TI BQ76942PFBR

BQ76942 is a highly integrated, high-accuracy battery monitor and protector for 3-series to 10-series lithium-ion, lithium polymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system and a highly configurable protection subsystem, with support for 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 supporting 400kHz I2C, SPI, and HDQ single-wire standards. The BQ76942 is available in a 48-pin TQFP package.

• Battery monitoring for 3-series to 10-series cell configurations
• Integrated charge pump for high-side NFET protection with optional auto-recovery
• Comprehensive protection suite covering voltage, temperature, current, and internal diagnostics
• Two independent ADCs
• Synchronous 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 applications (±200mV measurement range across sense resistor)
• Integrated chemical fuse-driven secondary protection
• Autonomous or host-controlled cell balancing
• Multiple power modes (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
• 85V high-voltage tolerance on battery connection and select other pins
• Supports random cell connection sequences in production line
• Temperature sensing via internal sensor and up to nine external thermistors
• Integrated one-time programmable (OTP) memory for customer programming on production line
• Communication options: 400kHz I2C, SPI, and HDQ single-wire interface
• Dual programmable LDOs for external system use
• 48-pin TQFP package (PFB)

• Cordless power tools and garden tools
• Vacuum cleaners
• E-bikes, e-scooters, and LEVs
• Other industrial battery packs (3S to 10S)