Product - Protection ICs
Product - Protection ICs
Part Number Cells Protected Stack Function Protection FETs Protection for Note Package
Over-Voltage Under-Voltage Temperature
NT1674 8~20-cell

(Extra R)

V N-MOS +/-25mV +/-50mV V - LQFP-80L
The NT1672/NT1673/NT1674 series are the 4~20-cell protection IC with temperature protection for lithium-ion /lithium-polymer /lithium-iron phosphate rechargeable battery pack. The high accuracy voltage, current detector and delay time circuits are built in NT1672/NT1673/NT1674 series with state-of-the-art design and process.
The NT1672/NT1673/NT1674 series have three types of discharge overcurrent protection and one type of charge overcurrent protection.

The NT1672/NT1673/NT1674 series have three types of over- temperature during charging, over-temperature during discharging and under-temperature during charging protection.
  • High accuracy voltage detection circuit
    • Overcharge detection : ±25mV
    • Over-discharge detection : ±50mV
    • Discharge overcurrent-1 detection : ±10%
    • Discharge overcurrent-2 detection : ±10%
    • Load short-circuiting detection : ±10%
    • Charge overcurrent detection : ±8mV/±10mV
    • Temperature detection : ±3℃/±4℃
  • Low power consumption
    • Supply current: 6.6uA max. (Ta=+25℃)
  • Delay times of overcharge, load short-circuiting, charge overcurrent and over/under-temperature are generated by an internal circuit (fixed).
  • Delay times of over-discharge, discharge overcurrent-1 and -2 are controlled by external capacitors.
  • 0V battery charge available or unavailable function
  • Built-in breaking wire detector function
  • Package: 48 pin LQFP、64 pin LQFP、80 pin LQFP
  • Lead-free, Sn 100%, Halogen-free
  • Lithium-ion rechargeable battery pack
  • Lithium-polymer rechargeable battery pack
  • Lithium-iron phosphate rechargeable battery pack