Allegro MicroSystems ACS3704x Leaded Magnetic Current Sensors
Allegro MicroSystems ACS3704x Leaded Magnetic Current Sensors are a fully integrated Hall-effect-based current sensor ICs that provide a galvanically isolated voltage output proportional to the sensed current. These sensors do not require an external sense resistor, simplifying system design and reducing component count. The ACS37041 and ACS37042 sensors feature an integrated conductor with low resistance for current measurement, reducing power losses and improving efficiency. The ACS37041 and ACS37042 employ a differential sensing technique with two Hall plates to effectively reject common-mode magnetic fields to ensure accurate and reliable current measurements.
The ACS37041 is in a compact SOT23-W package, making it suitable for space-constrained applications. The IC offers a wide sensing range up to 30A and maintains high accuracy over its full operating temperature range. The device's inherent galvanic isolation (functionally isolated for rails to 100V) enhances system safety and simplifies integration by eliminating the need for complex isolation schemes. The ACS37041 is designed for various applications, such as motor control, battery management, and power supplies, where accurate and reliable current sensing is essential.
Features
- Self-contained shuntless current sensing with no requirement for an external sense resistor
- Low ohmic loss with 1.6mΩ conductor resistance on the LH package
- Differential sensing robust against external magnetic fields
- 150kHz analog output for fast response time
- Inherent galvanic isolation:
- 100VRMS functional isolation (ACS37041 only)
- UL certified 285VRMS basic working voltage (ACS37042 only, pending)
- Total error less than ±5% over temperature
- 3.3V and 5V supply voltage options
- Bidirectional current sensing up to 30A
- AEC-Q100 Grade 1, automotive qualified (ACS37041 only, ACS37042 qualification pending)
- Small footprint, SOT23-W 5-pin LH package
Applications
- Industrial motor drivers (<100V)
- Clean energy string inverters (optimizers)
- Clean energy microinverters
- Personal mobility (e-bikes and e-scooters)
Diagram
Evaluation Boards
Allegro MicroSystems Bo mạch đánh giá Bare ACSEVB-LH5
Compatible with the ACS37041 integrated Hall-effect current sensor IC and LH (SOT23-W 5) package.
Mikroe MIKROE-6632 Hall Current 22 Click
Designed for precise and isolated measurement of bidirectional current flow.
Videos
Featured Products
Allegro MicroSystems Current Sensing Alternatives to Shunt Resistors
Magnetic current sensors as an alternative to traditional shunt-based current sensing circuits.