Overview
The Texas Instruments BQ76952 device, specifically the BQ7695202PFBR model, 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. This device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host-controlled cell balancing. It is available in a 48-pin TQFP package.
Key Specifications
| Specification | Value |
|---|---|
| Package | TQFP (PFB) with 48 pins |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Range | VSS–0.3 V to VSS+85 V |
| Current Consumption | NORMAL mode: 286 µA, SLEEP mode: 24 µA to 41 µA, DEEPSLEEP mode: 9 µA to 10 µA, SHUTDOWN mode: 1 µA |
| High-Voltage Tolerance | 85 V on cell connect and select additional pins |
| Communication Interfaces | 400-kHz I²C, SPI, and HDQ one-wire interface |
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 with support 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
- 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
- Battery backup units (BBU)
- E-bikes, e-scooters, and light electric vehicles (LEV)
- Cordless power tools and garden tools
- Non-military drones
- Other industrial battery packs (≥10S)
Q & A
- What is the BQ76952 device used for? The BQ76952 is a high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO4 battery packs.
- What package type does the BQ7695202PFBR come in? The BQ7695202PFBR comes in a 48-pin TQFP (PFB) package.
- What is the operating temperature range of the BQ76952? The operating temperature range is -40°C to 85°C.
- What are the current consumption modes of the BQ76952? The device has NORMAL mode (286 µA), SLEEP mode (24 µA to 41 µA), DEEPSLEEP mode (9 µA to 10 µA), and SHUTDOWN mode (1 µA).
- What communication interfaces does the BQ76952 support? The device supports 400-kHz I²C, SPI, and HDQ one-wire interface.
- Does the BQ76952 support temperature sensing? Yes, it supports temperature sensing using an internal sensor and up to nine external thermistors.
- Can the BQ76952 perform cell balancing? Yes, it supports autonomous or host-controlled cell balancing.
- What is the high-voltage tolerance of the BQ76952? The device has a high-voltage tolerance of 85 V on cell connect and select additional pins.
- Does the BQ76952 have integrated memory? Yes, it has integrated one-time-programmable (OTP) memory programmable by customers on the production line.
- What are some common applications of the BQ76952? Common applications include battery backup units, e-bikes, e-scooters, cordless power tools, and non-military drones.
