Ensuring Safety: The Latest in Li-Ion Battery Protection Devices

New Li-Ion Battery Protection ICs Launched by Nisshinbo Micro Devices

Nisshinbo Micro Devices, a Tokyo-based company, has recently introduced the NB7142 and NB7143 series of Li-Ion battery protection ICs. These innovative devices are specifically designed for applications that require high-precision overcurrent and short-circuit detection, such as portable gadgets, smartphones, game consoles, and handheld devices.

The NB7142 and NB7143 series are exceptional protection ICs that are specifically designed for one-cell Li-ion/polymer batteries. They come equipped with standard features such as overcharge/over-discharge voltage and charge/discharge overcurrent detection, which greatly enhance the reliability of the applications they are used in.

One of the standout features of these protection ICs is their wide overcurrent detection range, which allows them to handle any challenging overcurrent event with ease. Additionally, the low standby current ensures extended operating time, even with small capacity batteries. The FET-sense current detection feature guarantees high accuracy in over-current and short-circuit detection, making these ICs an indispensable tool for any battery-powered device.

The NB7142 and NB7143 series are available in small DFN1212-6-GK and DFN1814-6-GN packages, making them convenient to use on small circuit boards or integrate into a laminated battery pack.

Specifications of NB7142 & NB7143:

• Operating Input Voltage: 1.5 V to 5.0 V (Maximum Rating: 12 V)
• Number of Cells: 1
• Supply Current: Typ. 1.5 µA
• Standby Current: Max. 0.04 µA (VDET2: Latch type), Max. 0.50 µA (VDET2: Auto release type)
• Overcharge Detection Voltage: 4.2 V to 4.8 V (5 mV Step)
• Overcharge Detection Voltage Accuracy: ±20 mV
• Overcharge Detection Delay Time: 1024 ms
• Over-discharge Detection Voltage: 2.0 V to 3.0 V (50 mV Step)
• Over-discharge Detection Voltage Accuracy: ±50 mV
• Over-discharge Detection Delay Time: 64 ms, 128 ms
• Discharge Overcurrent Detection Voltage: 0.0150 V to 0.1500 V (0.5 mV Step)
• Discharge Overcurrent Detection Voltage Accuracy: ±3 mV (0.015 V to 0.060 V), ±5% (0.060 V to 0.100 V), ±5 mV (0.100 V to 0.150 V)
• Discharge Overcurrent Detection Delay Time: 12 ms, 128 ms
• Charge Overcurrent Detection Voltage: -0.150 V to -0.020 V (0.5 mV Step)
• Charge Overcurrent Detection Voltage Accuracy: ±3 mV (-0.060 V to -0.020 V), ±5% (-0.100 V to -0.060 V), ±5 mV (-0.150 V to -0.100 V)
• Charge Overcurrent Detection Delay Time: 8 ms, 17 ms
• Short Detection Voltage: 0.060 V to 0.400 V (5 mV Step)
• Short Detection Voltage Accuracy: ±5%
• Short Detection Delay Time: 0.3 ms
• Conditions for Overcharge Restoration: Auto Release / Latch
• Conditions for Over-discharge Restoration: Auto Release / Latch
• 0 V Battery Charging: Permission / Inhibition
• Package NB7142 / NB7143: DFN1212-6-GK / DFN1814-6-GN
• Datasheet: NB7142, NB7143