The MAX17040/MAX17041 are ultra-compact, low-cost, host-side fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17040 is configured to operate with a single lithium cell and the MAX17041 is configured for a dual-cell 2S pack.
The MAX17040/MAX17041 use a sophisticated Li+ battery-modelling scheme, called ModelGauge™ to track the battery's relative state-of-charge (SOC) continuously over a widely varying charge/discharge profile. Unlike traditional fuel gauges, the ModelGauge algorithm eliminates the need for battery relearn cycles and an external current-sense resistor. Temperature compensation is possible in the application with minimal interaction between a µC and the device.
Key Features
• Host-Side or Battery-Side Fuel Gauging
– 1 Cell (MAX17040)
– 2 Cell (MAX17041)
• Precision Voltage Measurement
– ±12.5mV Accuracy to 5.00V (MAX17040)
– ±30mV Accuracy to 10.00V (MAX17041)
• Accurate Relative Capacity (RSOC) Calculated
from ModelGauge Algorithm
• No Offset Accumulation on Measurement
• No Full-to-Empty Battery Relearning Necessary
• No Sense Resistor Required
• 2-Wire Interface
• Low Power Consumption
• Tiny, Lead-Free, 8-Pin, 2mm x 3mm
TDFN Package.
Read more at ... Maxim