RT9426
Description
The RT9426 Li-Ion/Li-Polymer battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell battery packs. The RT9426 resides within the battery pack or on the system's main board and manages a non-removable battery or removable battery pack.
The RT9426 uses the Voltaic Gauge with Current Sensing (VGCS) algorithm to report State of Charge (SOC), State of Health (SOH), Full Charge Capacity (FCC), Time to Empty (TTE), and Cycle Count. It calculates the increasing or decreasing state of charge based on the voltage difference between the battery voltage and Open Circuit Voltage (OCV), and employs current sensing pensation to report battery SOC.
The Voltaic Gauge with Current Sensing algorithm can support smooth SOC tracking, and does not accumulate error over time and with current changes. That is an advantage pared to Coulomb counter which suffers from SOC drift caused by current sense errors and battery self-discharge.
The RT9426 provides a...
