Description:
The Texas Instruments (TI) BQ76942 is a highly integrated, high-accuracy battery monitor and protector for 3-series to 10-series cell lithium-ion, lithium-polymer, and lithium-iron-phosphate battery packs. The device includes a high-accuracy monitoring system and a highly configurable protection subsystem, and supports autonomous or host-controlled cell balancing. It integrates a high-side charge pump NFET driver, dual programmable LDOs for external system use, and a host communication peripheral that supports 400kHz I2C, SPI, and HDQ single-wire standards. The BQ76942 is available in a 48-pin TQFP package.

Features:
• Battery monitoring function for 3-series to 10-series cells
• Integrated charge pump for high-side NFET protection with optional auto-recovery
• Extensive protection suite including voltage, temperature, current, and internal diagnostics
• Two independent ADCs
– Supports simultaneous current and voltage sampling
– High-accuracy coulomb counter with input offset voltage error < 1µV (typical)
– High-accuracy cell voltage measurement < 10mV (typical)
• Wide-range current application (measurement range of ±200mV across the sense resistor)
• Integrated chemical fuse driver for secondary protection
• Autonomous or host-controlled cell balancing
• Multiple power modes (under typical battery pack operating range conditions)
– Normal mode: 286µA
– Multiple sleep mode options: 24µA to 41µA
– Multiple deep sleep mode options: 9µA to 10µA
– Shutdown mode: 1µA
• High-voltage tolerance up to 85V on battery connections and some other pins
• Supports random cell connection sequence on the production line
• Supports temperature detection using an internal sensor and up to nine external thermistors
• Integrated one-time programmable (OTP) memory that can be programmed by customers on the production line
• Communication options include 400kHz I2C, SPI, and HDQ single-wire interfaces
• Dual programmable LDOs for external system use
• 48-pin TQFP package (PFB)

Applications:
• Cordless power tools and garden tools
• Vacuum cleaners
• E-bikes, e-scooters, and LEVs
• Non-military drones
• Other industrial battery packs (3-series to 10-series)