MAXIM has introduced ICs using ModelGauge, an advanced lithium-ion battery modeling algorithm, that continuously tracks a battery’s relative state of charge (SOC) over a wide range of charge/discharge conditions. The ModelGauge algorithm eliminates the current sense resistor and battery learning cycle required by other fuel gauges. Using the system’s microcontroller, temperature compensation is achieved.
main feature:
The MAX17058/MAX17059 ICs are tiny lithium-ion (Li+) battery fuel gauges in handheld and portable devices. The MAX17058 operates on a single-cell Li+ cell and two Li+ cells in the series MAX17059. With the battery inserted, the IC debounces initial voltage measurements to improve initial SOC estimates and keep them on the system side. SOC and voltage information access using the I2C interface. The IC is available in a tiny 0.9mm x 1.7mm, 8-bump wafer-level package (WLP) or in a 2mm x 2mm 8-pin TDFN package.
Key Features
MAX17058: 1 cell, MAX17059: 2 cell
Accuracy ±7.5mV/Cell voltage measurement
ModelGauge algorithm
Provide accurate country supervisor
Compensates for temperature/load changes
No accumulated error, with coulomb counter
eliminate learning
No current sense resistor required
Low Quiescent Current: 23μA
battery insertion debounce
Best estimated initial SOC for 16 samples
Programmable reset battery swap
2.28V to 3.48V range
Low SOC early warning indicator
I2C interface
Figure 1: 17058 Typical Application Circuit
Program features:
The solution EV kit is powered by a single-cell battery (MAX17058) and can be configured to evaluate a single-cell Li-ion battery (MAX17058) or two Li-ion cells in series (MAX17059).
characteristic
Battery input voltage range
MAX17058: +2.5V to +4.5V
MAX17059: +2.5V to +12V
Powered by a Single-Cell Battery (MAX17058)
Evaluation of a Single-Cell (MAX17058) or 2-Cell (MAX17059) Battery
Voltage measurement accuracy of ±7.5mV per cell
No current sensing required
Onboard LDO for 2-Cell Evaluation (MAX17059)
Software compatible with Windows XP, Windows Vista and Windows 7
operating system
Proven PCB layout
Fully installed and tested
Reference schematic:
Figure 1 Reference schematic
Refer to PCB diagram
Figure 2: Reference component layer, solder layer
For details, see:
http://datasheets.maximintegrated.com/en/ds/MAX17058EVKIT-MAX17059EVKIT_en.pdf
The Links: 3MBI50SX-120 SKKT200/18E