BQ76905RGRR中文资料德州仪器数据手册PDF规格书

1 Features

• Battery monitoring capability for 2-series to 5-

series cells

• Integrated low-side drivers for NFET protection

with optional autonomous recovery

• Extensive protection suite including voltage,

temperature, current, and internal diagnostics

• 16-bit delta-sigma voltage ADC

– High-accuracy cell voltage measurement of 4

mV (typical)

• A dedicated simultaneous 16- and 24-bit deltasigma

coulomb counter ADC

• – High-accuracy current measurement with low

input offset error

– Wide-range current applications (±200-mV

measurement range across sense resistor)

– 48-bit accumulated charge integrator with timer

• Host-controlled cell balancing

• Multiple power modes (typical battery pack

operating range conditions)

– NORMAL mode: 32 μA to 175 μA

– SLEEP mode: 6 μA

– DEEPSLEEP mode: 2.7 μA

– SHUTDOWN Mode: <1 μA

• High voltage tolerance of 45 V on cell connect and

select additional pins

• Support for temperature sensing using an internal

sensor and external thermistor

• Integrated one-time-programmable (OTP) memory

for device settings, programmed by TI

• 400-kHz I2C serial communications with optional

CRC support

• Programmable LDO for external system usage

• 20-pin QFN (RGR) package

2 Applications

• Cordless power tools and garden tools

• Vacuum cleaners

• Non-military drones

• Other industrial battery pack (2 series to 5 series)

3 Description

The Texas Instruments BQ76905 provides a

highly integrated, high-accuracy battery monitor and

protector for 2-series to 5-series Li-ion, Li-polymer,

LiFePO4 (LFP), and LTO battery packs. Each device

includes a high-accuracy monitoring system, a highly

configurable protection subsystem, and support for

host-controlled cell balancing. Integration includes

low-side protection NFET drivers, a programmable

LDO for external system use, and an I2C host

communication interface supporting up to 400-kHz

operation with optional CRC. The BQ76905 is

available in a 20-pin QFN package.