Overview
The BQ34110PWR, produced by Texas Instruments, is a multi-chemistry high-cell count battery fuel gauge designed for applications where batteries are rarely discharged. This device is particularly suited for backup systems, such as uninterruptible power supplies (UPS), enterprise server backup systems, and telecommunications backup modules. The BQ34110PWR uses Compensated End-of-Discharge Voltage (CEDV) technology to provide accurate State-Of-Charge (SOC) and State-Of-Health (SOH) data for single- and multi-cell batteries. It supports various battery chemistries including Li-Ion, LiFePO4, lead-acid (PbA), Nickel Metal Hydride (NiMH), and Nickel Cadmium (NiCd).
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (PW) with 14 pins |
| Operating Temperature Range | -40°C to 85°C |
| Maximum Voltage | Up to 65 V |
| Maximum Capacity | Up to 32 Ah |
| Maximum Current | Up to 32 A |
| I2C Communication Frequency | 400 kHz |
| Power Modes | NORMAL, SNOOZE, SLEEP, SHUTDOWN |
| Thermal Resistance (Junction-to-Ambient) | 103.8 °C/W |
| Supply Current (NORMAL mode) | 133 µA (typical) |
| Supply Current (SNOOZE mode) | 53 µA (typical) |
| Supply Current (SLEEP mode) | 22 µA (typical) |
| Supply Current (SHUTDOWN mode) | 0.01 µA (typical) |
Key Features
- Accurate End-Of-Service (EOS) Determination for batteries in rarely discharged applications
- Compensated End-of-Discharge Voltage (CEDV) gas gauge for single- and multi-cell batteries
- Provides State-Of-Charge (SOC), Time-To-Empty (TTE), and State-Of-Health (SOH) data
- Watt-Hour–Based Charge Termination
- Supports multiple battery chemistries: Li-Ion, LiFePO4, lead-acid (PbA), NiMH, and NiCd
- Dual configurable host interrupt or GPO
- Lifetime data logging options
- Precision Coulomb counter, voltage, and temperature measurement
- Power enable control
- I2C communication with host
- Accumulated charge Coulomb counting with configurable interrupt
- SHA-1 authentication
Applications
- UPS Backup Systems
- Telematics Backup Systems
- Emergency Battery Power Modules
- Energy Storage Systems
- Asset Tracking
- Building Security Systems
- Video Surveillance
- Electronic Smart Locks
- Remote and Emergency Lighting
- Server Power Systems
- Robotics and Toys
Q & A
- What is the BQ34110PWR used for? The BQ34110PWR is a multi-chemistry battery fuel gauge used in applications where batteries are rarely discharged, such as in backup systems.
- Which battery chemistries does the BQ34110PWR support? It supports Li-Ion, LiFePO4, lead-acid (PbA), Nickel Metal Hydride (NiMH), and Nickel Cadmium (NiCd) chemistries.
- What is the maximum voltage and current the BQ34110PWR can handle? The device can handle voltages up to 65 V and currents up to 32 A.
- How does the BQ34110PWR communicate with the host? It communicates through an I2C interface with a frequency of up to 400 kHz.
- What power modes does the BQ34110PWR have? The device has NORMAL, SNOOZE, SLEEP, and SHUTDOWN power modes.
- What is the purpose of the End-Of-Service (EOS) Determination function? The EOS Determination function alerts when the battery capability has degraded and is approaching the end of its usable service.
- How does the BQ34110PWR measure battery current? The battery current is measured by monitoring the voltage across a series resistor (RSENSE) placed in series with the battery pack.
- What type of authentication does the BQ34110PWR support? It supports SHA-1 authentication.
- Can the BQ34110PWR log data over its lifetime? Yes, it has lifetime data logging options.
- What is the thermal resistance of the BQ34110PWR in the TSSOP package? The junction-to-ambient thermal resistance is 103.8 °C/W.
- How many bytes of user-programmable data flash memory does the BQ34110PWR have? It has 32 bytes of user-programmable data flash memory.
