Coreless Current Sensors MRD Series

Magnetic open-type coreless current sensors that output analog voltage proportional to the current value when the current flows to the primary conductor.
They have a built-in high-performance TMR element. Therefore, they can detect both DC and AC at high speed. They also have a built-in disturbing magnetic field fluctuation suppression function.

They can be applied to monitor the amount of solar power generated, the amount of power supplied in battery stations, the amount of charging/discharging of various batteries, and other applications.

Coreless current sensors with a TMR element that uses the latest magnetic sensor technology.
TMR elements are better for responsiveness, temperature changes, and output magnitude than hall elements used in the same magnetic method.
The coreless type is also better for handling and mountability than cored current sensors. This is because it is a small and low-profile surface mounting package.

The value of the magnetic sensor may change in response to a magnetic force other than the target you want to detect. However, these current sensors block the impact of external magnetic fields with the differential method. Accordingly, they have an extremely high malfunction prevention effect.
The power supply voltage is 3.0 V and 5.0 V. We have a lineup of products each for AC/DC and the measurable current width.

Features

• High-speed response Typ 0.5 µsec (bandwidth: 1 MHz)
• High overall accuracy Typ 1.0%
• Differential method for canceling external magnetic fields
• Possible to select the bandwidth with a capacitor
• Analog output
• With thermal shutdown circuit
• Complies with the UL62368-1 safety standards
• SOICW16 package (10.3 × 10.2 × 2.8 mm)
• Power supply voltage: 3.0 V and 5.0 V
• Measurement range: AC (−25 to +25 A or −40 to +40 A) and DC (0 to 25 A or 0 to 40 A)

Applications

• Amount of power generated by solar panels
• Amount of AGV battery remaining
• Amount of charging in charging stations
• Amount of battery remaining in home appliances, tools, electric bicycles, and other products
• Motor control and overcurrent detection

Block Diagram