Features
• Software selectable overcurrent protection levels and
variable protect detection times
- 4 discharge overcurrent thresholds
- 4 short circuit thresholds
- 4 charge overcurrent thresholds
- 8 overcurrent delay times (Charge)
- 8 overcurrent delay times (Discharge)
- 2 short circuit delay times (Discharge)
• Automatic FET turn-off and cell balance disable on reaching
external (battery) or internal (IC) temperature limit.
• Automatic override of cell balance on reaching internal
(IC) temperature limit.
• Fast short circuit pack shutdown
• Can use current sense resistor, FET rDS(ON), or Sense
FET for overcurrent detection.
• Four battery backed software controlled flags.
• Allows three different FET controls:
- Back-to-back N-Channel FETs for charge and discharge
control
- Single N-Channel discharge FET.
- Single N-Channel FET for discharge, with separate,
optional (smaller) back-to-back N-channel FETs for
charge.
• Integrated Charge/Discharge FET Drive Circuitry with
200μA (typ) turn-on current and 150mA (typ) Discharge
FET turn-off current.
• 10% Accurate 3.3V voltage regulator (minimum 25mA out
with external NPN transistor having current gain of 70).
• Monitored cell voltage output stable in 100μs.
• Internal Cell balancing FETs handle up to 200mA of
balancing current for each cell (with the number of cells
being balanced limited by the maximum package power
dissipation of 400mW).
• Simple I2
C host interface
• Sleep operation with programmable negative edge or
positive edge wake-up.
• <10μA Sleep Mode
• Pb-free (RoHS compliant)