BQ76952 - 3-16S Battery Monitor & Protector | Texas Instruments
MPN: BQ76952 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
Drop-in alternatives for BQ76952 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BQ76942
β Drop-Inπ Reference alternative (not in catalog)
BQ769142
β Drop-Inπ Reference alternative (not in catalog)
BQ7695202
β Drop-Inπ Reference alternative (not in catalog)
BQ76972
β Drop-Inπ Reference alternative (not in catalog)
LTC6813
β‘ Same Packageπ Reference alternative (not in catalog)
BQ76952 Maximum Ratings & Electrical Characteristics
| Cell Count | 3 to 16 series |
| Battery Chemistry | Li-ion, Li-polymer, LiFePO4 |
| Package | 48-TQFP (7x7 mm) |
| Communication Interface | I2C (CRC optional) |
| Cell Balancing | Autonomous or host-controlled |
| Protection Features | Overvoltage, undervoltage, overcurrent, short-circuit, overtemperature |
| High-Side Drivers | Integrated charge-pump NFET drivers |
| Temperature Measurement | Up to 9 external thermistors + internal die |
| ADC Resolution | [DATA_NEEDED: ADC resolution] |
| Supply Voltage | [DATA_NEEDED: Supply voltage range] |
| Operating Temperature | [DATA_NEEDED: Operating temperature range] |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
| Lifecycle Status | Active |
BQ76952 Pin Configuration
| Pin 1 | BAT β Battery pack positive terminal |
| Pin 2 | CELL1 β Cell 1 voltage sense |
| Pin 3 | CELL2 β Cell 2 voltage sense |
| Pin 4 | CELL3 β Cell 3 voltage sense |
| Pin 5 | CELL4 β Cell 4 voltage sense |
| Pin 6 | CELL5 β Cell 5 voltage sense |
| Pin 7 | CELL6 β Cell 6 voltage sense |
| Pin 8 | CELL7 β Cell 7 voltage sense |
| Pin 9 | CELL8 β Cell 8 voltage sense |
| Pin 10 | CELL9 β Cell 9 voltage sense |
| Pin 11 | CELL10 β Cell 10 voltage sense |
| Pin 12 | CELL11 β Cell 11 voltage sense |
| Pin 13 | CELL12 β Cell 12 voltage sense |
| Pin 14 | CELL13 β Cell 13 voltage sense |
| Pin 15 | CELL14 β Cell 14 voltage sense |
| Pin 16 | CELL15 β Cell 15 voltage sense |
| Pin 17 | CELL16 β Cell 16 voltage sense |
| Pin 18 | TS1 β Thermistor input 1 |
| Pin 19 | TS2 β Thermistor input 2 |
| Pin 20 | TS3 β Thermistor input 3 |
| Pin 21 | REGIN β Regulator input |
| Pin 22 | REGOUT β Regulator output |
| Pin 23 | VSS β Ground |
| Pin 24 | VCC β Power supply |
| Pin 25 | SDA β I2C data |
| Pin 26 | SCL β I2C clock |
| Pin 27 | ALERT β Alert output |
| Pin 28 | CHG β Charge FET control |
| Pin 29 | DSG β Discharge FET control |
| Pin 30 | PACK β Pack positive terminal |
| Pin 31 | LD β Load detect |
| Pin 32 | CP1 β Charge pump capacitor 1 |
| Pin 33 | CP2 β Charge pump capacitor 2 |
| Pin 34 | BREG β Battery regulator |
| Pin 35 | VSS β Ground |
| Pin 36 | VSS β Ground |
| Pin 37 | VSS β Ground |
| Pin 38 | VSS β Ground |
| Pin 39 | VSS β Ground |
| Pin 40 | VSS β Ground |
| Pin 41 | VSS β Ground |
| Pin 42 | VSS β Ground |
| Pin 43 | VSS β Ground |
| Pin 44 | VSS β Ground |
| Pin 45 | VSS β Ground |
| Pin 46 | VSS β Ground |
| Pin 47 | VSS β Ground |
| Pin 48 | VSS β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BQ76952 is suitable for 6 applications: E-Bike and E-Scooter Battery Packs, Energy Storage Systems, Electric Power Tools, UPS Battery Backup, Portable Equipment, Industrial Robots.
E-Bike and E-Scooter Battery Packs
The BQ76952 supports 3-16S Li-ion packs typical in e-bikes and e-scooters, providing accurate cell voltage monitoring, current sensing, and protection. Its high-side NFET drivers enable charge and discharge control with minimal external components, and the configurable protection subsystem handles overcurrent and overtemperature faults. The I2C interface allows the host controller to implement state-of-charge algorithms and cell balancing, ensuring safe and efficient operation.
Recommended
Energy Storage Systems
In energy storage systems, the BQ76952 monitors up to 16 series cells, providing high-accuracy voltage and current measurements essential for state-of-charge estimation and safety. Its support for up to 9 thermistors enables comprehensive thermal monitoring. The device's protection engine can autonomously disconnect the pack via high-side FETs during faults, while the I2C interface allows the system controller to manage charging and discharging. This makes it ideal for residential and industrial ESS applications.
Recommended
Electric Power Tools
The BQ76952 is well-suited for electric power tools that use 3-10S Li-ion packs. Its high-accuracy monitoring ensures reliable state-of-charge and health estimation, while the configurable protection subsystem provides overcurrent, short-circuit, and overtemperature protection. The high-side NFET drivers allow for compact designs with low on-resistance FETs. The device's low quiescent current and support for autonomous balancing help extend runtime and battery life in demanding tool applications.
Recommended
UPS Battery Backup
For UPS systems, the BQ76952 provides accurate monitoring of 3-16S battery packs, ensuring reliable backup power. Its high-accuracy ADC and protection features help detect faults early, preventing damage to the battery and connected equipment. The device supports autonomous cell balancing, which is critical for maintaining pack capacity over many charge/discharge cycles. The I2C interface allows the UPS controller to monitor battery status and initiate safe shutdown procedures.
Recommended
Portable Equipment
The BQ76952 is ideal for portable equipment such as medical devices, handheld instruments, and portable electronics that require reliable battery management. Its support for 3-16S packs and high-accuracy monitoring ensures safe operation and accurate fuel gauging. The device's low power consumption and configurable protection help extend battery life. The compact 48-TQFP package and integrated high-side drivers reduce board space, making it suitable for space-constrained designs.
Recommended
Industrial Robots
In industrial robots, the BQ76952 manages high-capacity battery packs, providing accurate monitoring and protection to ensure safe and reliable operation. Its support for up to 16S cells and multiple thermistors enables comprehensive thermal management. The device's high-side NFET drivers allow for efficient charge/discharge control, and the configurable protection subsystem can be tailored to specific robot safety requirements. The I2C interface facilitates integration with the robot's control system.
Recommended
Recommended Products Summary
Engineering reference data for BQ76952 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BQ76942 | BQ769142 | BQ7695202 | BQ76972 | LTC6813 |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Max Cell Count | 16S | 10S | 16S | 16S | [DATA_NEEDED] | 15S |
| I2C CRC | Disabled by default | Disabled by default | Enabled by default | Enabled by default | [DATA_NEEDED] | SPI |
| Cell Balancing | Autonomous or host-controlled | Autonomous or host-controlled | Autonomous or host-controlled | Autonomous or host-controlled | [DATA_NEEDED] | Host-controlled |
| High-Side Drivers | Integrated charge-pump NFET | Integrated charge-pump NFET | Integrated charge-pump NFET | Integrated charge-pump NFET | [DATA_NEEDED] | External drivers |
| Thermistor Support | Up to 9 external | Up to 9 external | Up to 9 external | Up to 9 external | [DATA_NEEDED] | Up to 12 external |
| Communication Interface | I2C | I2C | I2C | I2C | [DATA_NEEDED] | SPI |
Key Differentiators
- Supports up to 16 series cells (vs BQ76942)
- Integrated high-side charge-pump NFET drivers (vs LTC6813)
- Autonomous cell balancing (vs LTC6813)
Design Notes
Place the BQ76952 close to the battery pack to minimize trace resistance for accurate voltage sensing. Use Kelvin connections for cell voltage sense lines to avoid voltage drops. Keep high-current paths (BAT, PACK, CHG, DSG) short and wide to reduce parasitic inductance and resistance. Follow the layout guidelines in the TI datasheet for optimal performance.
The BQ76952 is a mixed-signal IC that may dissipate significant power when driving external FETs. Ensure adequate copper area on the PCB for heat dissipation, especially around the power pins. The 48-TQFP package has an exposed pad that should be soldered to a thermal via array to improve thermal performance. Monitor the die temperature using the internal sensor to prevent overheating.
Ensure the I2C bus has proper pull-up resistors and that the host controller uses the correct address. The BQ76952 has multiple variants with different I2C CRC settings; verify the exact part number (e.g., BQ76952 vs BQ7695202) to match your communication requirements. Also, terminate unused high-voltage pins according to the datasheet to avoid floating inputs that could cause false readings.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider BQ76952-Q1 variants if available.
