in any lithium-ion pack, since a series stack cannot be managed by monitoring the pack terminals alone and cells must be balanced to avoid premature capacity loss. A 3-series to 10-series device covers packs in roughly the 12V to 42V nominal range, which spans power tools, e-bikes and light electric vehicles, robotic and warehouse equipment, portable medical devices, and battery energy storage modules. Buyers are battery pack designers and OEMs building their own battery management electronics.