Product - Secondary Protection ICs
Product - Secondary Protection ICs
Part Number Cells Protected Stack Function Protection FETs Protection for Note Package
Over-Voltage Under-Voltage Temperature
NT1793 3/4-cell - Fuse +/-25mV - - - NMSOP-8L UMSOP-8L
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. 
*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, UMSOP-8L
*Notebook PCs 
*Portable Instrumentation 
*Medical and Test Equipment