Overview
The Texas Instruments bq4050RSMR is a highly integrated, accurate gas gauge and protection solution designed for 1-series to 4-series cell Li-Ion and Li-Polymer battery packs. This device incorporates Compensated End-of-Discharge Voltage (CEDV) technology, enabling autonomous charger control and cell balancing. The bq4050RSMR features a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication, making it a comprehensive battery management solution. It communicates via an SMBus-compatible interface and includes an ultra-low power, high-speed processor, high-accuracy analog measurement capabilities, and integrated flash memory.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VQFN (RSM) | - |
| Pins | 32 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.5 to 4.5 | V |
| Current Wake Comparator Threshold | 10 to 100 | mV |
| Analog Front End ADC Resolution | 12-bit | - |
| Coulomb Counter Input Offset Error | < 1 μV (Typical) | μV |
| Communication Interface | 100-KHz SMBus v1.1, Alternate 400-KHz Mode | - |
Key Features
- High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions
- Cell Balancing with Internal Bypass Optimizes Battery Health
- Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis
- Full Array of Programmable Protection Features: Voltage, Current, Temperature
- JEITA Charge Algorithms Support Smart Charging
- Analog Front End with Two Independent ADCs for Simultaneous Current and Voltage Sampling
- High-Accuracy Coulomb Counter with Input Offset Error < 1 μV (Typical)
- Supports Battery Trip Point (BTP) Function for Windows® Integration
- LED Display for State of Charge and Battery Status Indication
- SHA-1 Authentication Responder for Increased Battery Pack Security
Applications
- Notebooks
- Medical and Test Equipment
- Portable Instrumentation
- Cordless Vacuum Cleaners and Vacuum Robots
Q & A
- What is the primary function of the bq4050RSMR?
The primary function of the bq4050RSMR is to provide a highly integrated gas gauge and protection solution for 1-series to 4-series cell Li-Ion and Li-Polymer battery packs.
- What type of CPU does the bq4050RSMR use?
The bq4050RSMR uses a flash programmable custom reduced instruction-set CPU (RISC).
- What communication interface does the bq4050RSMR support?
The bq4050RSMR supports a 100-KHz SMBus v1.1 interface with an alternate 400-KHz mode.
- What is the operating temperature range of the bq4050RSMR?
The operating temperature range of the bq4050RSMR is -40 to 85°C.
- Does the bq4050RSMR support cell balancing?
Yes, the bq4050RSMR supports cell balancing with an internal bypass to optimize battery health.
- What security feature does the bq4050RSMR include?
The bq4050RSMR includes a SHA-1 Authentication Responder for increased battery pack security.
- What types of protection features are available on the bq4050RSMR?
The bq4050RSMR offers a full array of programmable protection features including voltage, current, and temperature protection.
- Does the bq4050RSMR support smart charging algorithms?
Yes, the bq4050RSMR supports JEITA charge algorithms for smart charging.
- What is the package type and pin count of the bq4050RSMR?
The bq4050RSMR comes in a 32-pin VQFN (RSM) package.
- What is the typical input offset error of the Coulomb Counter in the bq4050RSMR?
The typical input offset error of the Coulomb Counter is less than 1 μV.
