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Last Updated: Apr 25, 2025 | Study Period: 2024-2030
Automotive current sense amplifiers are used to measure the current flowing through a circuit in a car. They are used in a variety of applications, including battery management, motor control, and fuel injection.
Automotive current sense amplifiers must be able to withstand the harsh environment of a car, including high temperatures, vibration, and electromagnetic interference. They must also be accurate and reliable.
There are a number of different types of automotive current sense amplifiers available, each with its own advantages and disadvantages. Some of the most common types include:
Instrumentation amplifiers: These are general-purpose amplifiers that can be used for a variety of applications, including current sense. They are typically accurate and reliable, but they can be expensive.
Optocoupler amplifiers: These amplifiers use an optocoupler to isolate the input from the output. This makes them immune to electromagnetic interference, but they can be less accurate than other types of amplifiers.
Hall effect amplifiers: These amplifiers use a Hall effect sensor to measure the current. They are very accurate and reliable, but they can be expensive.The best type of automotive current sense amplifier for a particular application depends on the specific requirements of the application.
For example, if accuracy is the most important factor, then a Hall effect amplifier may be the best choice. However, if cost is a major concern, then an optocoupler amplifier may be a better option.
When choosing an automotive current sense amplifier, it is important to consider the following factors:The range of currents that need to be measuredThe accuracy requiredThe environmental conditions that the amplifier will be exposed toThe cost of the amplifierBy considering these factors, you can select the best automotive current sense amplifier for application.
The Global Automotive Current Sense Amplifiers Market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
ROHM has recently developed space-saving, high-accuracy current sensing amplifier integrated circuits (BD1421x-LA series) for industrial applications such as wireless base stations, PLCs, and inverters, as well as consumer applications such as household appliances.
For some years, the need for current sensing has been expanding in a variety of applications. High precision current sensing, for example, is necessary to increase motor rotation efficiency and identify problems.
Simultaneously, a reduced mounting space is required. Conventional setups (operational amplifier discrete components) suffer issues such as degradation of current sensing accuracy owing to component precision and temperature characteristics. It is also difficult to maintain the mounting area as compact as possible.
In response, ROHM used its capabilities in analogue technology to create a new generation of current sensing devices.The BD14210G-LA includes all necessary peripheral components. By connecting a shunt resistor and a bypass capacitor, it may simplify current sensing.
When compared to typical setups (operational amplifier + discrete components), this reduces the number of components from eleven to only three. It also reduces the mounting space by (SSOP6 packaging).
Furthermore, across the full temperature range, a highly accurate current detection has been obtained. Even when an external RC filter circuit for noise reduction is introduced, the internal circuitry keeps the current detection accuracy from decreasing.
This reduces the amount of design man-hours required. The BD14210G-LA's wide input voltage range (-0.2V to +26V) makes it appropriate for current sensing applications that use a 12V/24V power supply.
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