Descriptions

NT1742 is an accurate secondary battery protection

IC for 2/3/4-cell Lithium-Lon/Lithium-Polymer battery

packs, on which a precise voltage detection circuit

with a specific reference is embedded.

NT1742 monitors individual cell voltages. If any cell

voltage reaches or goes over the specified voltage

and lasts for a period longer than the delay time set,

NT1742 activates an external MOSFET to blow the

three-terminal protection fuse, permanently disabling

the battery pack.

NT1742 has a CTL pin to control the output voltage of

the CO pin. The CTL pin can also offer an

over-temperature protection via PTC thermistor. If the

thermistor temperature exceeds the over-temperature

threshold and lasts for a period longer than the delay

time, the output pin activates the external MOSFET to

blow external fuse.

Features

? 2-, 3- or 4-Cell Secondary Protection

? High Accuracy Overcharge Voltage:

4.225V to 4.55V ?25mV

? Low Power Consumption:

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

? High Input-Voltage Device

Absolute Maximum Rating: 40V

Operating Voltage range: 4.5V to 26V

? Output Control Function with CTL Pin

? Over Temperature Protection with PTC Thermistor

-Optional

? High Ripple Rejection Ability for Power Supply

? Package: DFN-8L

? Lead-free, Sn 100, Halogen-free

Applications

? Notebook PCs

? Portable Instrumentation

? Medical and Test Equipment