Overview
The bq20z655-R1, produced by Texas Instruments, is a Smart Battery Specification (SBS) V1.1-compliant gas gauge and protection IC. This device is designed for battery-pack or in-system installation and is particularly suited for Li-ion and Li-polymer batteries. It incorporates Texas Instruments' patented Impedance Track™ technology, which accurately measures the available charge in batteries with better than 1% error over the battery's lifetime. The bq20z655-R1 features a powerful 8-bit RISC CPU with ultralow power modes and integrates high-performance analog peripherals to monitor critical battery parameters such as capacity change, impedance, and open-circuit voltage.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC, BAT) | 4.5 | - | 25 | V |
| Minimum Startup Voltage (VCC, BAT, PACK) | 5.5 | - | 6 | V |
| Operating Free-Air Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| Regulator Output Voltage (REG25) | 2.41 | 2.5 | 2.59 | V |
| SMBus Operating Frequency | 10 | - | 100 | kHz |
Key Features
- Next Generation Patented Impedance Track™ technology for accurate battery charge measurement.
- Supports Smart Battery Specification (SBS) V1.1.
- Flexible configuration for 2-series to 4-series battery packs.
- Powerful 8-bit RISC CPU with ultralow power modes.
- Full array of programmable protection features including voltage, current, and temperature protection.
- Lifetime data logging and support for complex charging profiles.
- Drives 3, 4, or 5 segment liquid crystal display (LCD) and LED for battery-pack conditions.
- Satisfies JEITA guidelines.
Applications
- Medical and test equipment.
- Portable instrumentation.
- Rechargeable battery packs.
- Industrial equipment.
Q & A
- What is the primary function of the bq20z655-R1?
The primary function of the bq20z655-R1 is to accurately measure and maintain a record of available charge in Li-ion and Li-polymer batteries using Impedance Track™ technology.
- What are the supported battery configurations for the bq20z655-R1?
The bq20z655-R1 supports flexible configurations for 2-series to 4-series battery packs.
- What protection features does the bq20z655-R1 offer?
The bq20z655-R1 offers a full array of programmable protection features including voltage, current, and temperature protection.
- How does the bq20z655-R1 communicate with the system host?
The bq20z655-R1 communicates with the system host over a serial-communication bus, specifically using SMBus.
- What is the operating temperature range of the bq20z655-R1?
The operating free-air temperature range of the bq20z655-R1 is from -40°C to 85°C.
- Does the bq20z655-R1 support lifetime data logging?
- What display options are available with the bq20z655-R1?
The bq20z655-R1 can drive 3, 4, or 5 segment liquid crystal displays (LCD) and LEDs for battery-pack conditions.
- Is the bq20z655-R1 compliant with any specific battery standards?
- What is the typical regulator output voltage of the bq20z655-R1?
The typical regulator output voltage (REG25) of the bq20z655-R1 is 2.5 V.
- What is the maximum combined sink current for input pins on the bq20z655-R1?
The maximum combined sink current for input pins on the bq20z655-R1 is 50 mA.
