资 源 简 介
The X3100 is a protecTIon and monitor IC for use in batterypacks consisTIng of 4 series Lithium-Ion battery cells. TheX3101 is designed to work in 3-cell applicaTIons. Both devicesprovide internal over-charge, over-discharge, and overcurrentprotecTIon circuitry, internal EEPROM memory, aninternal voltage regulator, and internal drive circuitry forexternal FET devices that control cell charge, discharge, andcell voltage balancing.Over-charge, over-discharge, and over-current thresholdsreside in an internal EEPROM memory register and areselected independently via software using a 3MHz SPI serialinterface. Detection and time-out delays can also be individuallyvaried using external capacitors.Using an internal analog multiplexer, the X3100 or X3101allow battery parameters such as cell voltage and current(using a sense resistor) to be monitored externally by aseparate microcontroller with A/D converter. Software on thismicrocontroller implements gas gauge and cell balancingfunctionality in software.The X3100 and X3101 contain a current sense amplifier.Selectable gains of 10, 25, 80 and 160 allow an external10-bit A/D converter to achieve better resolution than a moreexpensive 14-bit converter.An internal 4k-bit EEPROM memory featuring IDLock™allows the designer to partition and “lock in” written batterycell/pack data.The X3100 and X3101 are each housed in a 28 Ld TSSOPpackage.
