Overview
The BQ34Z100-G1 device from Texas Instruments is a multi-chemistry Impedance Track™ standalone fuel gauge designed to support a wide range of battery chemistries, including Li-ion, LiFePO4, PbA, NiMH, and NiCd. This fuel gauge operates independently of battery series-cell configurations and can support batteries with voltages ranging from 3 V to 65 V through an external voltage translation circuit. The device is optimized for high accuracy in state-of-charge predictions using Texas Instruments' proprietary Impedance Track algorithm, which utilizes voltage measurements and cell characteristics to achieve accuracy with as little as 1% error across various operating conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 14-pin TSSOP | - |
| Operating Temperature Range | -40 to 85 | °C |
| Battery Voltage Range | 3 to 65 | V |
| Maximum Battery Capacity | Up to 29 Ah (standard configuration) | Ah |
| Maximum Charge/Discharge Current | Up to 32 A (standard configuration) | A |
| Communication Interfaces | I2C, HDQ | - |
| Power Modes | NORMAL: < 145 µA, SLEEP: < 84 µA, FULL SLEEP: < 30 µA | µA |
| Thermal Resistance (Junction-to-Ambient) | 103.8 | °C/W |
Key Features
- Supports Li-ion, LiFePO4, PbA, NiMH, and NiCd battery chemistries
- Capacity estimation using patented Impedance Track™ technology
- Aging and self-discharge compensation
- External NTC thermistor support
- Two-wire I2C and HDQ single-wire communication interfaces
- SHA-1/HMAC authentication
- One- or four-LED direct display control, and five-LED or higher display through port expander
- Reduced power modes: NORMAL, SLEEP, and FULL SLEEP
Applications
- Light electric vehicles
- Medical instrumentation
- Mobile radios
- Power tools
- Uninterruptible power supplies (UPS)
Q & A
- What battery chemistries does the BQ34Z100-G1 support?
The BQ34Z100-G1 supports Li-ion, LiFePO4, PbA, NiMH, and NiCd battery chemistries.
- What is the operating temperature range of the BQ34Z100-G1?
The operating temperature range is from -40°C to 85°C.
- What is the maximum battery capacity supported by the BQ34Z100-G1?
The device supports battery capacities up to 29 Ah with standard configuration options.
- What communication interfaces does the BQ34Z100-G1 support?
The device supports two-wire I2C and HDQ single-wire communication interfaces.
- Does the BQ34Z100-G1 support external temperature measurement?
- What are the power modes available in the BQ34Z100-G1?
The device has NORMAL, SLEEP, and FULL SLEEP power modes.
- How accurate is the state-of-charge prediction of the BQ34Z100-G1?
The device can achieve state-of-charge predictions with an accuracy of as little as 1% error using the Impedance Track algorithm.
- Can the BQ34Z100-G1 be used in high-current applications?
- What is the typical current consumption in the FULL SLEEP mode?
The typical current consumption in FULL SLEEP mode is less than 30 µA.
- Does the BQ34Z100-G1 support LED display control?
