RT9427 Datasheet | Richtek

Description The RT9427 Li-Ion/Li-Polymer battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell battery packs. The RT9427 resides within the system's main board and manages a nonremovable battery or removable battery pack. The RT9427 reports State Of Charge, State Of Health, Full Charge Capacity, Time To Empty and Cycle Count based on the Voltaic Gauge with Current Sensing (VGCS) algorithm by using the voltage difference between battery voltage and OCV to calculate the increasing or decreasing SOC, with current sensing pensation to report battery SOC. Voltaic Gauge with Current Sensing algorithm can support smoothly SOC and does not accumulate error with time and current. That is an advantage pared to coulomb counter which suffer from SOC drift caused by current sense error and battery self-discharge. The RT9427 provides plete battery status monitor with interrupt alarm function. It can alert to host processor actively when condition of battery over/undervoltage, over-temperature in charge/ discharge and overcurrent in charge/discharge. Especially for high C-rate battery charging application, it can measure battery voltage by kelvin sense connection to eliminate the IR drop effect for optimal charging profile and safety. More useful alarm functions are Under SOC alert, SOC Change and battery presence status change. Features - Support System Side Fuel Gauging - Battery Fuel Gauge for 1-Series (1s Xp) Li-Ion/Li-Polymer Applications - State of Charge (SOC) Calculated by Voltaic Gauge TM with Current Sensing (VGCS) - No Accumulation Error on Capacity Calculation - Battery SOC, SOH, FCC, TTE and Cycle Count Report - Ultra Low Power Consumption: 5A - Voltage Measurement: ±5m V - Current Measurement: ±0.5% - Battery Temperature Measurement: ±1°C (TA = 0°C to 45°C) - Battery Monitor with Alert Indicator for Voltage, Current, Temperature, SOC and Presence - High C-Rate Battery Charging pliance - Voltage Kelvin-Sense Connection for WDFN Package -...