TI’s battery fuel (gas) gauge ICs accurately measure battery current, voltage and temperature to find state-of-charge. Patented Impedance Track™ technology allows the gauge to calculate remaining battery capacity without modeling or learning and provide 99% accuracy in reporting. With advanced MaxLife™ technology, smart gauges can control a charger to ensure more efficient charging as capacity increases. Protection and authentication solutions are also available.
General Purpose Gauging for Any Electronic Device
The bq27400 and bq27600 series of general purpose gauges are easy-to-configure system-side fuel gauges for single-cell battery packs.
Battery management with MaxLife™ charging technology
|Safety||Protections such as over-temperature, under-temperature, additional levels of over/under-voltage, discharge short circuit, discharge over-current, charge over-current|
|Measurement||Autonomously measures all cell voltages, integrated pack current and temperature every 1s (minimize dependence on host processor and improve standby power)|
|Capacity and Health Indication||
Implements TI’s advanced algorithms with measurement data to accurately track battery charge status and capacity degradation
Accurate State-Of-Health(SOH) enables accurate prediction of available capacity before system is disabled avoiding brown-out (prevalent problem in aged batteries or at cold temperatures)
Gauge uses chemistry knowledge (CHEMID) and learned SOH to control charger
Maximize battery life utilizing TI “MaxLife Algorithm” to enable fast charging without lithium plating
Overnight charging controls charge time to prevent storage degradation just before wake-up
|Black Box Forensics||Routinely stores highest/lowest and most significant battery parameters in nonvolatile flash memory for offline diagnostics or forensics (examples: # of charging cycles, min/max temperature, min/max voltages per cell, max charge and discharge current). Enables customer warranty end equipment based on actual usage by end user.|
|Adaptability||Customer-programmable data flash to suit different pack capacities, application constraints, and cell safety levels. Low cost of migration between models, generation and end equipment (tablet vs phone)|