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Nisshinbo NB7123ZA 1-Cell Li-ion Battery Protection IC

Nisshinbo NB7123ZA 1-Cell Li-ion Battery Protection IC is a compact and efficient protection IC designed for single-cell lithium-ion and lithium-polymer batteries that support high-side FETs. This Nisshinbo IC offers essential safety functions to ensure reliable operation and extended battery life. It integrates overcharge, overdischarge, and overcurrent protection, as well as short-circuit detection, safeguarding the battery against abnormal conditions. The NB7123ZA device features low standby current for improved energy efficiency and includes built-in MOSFET drivers to simplify circuit design and reduce external component requirements. With precise voltage thresholds and a fast response to fault conditions, the NB7123ZA is ideal for portable electronics such as smartphones, wearables, and backup battery packs. A robust design and wide operating temperature range make the IC suitable for applications demanding high reliability and safety.

Features

  • Supply current
    • 10.0µA maximum in normal mode, 7.0µA typical
    • 0.04µA maximum in standby mode
  • Detector selectable range and accuracy
    • 4.3V to 4.7V, ±6.5mV overcharge detection voltage (VDET1)
    • 2.0V to 3.0V, ±17mV over-discharge detection voltage (VDET2)
    • 0.0060V to 0.0400V, ±1.00mV discharge overcurrent detection voltage (VDET3)
    • -0.0060V to -0.0500V, ±1.00mV charge overcurrent detection voltage (VDET4)
    • 0.0200V to 0.1000V, ±1.00mV short circuit detection voltage (VSHORT1)
    • 1.200V to 2.000V, ±20.0mV - 0V battery charging inhibition voltage (VNOCHG)
    • +40°C to +85°C, ±2.0°C overtemperature detection temperature (TDET)
  • Functions
    • Overcharge and over-discharge release - latch
    • Discharge overcurrent release selectable - auto release / latch
    • 0V battery charging - inhibition
    • High temperature protection
    • Forced standby selectable - available / unavailable
    • Forced standby active by STB pin selectable - active-high / active-low
    • Forced standby release (VSTBREL) - VREL3
    • NTC thermistor selectable - 100kΩ / 470kΩ
  • 1.66mm x 1.08mm x 0.38mm, WLCSP-8-ZA2 package

Applications

  • Hearable/wearable devices
  • Smartphones
  • Handheld data terminals

Typical Application Circuit

Application Circuit Diagram - Nisshinbo NB7123ZA 1-Cell Li-ion Battery Protection IC

Block Diagrams

Block Diagram - Nisshinbo NB7123ZA 1-Cell Li-ion Battery Protection IC
Published: 2025-12-29 | Updated: 2026-01-06