MAX17049 Datasheet | Maxim Integrated

EVALUATION KIT AVAILABLE MAX17048 / MAX17049 Micropower 1-Cell/2-Cell Li+ Model Gauge ICs General Description The MAX17048/MAX17049 ICs are tiny, micropower current fuel gauges for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17048 operates with a single lithium cell and the MAX17049 with two lithium cells in series. The ICs use the sophisticated Li+ battery-modeling algorithm Model Gauge K to track the battery relative state-of-charge (SOC) continuously over widely varying charge and discharge conditions. The Model Gauge algorithm eliminates current-sense resistor and battery-learn cycles required in traditional fuel gauges. Temperature pensation is implemented using the system microcontroller. The ICs automatically detect when the battery enters a low-current state and enters low-power 4FA hibernate mode, while still providing accurate fuel gauging. The ICs automatically exit hibernate mode when the system returns to active state. On battery insertion, the ICs debounce initial voltage measurements to improve the initial SOC estimate, thus allowing them to be located on system side. SOC, voltage, and rate information is accessed using the I2C interface. The ICs are available in a tiny 0.9mm x 1.7mm, 8-bump wafer-level package (WLP), or a 2mm x 2mm, 8-pin TDFN package. Applications Wireless Handsets Smartphones/PDAs Tablets and Handheld puters Portable Game Players e-Readers Digital Still and Video Cameras Portable Medical Equipment Ordering Information appears at end of data sheet. Features and Benefits S MAX17048: 1 Cell, MAX17049: 2 Cells S Precision ±7.5m­V/Cell Voltage Measurement S Model Gauge Algorithm - Provides Accurate State-of-Charge - pensates for Temperature/Load Variation - Does Not Accumulate Errors, Unlike Coulomb Counters - Eliminates Learning - Eliminates Current-Sense Resistor S Ultra-Low Quiescent Current - 4µA Hibernate, 23µA Active - Fuel Gauges in Hibernate Mode - Automatically Enters and...