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NB7401 Series
2 to 4 Serial Cell Li-ion or Li-polymer Battery Protection IC for Secondary Protection

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Description

The NB7401HC is an overcharge protection IC for 2 to 4 serial cell Li-ion or Li-polymer secondary battery.
The NB7401HC provides high-accuracy voltage detection circuits, a delay circuit, and a voltage regulator for an external real-time clock (RTC). It also comes with the shut-down detection circuit that reduces the supply current to a minimum.
Connecting an external PTC thermistor to the CTLC pin enables optional temperature protection.

Spec

Operating Input Voltage 4.0 V to 25 V / Vvc1 + 5 V (Maximum Rating: 32 V)
Number of Cells 2, 3, 4
Supply Current Typ. 1.5 µA (VCELLn = 3.5 V)
Standby Current Max. 0.2 µA
Shutdown Detection Voltage 2.3 / 2.5 / 2.7 / 2.8 V
Overcharge Detection Voltage 3.55 V to 3.85 V, 4.20 V to 4.85 V (0.005 V Steps)
Overcharge Detection Voltage Accuracy ±0.015 V (Ta = 25°C)
±0.020 V (0°C < Ta < 60°C)
Overcharge Detection Delay Time 2-, 4-, or 6-sec
Overcharge Restoration Voltage VDET1n − 0.1 V to VDET1n − 0.4 V (0.050 V Steps)
Conditions for Overcharge Restoration Voltage Release type
Package DFN2020-9-HC
VROUT pin (built-in voltage regulator) output voltage (VVROUT) 1.2 V to 3.3 V (0.1 V Steps)
VROUT pin (built-in voltage regulator) output voltage (VVROUT) accuracy ±2%

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Protections / Functions

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

Functional Description

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

For more details, please refer to "Protecting Li-ion Batteries: Functions and Advantages".

Functional Description

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

For more details, please refer to "Protecting Li-ion Batteries: Functions and Advantages".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Second Protection
Cell 2,3,4
Functions Temperature Protection

Technical Documents

  • Typical Application

    Typical Application

Quality & Packages

Product Name Compatibility Package Marking Reliability
NB7401HCxxxxxE4S
  • gradeConsumer
 DFN2020-9-HC See datasheet NB7401HCS
  • 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.

FAQ

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Buy / Contact

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    Sales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
  • Available from 1 piece!
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NB7401 Series