NB7120 Series

1-cell Li-ion Battery Protection IC for High-side FETS

Download Datasheet

Description

The NB7120ZA is one-cell Li-ion/Li-polymer rechargeable battery protection IC features highaccuracy over-charge/discharge, overcurrent and temperature protections for external high-side FETs and a sense resistor.

The NB7120ZA can detect over-charge/discharge and load overcurrent, further includes a short circuit protector for preventing large external short circuit current. It is possible to detect the temperature by connecting a thermistor.

Spec

Operating Input Voltage	1.5 V to 5.0 V (Maximum Rating: 6.5 V)
Number of Cells	1
Supply Current	Typ. 5.0 µA
Standby Current	Max. 0.04 µA
Overcharge Detection Voltage	4.2 V to 4.6 V (0.005 V Step)
Overcharge Detection Voltage Accuracy	±10 mV
Overcharge Detection Delay Time	1024 ms, 2048 ms, 3072 ms, 4096 ms
Overdischarge Detection Voltage	2.0 V to 3.4 V (0.005 V Step)
Overdischarge Detection Voltage Accuracy	±35 mV
Overdischarge Detection Delay Time	16 ms, 32 ms, 128 ms
Discharge Overcurrent Detection Voltage	0.0080 V to 0.0800 V (0.0001 V Step)
Discharge Overcurrent Detection Voltage Accuracy	±1.5 mV (0.0080 V to 0.0300 V), ±5 % (0.0301V to 0.0600 V), ±3 mV (0.0601V to 0.0800 V)
Discharge Overcurrent Detection Delay Time	32 ms, 128 ms, 256 ms, 512 ms, 1024 ms,
Charge Overcurrent Detection Voltage	-0.0800 V to -0.0080 V (0.0001 V Step)
Charge Overcurrent Detection Voltage Accuracy	±3 mV (-0.0800V to -0.0601 V), ±5 % (-0.0600V to -0.0326 V), ±1.5 mV (-0.0325 V to -0.0080 V)
Charge Overcurrent Detection Delay Time	8 ms, 16 ms, 16.5 ms, 32 ms
Short Detection Voltage	0.025 V to 0.125 V (0.001 V Step)
Short Detection Voltage Accuracy	±2.5 mV
Short Detection Delay Time	0.28 ms
Conditions for Overdischarge Restoration	Latch
Package	WLCSP-8-P15
0 V Battery Charging	Inhibition

Download Datasheet

Temperature Protection	Reset	Alarm	Cell Balance	Cascadable	Open Wire Detection	Wakeup	Short-circuit Current Detection	Delay Time Shortening

Functional Description

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
NB7120ZAxxxxxE2S		WLCSP-8-P15	See datasheet	NB7120ZAS

Refer to the datasheets for the details on the product.
The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

Temperature Protection	Temperature Protection
Reset	Reset Function
Alarm	Alarm Function
Cell Balance	Cell Balance Function
Cascadable	Cascade Connect Function
Open Wire Detection	Open Wire Detect Function
Wakeup	Wakeup Function
Short-circuit Current Detection	Short-circuit Current Protection
Delay Time Shorting	Output Delay Time Short Function