The bq20z655-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track? technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z655-R1 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z655-R1 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack which reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short circuit and overload protection, the bq20z655-R1 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.
The implemented Impedance Track? gas gauging technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle with high accuracy.
Next Generation Patented Impedance Track? Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
Better Than 1% Error Over the Lifetime of the Battery
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
Voltage, Current, and Temperature
Satisfies JEITA Guidelines
Added Flexibility to Handle More Complex Charging Profiles
Lifetime Data Logging
Drives 3, 4, or 5 Segment Liquid Crystal Display and LED for Battery-Pack Conditions
Supports SHA-1 Authentication
Complete Battery Protection and Gas Gauge Solution in One Package
The bq20z655-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track? technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z655-R1 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z655-R1 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack which reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short circuit and overload protection, the bq20z655-R1 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.
The implemented Impedance Track? gas gauging technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle with high accuracy.
Battery Type
Li-Ion, Li-Poly
Output Voltage
25 V
Output Current
18 uA
Operating Supply Voltage
4.5 V to 25 V
Maximum Operating Temperature
+ 100 C
Minimum Operating Temperature
- 40 C
Package / Case
TSSOP-44
Packaging
Reel
Charge Safety Timers
Yes
Mounting Style
SMD/SMT
Operating Supply Current
550 uA
Product Type
Fuel Gauges
Series
BQ20Z655-R1
Factory Pack Quantity
2000
Temperature Monitoring
Yes