July 30, 2020 – Suzhou Nanochip Microelectronics Co., Ltd. (hereinafter referred to as “Nanochip Microelectronics”), a leading domestic provider of signal chain chips and solutions, announced the launch of the NSi13xx series isolation for current and voltage detection in high-voltage systems Sampling chip. NSi13xx chips have an immunity to common mode transient interference (CMTI) of 150kV/μs, and have good accuracy and compact package design, suitable for industrial applications such as motor drives, photovoltaic inverters, uninterruptible power supplies, and on-board chargers Current and voltage sampling on the high-voltage side in automotive applications such as (OBC), traction inverters, etc.
Hall-based current sensors and shunt-based sampling are commonly used in high-voltage current sensing for industrial and automotive applications. The former has natural isolation characteristics, while the latter requires the addition of isolation op amps or modulators for electrical isolation. In comparison, the sampling scheme based on shunt plus isolated op amp/modulator has higher accuracy and lower nonlinearity, and at the same time, the offset voltage and offset voltage temperature drift are lower, and it is not easily disturbed by external magnetic fields. It is the solution that is easier for engineers to choose.
The NSi13xx series of current sampling chips include reinforced isolation op amps NSi1300, NSi1200 and reinforced isolation sigma-delta modulator NSi1306, which have a differential input structure suitable for the above shunt-based current detection schemes, such as phase current detection. The NSi1311’s high input impedance and 2V linear input range are suitable for voltage detection schemes such as DC bus voltage detection.
Figure: NSi1300 functional block diagram
Nanochip NSi13xx isolated sampling series chips can operate normally in a wide temperature range from -40°C to +125°C, and all series of products are available in SOP8 (300mil) package. In addition, NSi1306 provides SOP16 (300mil) package, NSi1200 provides DUB8 package for customers to choose. On this basis, Nanochip provides flexible packaging customization services to meet the various alternative needs of customers.
With NSi13xx series product features:
·Low offset voltage and temperature drift
Low gain error and its temperature drift
·Low nonlinearity
· CMTI up to 150kV/μs
Internal integrated diagnostic function, providing failsafe output
Wide operating temperature range: -40~125℃
in,
NSi1300 product features:
8.2x gain (250mV input version) or 41x gain (50mV input version)
·Analog differential input, analog differential output
NSi1306 product features:
·Analog differential input, digital bit stream output
·Support 5M~21MHz clock input
NSi1200 product features:
8x gain
·Limited bandwidth to 100kHz
·Analog differential input, analog differential output
NSi1311 product features:
· Up to 1GΩ input impedance
0.1~2V linear input range, gain is 1
·Analog single-ended input, analog differential output
The Links: LQ10D031 NL6448BC33-31
