DS2764K Maxim Integrated, DS2764K Datasheet - Page 10

• Manufacturer Part Number: DS2764K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2764r

DS2764EVKIT+
The Sense Resistor Select sub-tab allows the user to correct the current measurements if a different value
of sense resistor is used. All DS2764s with an integrated sense resistor use 25ms. If the sense resistor is
located externally, the user should select the external resistor radio button on this tab, then enter the value
of the resistor in ms in the Sense Resistor Value field and then click the Write Sense Resistor button.
The Find Sense Resistor button opens the Find Sense Resistor window. The user can then determine the
resistance by forcing a known current and measuring the voltage drop with the DS2764. The resistance
value is stored with ¼ m resolution into the user EEPROM of the device. The program uses this value
to convert the voltage difference from the VSENS+ and VSENS- pins into milliamps. If this value does
not match the value of the external resistor, current measurements will be inaccurate.
The Battery Data and Fuel Gauging Data sub-tabs demonstrate how the pack manufacturer can use the
DS2764s EEPROM fields to store relevant pack information such as assembly date, chemistry, etc… The
fuel gauging characterization data is used by the fuel gauging algorithms in the software. See the Fuel
Gauging Tab description below. Clicking on the Load Default Pack Info button will enter example data
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