| ROHM Non-contact current sensor BM14270MUV-LB
| Lower current consumption and higher sensitivity than Hall element products
| High sensitivity detection possible without connecting wiring within the current sensor Awareness of energy security is growing worldwide.
Recently, power visualization and safety measures are required for servers and solar power generation systems in data centers that handle large amounts of power. Accordingly, the demand for current sensors is also increasing every year.
In the case of current sensors using existing Hall elements, there were disadvantages such as high current consumption and low sensitivity, which required wiring to be connected within the current sensor.
ROHM BM14270MUV-LB Amidst the increasing need for current sensors that satisfy both small size, low power loss, and high reliability, ROHM announced on the 8th that it has developed a new non-contact current sensor, the 'BM14270MUV-LB'.
ROHM developed the BM14270MUV-LB by combining the MI element development technology of its affiliated company, Aichi Steel, with its own semiconductor production technology and sensor control technology. The MI (Magneto Impedance) element is a device that uses a special amorphous wire and can detect magnetism and magnetic fields.
The BM14270MUV-LB is a sensor for various industrial and consumer devices that detect operating conditions by current, such as data center servers handling high power, solar power generation systems, and battery-powered drones.
Current detection method according to the type of current sensor The new sensor uses a high-sensitivity, low-current MI element, enabling non-contact detection without the need for wiring within the current sensor.
Comparison of power consumption and power loss of current sensors The BM14270MUV-LB, which has achieved a low power consumption of 0.07 mA, which is 1/100 of that of a Hall element in a small size of 3.5 mm × 3.5 mm, is also equipped with an external magnetic field cancellation function for noise, allowing board mounting without shielding measures.
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Principle of external magnetic field cancellation function
Effect of external magnetic field cancellation function Since only the magnetic field from the current that is to be detected can be detected, high-precision measurement can be achieved without a shield.
In addition, the burden on the MCU is reduced by the digital output built into the A/D converter, making it easier to monitor current. The new product makes it easy to detect current in all applications, from industrial equipment handling high power to small battery-operated devices.
BM14270MUV-LB has started sample shipments in February of this year, and mass production is scheduled to begin in July with a monthly production capacity of 100,000 units.
