BQ76905RGRR
Power Management
Technical Specifications
| Type | Description |
|---|---|
| Quiescent Current | 32 µA |
| 0V Battery Charge | - |
| Type of Battery | Lithium Battery;LiFePO4 Battery |
| The Chip Type | Monitoring IC;Protection IC |
| Balance Current | 50mA |
| Charge Current - Max | - |
| Type | Description |
|---|---|
| Operating Temperature | -40°C~+110°C |
| Interface | I2C |
| Supply Voltage | 3V~27.5V |
| Features | Cell balancing |
| Package / Case | VQFN-20-EP(3.5x3.5) |
Product Introduction
The 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.
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 delta-sigma 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
Applications
- Cordless power tools and garden tools
- Vacuum cleaners
- Drones
- Other industrial battery pack (2 series to 5 series)
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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