The MAX17058/MAX17059 ICs are tiny fuel gauges for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17058G+ operates with a single Li+ cell and the MAX17059 with two Li+ cells in series.
The ICs use the sophisticated Li+ battery-modeling algorithm ModelGauge to track the battery relative state-of-charge (SOC) continuously over a widely varying charge/discharge conditions. The ModelGauge algorithm eliminates current-sense resistor and battery-learn cycles required by other fuel gauges. Temperature compensation is implemented using the system micro-controller.
On battery insertion, the ICs debounce initial voltage measurements to improve the initial SOC estimate, allowing them to be located on system side. SOC and voltage 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 × 2mm, 8-pin TDFN package.
Feature
- MAX17058: 1 Cell, MAX17059: 2 Cells
- Precision ±7.5mV/Cell Voltage Measurement
- ModelGauge Algorithm
- Provides Accurate State-of-Charge
- Compensates for Temperature/Load Variation
- Does Not Accumulate Errors, Unlike Coulomb Counters
- Eliminates Learning
- Eliminates Current-Sense Resistor
- Low Quiescent Current: 23μA
- Battery-Insertion Debounce
- Best of 16 Samples Estimates Initial SOC
- Programmable Reset for Battery Swap
- 2.28V to 3.48V Range
- Low SOC Alert Indicator
- I2C Interface
Applications
- Digital Still, Video, and Action Cameras
- Handheld Computers and Terminals
- Health and Fitness Monitors
- Medical Devices
- Smartphones, Tablets
- Wireless Speakers
