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 ModelGauge™ to track the battery relative state-of-charge (SOC) continuously over widely varying charge and discharge conditions. The ModelGauge algorithm eliminates current-sense resistor and battery-learn cycles required in traditional fuel gauges. Temperature compensation is implemented using the system microcontroller.
The ICs automatically detect when the battery enters a low-current state and switches into a low-power 3µA 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 × 1.7mm, 8-bump wafer-level package (WLP), or a 2mm × 2mm, 8-pin TDFN package.
|Part Number||Functions||Battery Type||Interface||Parameters Measured||Fuel Gauge Algorithm||Applications||VSUPPLY|
|MAX17048||Fuel Gauge||1 Cell Li-Ion||2-Wire|
|-40 to +85||$1.09 @1k|
|MAX17049||2 Cell Li-Ion|
|See All Battery Fuel Gauges, Protectors, and Monitors (51)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C|
|Evaluation Board||7783||MAX17048XEVKIT Evaluation Kits for the MAX17048X and MAX17049X|
|Evaluation Board||7783||MAX17049XEVKIT Evaluation Kits for the MAX17048X and MAX17049X|
|Evaluation Board||7782||MAX17049EVKIT Evaluation Kits for the MAX17048 and MAX17049|
|Evaluation Board||7782||MAX17048EVKIT Evaluation Kits for the MAX17048 and MAX17049|