Features: • Software Selectable Protection Levels and Variable Protect Detection/Release Times
• Integrated FET Drive Circuitry
• Cell Voltage and Current Monitoring
• 0.5% Accurate Voltage Regulator
• Integrated 4kbit EEPROM
• Flexible Power Management with 1A Sleep Mode
• Cell Balancing ControlPinout
SpecificationsStorage temperature . . . . . . . . . . . . . . . . . . . . . . . . .-55 to 125°C
Operating temperature. . . . . . . . . . . . . . . . . . . . . . . . .-40 to 85°C
DC output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Lead temperature (soldering 10s) . . . . . . . . . . . . . .. . . . . . . 300°C
Power supply voltage, VCC . . . . . . . . . . . . . . .VSS-0.5 to VSS+27.0V
Cell voltage, VCELL. . . . . . . . . . . . . . . . . . . . . . . . . . .. -0.5 to 6.75V
Terminal voltage, VTERM1 (Pins: SCK, SI, SO, CS, AS0, AS1,
AS2, VCS1, VCS2, OVT, UVT, OCT, AO) VSS-0.5 to VRGO + 0.5V
Terminal voltage, VTERM2 (VCELL1) . . . .. . . .VSS-0.5 to VCC + 1.0V
Terminal voltage VTERM3, (all other pins) . . ..VSS-0.5 to VCC + 0.5V
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
DescriptionThe X3102 is a protection and monitor IC for use in battery packs consisting of 3 series Lithium-Ion battery cells. The X3102 provides internal over-charge, over-discharge, and overcurrent protection circuitry, internal EEPROM memory, an internal voltage regulator, and internal drive circuitry for external FET devices that control cell charge, discharge, and cell voltage balancing.
Over-charge, over-discharge, and overcurrent thresholds reside in an internal EEPROM memory register and are selected independently via software using a 3MHz SPI serial interface. Detection and time-out delays can also be individually varied using external capacitors.Using an internal analog multiplexer, the X3102 allows battery parameters such as cell voltage and current (using a sense resistor) to be monitored externally by a separate microcontroller with A/D converter. Software on this microcontroller implements gas gauge and cell balancing functionality in software.
The X3102 contains a current sense amplifier. Selectable gains of 10, 25, 80 and 160 allow an external 10 bit A/D converter to achieve better resolution than a more expensive 14 bit converter.
An internal 4kbit EEPROM memory featuring IDLock™,allows the designer to partition and "lock in" written battery cell/pack data.
The X3102 is housed in a 28 Pin TSSOP package.
X3102 Data Sheet
