Nisshinbo Micro Devices NB7143

The NB7143 series Li-Ion battery protection IC is intended for applications requiring high-precision overcurrent and short-circuit detection, such as portable gadgets, smartphones, game consoles and handheld devices. The NB7143 is an exceptional protection ICs designed for one-cell Li-ion/polymer batteries. They are equipped with standard features such as overcharge/over-discharge voltage and charge/discharge overcurrent detection, which makes the application highly reliable. With a wide overcurrent detection range, the protection IC can handle any challenging overcurrent event with ease. The low standby current provides extended operating time even with small capacity batteries. The FET-sense current detection guarantees high accuracy in over-current and short-circuit detection, making it an indispensable tool for any battery-powered device. The NB7143 is available in small DFN1814-6-GN package and therefore convenient to use on small circuit boards or can be integrated into a laminated battery pack.

Key features

• Operating input voltage: 1.5 V to 5.0 V (maximum rating: 12 V)
• 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

Applications

• Game consoles
• Wearable devices
• Smart phone
• Tablet PC