Description

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 overtemperature during charging, over-temperature

during discharging and under-temperature during

charging protection.

Features

 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

Applications

 Lithium-ion rechargeable battery pack

 Lithium-polymer rechargeable battery pack

 Lithium-iron phosphate rechargeable battery pack