Silicon Labs Announces Isolated Current Sense Amplifiers with Reliable Isolation, the Industry's Hig

Recently, silicon labs (NASDAQ: slab) announced the launch of an isolated current sensing amplifier with reliable isolation, the highest bandwidth in the industry and the lowest signal transmission delay. Silicon Labs' new si8920 isolation amplifier provides an ideal current shunt measurement solution for power control systems operating in harsh environments, including industrial motor drive, solar inverter, high voltage power converter, uninterruptible power supply (UPS) and electric / hybrid vehicle (EV / HEV) systems.

For all high-power systems and power converters with high-voltage circuits, fast and accurate current sensing is the key. The current measurement of high-voltage line (up to 1200V) through electrically isolated amplifier can provide key information for low-voltage controller and improve system response time and efficiency. The si8920 isolation amplifier provides a differential low-voltage input connected to the current shunt resistor, enabling the controller to accurately measure the current on the high-voltage line while maintaining optimal electrical isolation. Si8920 device has industry-leading signal bandwidth (up to 750khz), which can ensure fast and accurate DC current measurement and accurate presentation of main signal and harmonic signal.

Si8920 isolation amplifier adopts silicon labs proven CMOS based isolation technology, which can meet the strict requirements of UL, VDE, CQC and CSA standards, support the maximum 5kV isolation withstand capacity and 1200V working voltage, and can provide a wider working temperature range, better noise suppression and longer service life than competitors' isolation technology. Very low temperature drift of si8920 amplifier (1 μ V / ° C) to ensure stable performance under various operating conditions.

Si8920 provides robust and reliable isolation amplifier solutions for products requiring long service life, such as industrial automation, green energy and Internet infrastructure equipment. Many power systems have long-term service life guarantees and are expected to operate on site for 25 years or more. In many power systems, isolation usually becomes the first point of failure and limits the service life of the equipment. The traditional isolator based on optocoupler technology is vulnerable to temperature changes, and its performance will be reduced in the external environment. In contrast, CMOS based isolation components such as si8920 isolation amplifier can work normally in all industrial temperature ranges and can support product service life of up to 100 years.

The si8920 isolation amplifier provides extremely fast response time, and only a very small 0.75 is required for signal transmission through the isolation gate μ S transmission delay, which allows the power control system to respond quickly to transient load conditions. Ultra low signal transmission delay enables the control loop to respond quickly, so as to obtain a more effective and stable system, and the controller can take rapid action to maintain the expected performance. Low signal transmission delay also enables the power supply system to quickly correct abnormal and potential dangerous events, which helps to reduce the cost of equipment maintenance.

Ross sabolcik, vice president and general manager of access and isolation products at silicon labs, "Silicon labs designed si8920 isolated analog amplifier to meet the requirements of power conversion system with high-voltage bus for operating conditions, reliability and long service life. The high bandwidth and extremely low signal transmission delay of si8920 device make it the best isolated electric influenza solution for motor drive system, solar inverter, power converter and increasingly popular EV / HEV vehicles Solution. "

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