FTM / Power & Power Management / Nisshinbo Micro Devices — NJU7890 High-Voltage Monitoring IC

Nisshinbo Micro Devices — NJU7890 High-Voltage Monitoring IC

Power & Power Management

January 6, 2022
Power & Power Management
Issue 1 2022

Nisshinbo Micro Devices NJU7890 High-Voltage Monitoring IC

Monitoring IC saves space in high-voltage inverter and battery circuits

The NJU7890 from Nisshinbo Micro Devices is a power-measurement IC which can monitor a voltage of up to 1,000 V dc. Housed in a unique package which maintains a long creepage distance and features integrated sense resistors, the NJU7890 helps power-system designers to reduce the size of the monitoring circuit in high-voltage circuits by up to 90% compared to discrete solutions.

This monitoring chip achieves high performance, offering precise gain without the need for adjustment.

The NJU7890 is ideal for applications including battery voltage monitoring and monitoring the supply voltage of inverters in electric vehicles, solar energy systems and industrial applications.

The NJU7890YPM is supplied in a PMAP11 package measuring 8.1 mm × 8.1 mm × 1.8 mm.

Features

+1,000 V common-mode input voltage
±1,000 V differential input voltage
±1％ attenuation rate between -40°C and 125°C
30 MΩ minimum input resistance
Supply-voltage range: 2.2 V to 5.5 V
Operating-temperature range: -40°C to 125°C

Applications

Electric and plug-in hybrid electric vehicles
Solar power generation
Battery back-up systems

As of January 2022, the company formerly known as New Japan Radio Co., Ltd is now Nisshinbo Micro Devices Inc. This is the result of an integration with Ricoh Electronic Devices Co., Ltd, a sister company.