The function of a current sense amplifier is simple: it produces a voltage proportional to the current on the device’s input. An external or internal precision resistor can be used to measure current in these systems.
These are essentially op-amp circuits that take a voltage measurement as an input and use feedback to amplify the output. A conventional high-speed interface can be used to programme some current sense amplifiers.
The gain of the output can be adjusted with another device, such as an MCU, rather than modifying a PWM signal. These devices can also be used to regulate power without the usage of a traditional regulator IC.
The North America Current Sense Amplifiers Market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2026, registering a CAGR of XX% from 2022 to 2027.
Texas Instruments’ INA223 programmable gain current sense amplifier accepts up to 26 V input and has a programmable SPI interface. For high-side current detection, this gadget requires a 3.3 V input with an external sense resistor.
It’s important to note that the high-side resistor should be chosen so that the input voltage exceeds the 10-20 mV maximum offset voltage (depending on the output gain). Silicon Labs, a leading developer of mixed-signal isolation technology for industrial automation and Internet infrastructure, has released an isolated current sense amplifier with the largest bandwidth and lowest signal delay in the industry.
Industrial motor drives, solar inverters, high-voltage power converters, uninterruptible power supplies (UPS), and electric/hybrid-electric vehicle (EV/HEV) systems can all benefit from Silicon Labs’ new Si8920 isolated amplifier.
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