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BQ76952PFBR

3-16S battery monitor/protector, Li-Ion/LiFePO4, 2 ADCs, TQFP-48

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Manufacturer Part：

BQ76952PFBR

Package：

TQFP-48 (7 x 7 x 1.0 mm)

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Description

Product Overview

The BQ76952PFBR from Texas Instruments is a highly integrated 3-series to 16-series high-accuracy battery monitor and protector for Li-Ion, Li-Polymer, and LiFePO4 battery packs. It features two independent ADCs, high-accuracy cell voltage measurement (<10 mV), coulomb counter with <1 uV offset, autonomous cell balancing, and I2C/SPI/HDQ communication in a 48-pin TQFP package.

Key Specifications

Cell Count 3S to 16S
Cell Chemistry Li-Ion, Li-Polymer, LiFePO4
Cell Voltage Accuracy <10 mV typical
Coulomb Counter Offset <1 uV typical
ADC Channels 2 independent ADCs
Communication 400 kHz I2C, SPI, HDQ
Cell Balancing Autonomous or host-controlled
Normal Mode Current 286 uA typical
Shutdown Mode Current 1 uA typical
High-Voltage Tolerance 85V on cell connect pins
Package TQFP-48 (7 x 7 mm)
Operating Temperature -40C to +85C

Features

  • Integrated charge pump for high-side NFET protection
  • Comprehensive protection: voltage, temperature, current, diagnostics
  • Simultaneous current and voltage sampling
  • Autonomous or host-controlled cell balancing
  • 9 external thermistor inputs + internal temperature sensor
  • One-time programmable (OTP) memory for customer configuration
  • Dual programmable LDOs for external system use

Applications

  • Electric bicycle and scooter battery packs
  • Cordless power tools
  • Energy storage systems
  • Industrial battery backup units

The BQ76952PFBR from Texas Instruments is a highly integrated high-accuracy battery monitor and protector designed for 3-series to 16-series Li-Ion, Li-Polymer, and LiFePO4 battery packs. It features two independent ADCs for simultaneous current and voltage sampling, achieving cell voltage measurement accuracy of less than 10 mV typical and coulomb counter input offset of less than 1 uV typical. The device integrates a charge pump for driving high-side NFET protection MOSFETs, enabling autonomous protection without host intervention. Support for up to nine external thermistors plus an internal temperature sensor provides comprehensive thermal monitoring. The integrated OTP memory allows customers to program custom configurations on the production line.

The BQ76952PFBR continuously monitors cell voltages, pack current, and temperatures using its dual ADC architecture. One ADC digitizes cell voltages and GPIO voltages while the other measures coulomb counter current across an external sense resistor, enabling simultaneous voltage and current sampling for accurate state-of-charge calculations. Protection thresholds are programmable via I2C/SPI/HDQ registers; when a fault is detected (overvoltage, undervoltage, overcurrent, overtemperature, etc.), the device autonomously drives the protection FETs off via the integrated charge pump. Cell balancing can be performed autonomously based on voltage differences or controlled by the host MCU. The device supports multiple power modes: NORMAL (286 uA), SLEEP (24-41 uA), DEEPSLEEP (9-10 uA), and SHUTDOWN (1 uA) to optimize battery life during storage and operation.

Pin Group Name Type Function
1-16 CELL0-CELL15 Analog Cell voltage measurement inputs
17 VC5 Power Top-of-stack connection
18-20 TS1-TS3 Analog External thermistor inputs
21-26 GPIO0-GPIO5 I/O General purpose I/O / ADC inputs
27 SRN Analog Current sense resistor negative
28 SRP Analog Current sense resistor positive
29 ALERT Output Alert output for host interrupt
30,31 SDA/SCL I/O I2C data and clock
32 HDQ I/O HDQ one-wire communication
33 DDSPI I/O SPI data in (daisy chain)
34-36 DDCLK/DDCS/DDSO I/O SPI clock, chip select, data out
37 REG1 Output LDO 1 output for external use
38 REG2 Output LDO 2 output for external use
39,40 CHG/DSG Output Charge/Discharge FET gate drives
41 PCHG Output Pre-charge FET gate drive
42 RST_SHUT I/O Reset/Shutdown control
  • Electric bicycle and scooter battery management systems
  • Cordless power tool battery pack monitoring
  • Energy storage system (ESS) cell monitoring and protection
  • Industrial UPS and battery backup unit management
  • Light electric vehicle (LEV) battery pack systems
Manufacturer Part Number Package Notes
TI BQ7695203PFBR TQFP-48 Pre-programmed OTP variant
TI BQ76940PFBR TQFP-48 9-15S, previous generation
TI BQ76942PFBR TQFP-48 3-10S variant
ADI LTC6811IG-1#3ZZPBF TQFP-48 12-cell monitor alternative
STMicroelectronics L9963E TQFP-64 16-cell battery management IC
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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