Shanghai, China, April 8, 2025- Global renowned semiconductor manufacturer ROHM (headquartered in Kyoto, Japan) announced today the launch of high-precision current sensing amplifiers "BD1423xFVJ-C" and "BD1422xG-C" that comply with the AEC-Q100 * 1 automotive standard. The BD1423xFVJ-C, packaged in TSSOP-B8J, supports an input voltage of+80V and is suitable for high-voltage environments such as DC-DC converters, redundant power supplies, auxiliary batteries, and electric compressors driven by 48V power sources. According to its gain setting, it can be divided into three models: BD14230FVJ-C, BD14231FVJ-C, and BD14232FVJ-C. The "BD1422xG-C" with a small SSOP6 package supports an input voltage of+40V, making it very suitable for space saving design of in vehicle devices such as current monitoring and protection (overcurrent detection) in 5V/12V drive power networks in vehicle bodies and drive control units. According to its gain setting, it can be divided into three models: "BD14220G-C", "BD14221G-C", and "BD14222G-C".

Current detection amplifier is an amplifier used to indirectly measure circuit current. Its function is to amplify the small voltage drop generated by the shunt resistor * 2 and convert it into a measurable voltage signal, suitable for system control and monitoring applications.

The new product integrates the previous operational amplifier circuit with discrete components, saving more space. Current detection can be performed simply by connecting shunt resistors. In addition, the new product adopts a two-stage amplifier structure, with the input stage using a chopper amplifier * 3 and the rear stage using a self stabilizing zero amplifier * 4. By matching resistors that determine the gain accuracy inside the IC, not only can the influence of temperature changes be suppressed, but also high-precision and stable current detection of ± 1% can be achieved.

In addition, even with an external RC filter circuit for noise suppression, the new product can maintain current detection accuracy, which helps reduce design time. Not only that, it also has a negative voltage tolerance of up to -14V, supporting reverse voltage, reverse connection, and negative voltage input. The product lineup also includes products with an+80V input voltage, supporting 48V power supplies for applications such as electric vehicles (xEVs), which can meet the diverse needs of in vehicle applications.

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

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