Description

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.

Features

 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

Applications

 Lithium-ion rechargeable battery pack

 Lithium-polymer rechargeable battery pack

 Lithium-iron phosphate rechargeable battery pack