Descriptions

NT1793 is an accurate secondary battery protection

IC for 3/4-cell Lithium-Ion/Lithium-Polymer battery

packs, on which a precise voltage detection circuit

with a specific reference is embedded.

NT1793 monitors individual cell voltages. If any cell

voltage reaches or goes over the specified voltage for

a period longer than the delay time set, NT1793

activates an external MOSFET to blow the

three-terminal protection fuse, permanently disabling

the battery pack.

For the delay time control, NT1793 provides a built-in

internal delay circuit (1.8sec) and an external

capacitor whichever will be activated according to the

situation.

Features

 Secondary Protection for 3- or 4-Cell

 High Accuracy Over Charge Sense Voltage:  25mV

 Programmable Delay Time, or Optional Internal

Delay Time (1.8sec typically)

 High Input-Voltage Device

Absolute Maximum Rating: 40V

Operating Voltage Range: 5.5V to 26V

 Low Power Consumption:

At 3.5V for each cell: 3.3μA max. (+25℃)

Package: NMSOP-8L

Applications

 Notebook PCs

 Portable Instrumentation

 Medical and Test Equipment