Product - Protection ICs
Product - Protection ICs
Part Number Cells Protected Stack Function Protection FETs Protection for Note Package
Over-Voltage Under-Voltage Temperature
NT1777 2/3/4/5-cell (Extra R) - N-MOS +/-25mV +/-80mV V - TSSOP-16L
The NT1777 series are the 2/3/4/5-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 NT1777 series with state-of-the-art design and process.
The NT1777 series have three types of discharge over-current protection and one type of charge over-current protection.
The NT1777 series have three types of over- temperature during charging, over-temperature during discharging and under-temperature during charging protection.
  • High accuracy voltage detection circuit
    • Over-charge detection : ±25mV
    • Over-discharge detection : ±80mV
    • Discharge over-current-1 detection : ±10%
    • Discharge over-current-2 detection : ±10%
    • Load short-circuiting detection : ±10%
    • Charge over-current detection : ±8mV/±10mV
    • Temperature detection : ±4℃
  • High withstand voltage
    • Absolute maximum rating: 30V
    • Operating voltage range: 3.5V to 25V
  • Low power consumption
    • Supply current: 6.6uA max. (Ta=+25℃)
  • Delay times of over-charge, load short-circuiting, charge over-current and over/under temperature are generated by an internal circuit (fixed).
  • Delay times of over-discharge, discharge over-current-1 and -2 are controlled by external capacitors.
  • Built-in breaking wire detector function
  • Package: 16 pin TSSOP
  • Lead-free, Sn 100%, Halogen-free
  • Lithium-ion rechargeable battery pack
  • Lithium-polymer rechargeable battery pack
  • Lithium-iron phosphate rechargeable battery pack