Allegro’s 400 kHz ACS37002 series sensors
2024-03-28
Allegro’s 400 kHz ACS37002 series sensors can maintain a lower temperature under high workloads, offering compact, low-power packaging that can reduce temperature and extend the lifespan of power systems. These current sensors achieve an excellent balance between high speed, high precision, and temperature stability, making switch-mode power supply designs more environmentally friendly and efficient, thus leading power technology, and even the world, towards a more sustainable future.
ACS37002 is a 400 kHz fully integrated Hall-effect current sensor with very high accuracy, making it highly suitable for more demanding power conversion control circuits. The magnetic field generated by the current passing through the internal conductor is coupled to the Hall sensor IC, but since there is no physical connection between the current conductor and the IC, high-voltage isolation is achieved. The current is sensed differentially by two Hall elements, eliminating external common-mode magnetic field interference. The sensor is factory calibrated, providing high accuracy across its entire working range without the need for customer programming.
The sensor has an analog output and a reference output, maintaining signal integrity in noisy environments. Additionally, it includes a fast overcurrent fault output, with a user-configurable threshold via the analog input pin, offering short-circuit detection and enhanced system protection. The same sensor device has two logic inputs, providing four user-selectable gain options without the need for additional components. This offers designers higher flexibility, enabling systems that require different current sensing ranges to minimize the overall bill of materials.
ACS37002 is available in three different SOICW-16 packages:
The LA package is optimized for higher sensitivity and lower noise;
The MA package offers 4.8 kVrms of high isolation;
The MC package is our latest version, featuring 0.27mΩ conductor resistance and 5 kVrms of high isolation rating, suitable for applications requiring ultra-low power loss and enhanced isolation.
