NB7130ZA 1-Cell Li-ion Battery Protection IC

Introduction

The Nisshinbo Micro Devices NB7130ZA is a compact battery protection IC designed for single-cell lithium-ion and lithium-polymer battery packs. It helps improve battery safety, reliability, and service life by monitoring important electrical and thermal conditions during charging and discharging.

Part Description

The NB7130ZA is a high-accuracy, one-cell battery protection IC intended for low-side FET configurations. It continuously monitors the battery voltage and current to detect unsafe operating conditions.

Key protection functions include:

• Overcharge detection and protection
• Overdischarge detection and protection
• Overcurrent detection and protection
• Short-circuit protection
• Thermistor-based battery temperature monitoring
• Configurable detection thresholds and timing delays
• Compact WLCSP-8-ZA1 package for space-constrained designs

By controlling external protection MOSFETs, the IC can disconnect the battery from the load or charger when an abnormal condition is detected. This makes it suitable for protected battery packs and compact rechargeable products.

Applications

Potential applications for the NB7130ZA include:

• Single-cell Li-ion battery packs
• Single-cell Li-polymer battery packs
• USB-rechargeable portable devices
• Bluetooth accessories
• Wireless sensors
• Wearable electronics
• Handheld consumer devices
• Portable medical electronics
• Compact tracking devices
• Rechargeable LED products

Industries

The NB7130ZA can be used in several industries, including:

• Consumer electronics
• Wearable technology
• Medical devices
• Industrial sensing and monitoring
• Smart home and IoT products
• Telecommunications accessories
• Personal electronics
• Portable lighting
• Asset tracking and logistics

Usage Ideas

1. Protected Wearable Battery Pack
   Build a compact Li-polymer battery pack for a fitness tracker or smart wristband with voltage, current, short-circuit, and temperature protection.

2. Wireless Sensor Power Module
   Design a rechargeable power module for a remote environmental or industrial sensor using a single Li-ion cell and low-side protection MOSFETs.

3. USB-Rechargeable LED Light
   Create a portable LED flashlight or bicycle safety light with a protected one-cell battery system that prevents excessive discharge and charging faults.

Conclusion

The NB7130ZA is a compact and accurate protection solution for one-cell Li-ion and Li-polymer battery designs. Its support for overcharge, overdischarge, overcurrent, short-circuit, and thermistor-based temperature protection makes it well suited to safety-conscious portable and rechargeable products. Its small WLCSP package also helps designers minimize board space in modern compact electronics.