Overview
The Texas Instruments BQ7695204PFBR is a highly integrated, high-accuracy battery monitor and protector designed for lithium-ion, lithium-polymer, and lithium iron phosphate (LiFePO4) battery packs. This device supports battery configurations ranging from 3-series to 16-series cells, making it versatile for various battery management applications. It features a comprehensive protection suite, advanced monitoring capabilities, and multiple communication interfaces, ensuring reliable and efficient battery management.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | BQ7695204PFBR |
| Package | 48-pin TQFP (7x7) |
| Number of Cells | 3-series to 16-series |
| Battery Chemistry | Li-ion, Li-polymer, LiFePO4 |
| Operating Temperature | -40°C to 85°C |
| Interface | SPI, 400-kHz I²C, HDQ one-wire |
| Power Modes | NORMAL: 286 µA, SLEEP: 24 µA to 41 µA, DEEPSLEEP: 9 µA to 10 µA, SHUTDOWN: 1 µA |
| Protection Features | Voltage, temperature, current, internal diagnostics, high-side NFET protection |
| Additional Features | Integrated charge pump, dual ADCs, high-accuracy coulomb counter, cell balancing, temperature sensing |
Key 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 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 for low power consumption
- High-voltage tolerance of 85 V on cell connect and select additional pins
- 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
- Dual-programmable LDOs for external system usage
Applications
The BQ7695204PFBR is suitable for a wide range of battery management applications, including but not limited to:
- Lithium-ion and lithium-polymer battery packs in consumer electronics
- Electric vehicles and hybrid electric vehicles
- Energy storage systems
- Industrial power tools and equipment
- Medical devices requiring high reliability and accuracy in battery management
Q & A
- What is the BQ7695204PFBR used for?
The BQ7695204PFBR is a high-accuracy battery monitor and protector for lithium-ion, lithium-polymer, and LiFePO4 battery packs.
- What is the operating temperature range of the BQ7695204PFBR?
The operating temperature range is -40°C to 85°C.
- What communication interfaces does the BQ7695204PFBR support?
The device supports SPI, 400-kHz I²C, and HDQ one-wire interfaces.
- What are the key protection features of the BQ7695204PFBR?
The device includes protection features such as voltage, temperature, current, and internal diagnostics, as well as high-side NFET protection.
- Does the BQ7695204PFBR support cell balancing?
Yes, it supports both autonomous and host-controlled cell balancing.
- What is the package type and pin count of the BQ7695204PFBR?
The device is packaged in a 48-pin TQFP (7x7).
- What are the power modes available on the BQ7695204PFBR?
The device has NORMAL, SLEEP, DEEPSLEEP, and SHUTDOWN power modes.
- Can the BQ7695204PFBR measure temperature?
Yes, it supports temperature sensing using an internal sensor and up to nine external thermistors.
- Is the BQ7695204PFBR RoHS compliant?
Yes, the device is RoHS compliant.
- What is the typical input offset error of the coulomb counter in the BQ7695204PFBR?
The typical input offset error is less than 1 µV.
