Overview
The BQ40Z80RSMT, produced by Texas Instruments, is a fully integrated, single-chip battery management solution designed for 2-series to 6-series lithium-ion (Li-ion) and lithium-polymer (Li-polymer) battery packs. This device incorporates patented Impedance Track™ technology to accurately measure available charge in Li-ion and Li-polymer batteries. It provides a comprehensive set of features for gas gauging, protection, and authentication, making it a robust solution for various battery-powered applications.
The BQ40Z80RSMT uses its integrated high-performance analog peripherals to measure and maintain accurate records of available capacity, voltage, current, temperature, and other critical parameters. This information is reported to the system host controller via an SMBus v1.1 compatible interface. The device also supports Elliptic Curve Cryptography (ECC) or SHA-1 authentication to ensure the identification of genuine battery packs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VQFN (RSM) | - |
| Pins | 32 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range (VCC, BAT, PACK) | -0.3 to 35 | V |
| Input Voltage Range (SMBC, SMBD, DISP/GPIO, etc.) | -0.3 to 35 | V |
| Junction-to-Ambient Thermal Resistance (RθJA) | 47.4 | °C/W |
| Junction-to-Case (Top) Thermal Resistance (RθJC) | 40.3 | °C/W |
| Internal Reference Voltage (VREF1) | 1.215 to 1.225 | V |
Key Features
- Fully integrated 2-series to 6-series Li-ion or Li-polymer cell battery pack manager and protection.
- Next-generation patented Impedance Track™ Technology for accurate charge measurement.
- Configurable multifunction pins to support various applications.
- Supports Elliptic Curve Cryptography (ECC) or SHA-1 authentication.
- High-side N-CH protection FET drive and integrated cell balancing.
- Supports 29-Ah batteries natively, and larger capacities with scaling.
- Full array of programmable protection features including voltage, current, temperature, and charge timeout.
- Sophisticated charge algorithms including JEITA, enhanced charging, and adaptive charging.
- Supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2).
- Diagnostic Lifetime Data Monitor and Black Box Recorder.
- LED display and two-wire SMBus v1.1 interface.
- IATA support and compact 32-lead QFN (RSM) package.
Applications
- Industrial Appliances and Robots.
- Handheld Garden and Power Tools.
- Battery Powered Vacuums.
- Energy Storage Systems and UPS.
Q & A
- What is the BQ40Z80RSMT used for?
The BQ40Z80RSMT is a battery management IC designed for managing and protecting 2-series to 6-series Li-ion or Li-polymer battery packs.
- What is the operating temperature range of the BQ40Z80RSMT?
The operating temperature range is -40°C to 85°C.
- What authentication methods does the BQ40Z80RSMT support?
The device supports either Elliptic Curve Cryptography (ECC) or SHA-1 authentication.
- What is the maximum battery capacity supported by the BQ40Z80RSMT?
The device natively supports 29-Ah batteries and can support larger capacities with scaling.
- Does the BQ40Z80RSMT have integrated cell balancing?
Yes, it has integrated cell balancing while charging or at rest.
- What interface does the BQ40Z80RSMT use for communication?
The device uses a two-wire SMBus v1.1 interface for communication with the host controller.
- What are some of the programmable protection features of the BQ40Z80RSMT?
The device includes programmable protection features for voltage, current, temperature, and charge timeout.
- Does the BQ40Z80RSMT support any specific battery power technologies?
Yes, it supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2).
- What is the package type and pin count of the BQ40Z80RSMT?
The device comes in a 32-lead VQFN (RSM) package.
- What are some typical applications of the BQ40Z80RSMT?
Typical applications include industrial appliances, handheld garden and power tools, battery-powered vacuums, and energy storage systems.
