Overview
The BQ20Z655DBTR-R1, produced by Texas Instruments, is a sophisticated battery management IC designed to accurately measure and maintain the state of charge in Li-ion and Li-polymer batteries. This device incorporates Texas Instruments' patented Impedance Track™ technology, which ensures superior gas-gauging accuracy by continuously analyzing battery impedance. It supports the Smart Battery Specification (SBS) V1.1 and is suitable for a wide range of applications, including medical and test equipment, portable instrumentation, and industrial equipment. The BQ20Z655-R1 integrates a powerful 8-bit RISC CPU with ultralow power modes, making it an efficient solution for battery management systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Minimum Operating Temperature | -40 | °C | ||
| Operating Supply Current (Normal Mode) | 550 | μA | ||
| Operating Supply Current (Sleep Mode, CHG FET on; DSG FET on) | 124 | μA | ||
| Operating Supply Current (Sleep Mode, CHG FET off; DSG FET on) | 90 | μA | ||
| Operating Supply Current (Sleep Mode, CHG FET off; DSG FET off) | 52 | μA | ||
| Shutdown Current | 0.1 | 1 | μA | |
| Regulator Output Voltage (3.3V) | 3.0 | 3.3 | 3.6 | V |
| Wake Threshold Voltage | 1.25 | 10 | mV |
Key Features
- Accurate measurement of available charge in Li-ion and Li-polymer batteries using Impedance Track™ technology, with better than 1% error over the battery's lifetime.
- Supports Smart Battery Specification (SBS) V1.1.
- Flexible configuration for 2-series to 4-series Li-ion and Li-polymer cells.
- Powerful 8-bit RISC CPU with ultralow power modes.
- Full array of programmable protection features including voltage, current, and temperature protection.
- Lifetime data logging capability.
- Drives 3, 4, or 5 segment liquid crystal display (LCD) and LED for battery-pack conditions.
- Supports SHA-1 authentication.
- Integrated analog front-end (AFE) for short circuit and overload protection.
- Improved FET turn-on time upon exit of shutdown mode.
Applications
- Medical and test equipment.
- Portable instrumentation.
- Industrial equipment.
- Rechargeable battery packs.
Q & A
- What is the primary function of the BQ20Z655DBTR-R1?
The primary function of the BQ20Z655DBTR-R1 is to accurately measure and maintain the state of charge in Li-ion and Li-polymer batteries using Impedance Track™ technology.
- Which Smart Battery Specification does the BQ20Z655DBTR-R1 support?
The BQ20Z655DBTR-R1 supports the Smart Battery Specification (SBS) V1.1.
- What is the operating temperature range of the BQ20Z655DBTR-R1?
The operating temperature range of the BQ20Z655DBTR-R1 is from -40°C to 85°C.
- What types of protection features does the BQ20Z655DBTR-R1 offer?
The BQ20Z655DBTR-R1 offers programmable protection features including voltage, current, and temperature protection.
- Can the BQ20Z655DBTR-R1 drive LCD displays?
Yes, the BQ20Z655DBTR-R1 can drive 3, 4, or 5 segment liquid crystal displays (LCD) and LEDs for battery-pack conditions.
- What is the typical operating supply current of the BQ20Z655DBTR-R1 in normal mode?
The typical operating supply current of the BQ20Z655DBTR-R1 in normal mode is 550 μA.
- Does the BQ20Z655DBTR-R1 support SHA-1 authentication?
Yes, the BQ20Z655DBTR-R1 supports SHA-1 authentication.
- What are some common applications of the BQ20Z655DBTR-R1?
Common applications include medical and test equipment, portable instrumentation, industrial equipment, and rechargeable battery packs.
- How does the BQ20Z655DBTR-R1 enhance system level interactions?
The BQ20Z655DBTR-R1 enhances system level interactions through improved FET turn-on time upon exit of shutdown, updates to remaining capacity and full charge capacity calculations, and SBS 1.1 master mode bus start collision updates.
- What is the shutdown current of the BQ20Z655DBTR-R1?
The shutdown current of the BQ20Z655DBTR-R1 is typically 1 μA.
