Texas Instruments BQ76952 | Demoboard BQ76952EVM

Description

The Texas Instruments BQ76952 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual programmable LDOs for external system use, and a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards. The BQ76952 device is available in a 48-pin TQFP package.

Features

• Battery monitoring capability for 3-series to 16-series cells
• Integrated charge pump for high-side NFET protection with optional autonomous recovery
• Extensive protection suite including voltage, temperature, current, and internal diagnostics
• Two independent ADCs
• Support for simultaneous current and voltage sampling
• High-accuracy coulomb counter with input offset error < 1 µV (typical)
• High accuracy cell voltage measurement < 10 mV (typical)
• Wide-range current applications (±200-mV measurement range across sense resistor)
• Integrated secondary chemical fuse drive protection
• Autonomous or host-controlled cell balancing
• Multiple power modes (typical battery pack operating range conditions)
• NORMAL mode: 286 µA
• Multiple SLEEP mode options: 24 µA to 41 µA
• Multiple DEEPSLEEP mode options: 9 µA to 10 µA
• SHUTDOWN mode: 1 µA
• High-voltage tolerance of 85 V on cell connect and select additional pins
• Tolerant of random cell attach sequence on production line
• Support for temperature sensing using internal sensor and up to nine external thermistors
• Integrated one-time-programmable (OTP) memory programmable by customers on production line
• Communication options include 400-kHz I2C, SPI, and HDQ one-wire interface
• Dual-programmable LDOs for external system usage
• 48-pin TQFP package (PFB)

Typical applications

• E-bike, e-scooter and LEV, non-military drones
• Cordless power tools and garden tools
• Battery backup unit (BBU), other industrial battery pack (≥ 10S)

More information

• Datasheet
• IC product information