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  • MAX17201 Fuel Gauge

  • Created: Dec 27, 2016

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This is a reference design is an evaluation circuit for the MAX17201, an ultra-low power stand-alone fuel gauge ICs used for single-cell applications that implement the Maxim ModelGauge m5 algorithm without requiring host interaction for configuration. The ModelGauge m5 algorithm combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel gauge accuracy.

The MAX17201 automatically compensates for cell aging, temperature, and discharge rate, and provides accurate state of charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions. As the battery approaches the critical region near empty, the ModelGauge m5 algorithm invokes a special error correction mechanism that eliminates any error. The RJ-11 connector provides all signal lines necessary for I2C, SMBus, 1-wire, or 1-wire overdrive communication between the IC and the software GUI interface. The MAX17201 can be configured to use up to two external thermistors RT1 and RT2. If the application requires direct thermal contact to the cells, RT1 and RT2 can be removed and replaced with leaded thermistors connected between the RT1+/RT1- and RT2+/RT2- solder pads. The circuit is equipped with a 0.010Ω chip sense resistor installed. The circuit contains an optional 0.003Ω copper trace sense resistor (R17) that can be enabled if desired. To do so, the chip sense resistor must be replaced with 0Ω jumpers to change the circuit.

The MAX17201 fuel gauge circuit is a very useful nowadays, it indicates the level of power contained in a battery and a lot of devices depend on a battery like smartphones and tablets, digital cameras, handheld computers, and other portable equipment.



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