Allegro MicroSystems Products

Allegro offers a comprehensive portfolio of Hall-effect current sensors: 1) Isolated current sensors (ACS series) - provide galvanic isolation up to 4.8kV with integrated current-carrying conductor, ideal for high-voltage applications; 2) Non-isolated current sensors - for low-voltage applications where isolation is not required; 3) High-bandwidth sensors - up to 1MHz bandwidth for AC current monitoring and fast fault detection; 4) High-precision sensors - ±1% accuracy for metering and monitoring applications; 5) Digital output sensors - I2C/SPI interface for microcontroller integration; 6) Automotive-grade sensors - AEC-Q100 qualified for -40°C to 150°C operation. Current ranges span from ±2.5A to ±200A, with various package options including SOIC-8, QFN, and custom packages for busbar mounting.

Browse our Current Sensors category to find isolated, non-isolated, high-bandwidth, and automotive-grade options.

Selecting the right Allegro motor driver depends on your motor type and application requirements: 1) Motor type - BLDC (A4931, AMT49105), stepper (A4988, DRV8825), or brushed DC (A4950); 2) Power level - integrated drivers for < 500W, pre-drivers with external MOSFETs for higher power; 3) Control interface - parallel, PWM, or SPI/I2C control; 4) Sensor requirements - sensorless BLDC control available, or Hall sensor inputs; 5) Protection features - overcurrent, thermal, undervoltage protection; 6) Automotive qualification - AEC-Q100 options for vehicle applications; 7) Advanced features - FOC, sinusoidal commutation, speed control loops. For automotive fuel pumps and fans, the AMT49105 is ideal. For industrial stepper applications, consider the A4988 or DRV8825.

Use our Motor Driver selection guide or contact our FAE team with your motor type, power level, and control requirements.

Allegro employs multiple magnetic sensing technologies: 1) Hall-effect sensors - measure magnetic flux density perpendicular to chip surface, mature technology with excellent reliability; 2) TMR (Tunnel Magnetoresistance) sensors - higher sensitivity and lower power than Hall-effect, ideal for precision applications; 3) Vertical Hall technology - measure in-plane magnetic fields for 2D/3D sensing; 4) CVH (Circular Vertical Hall) - proprietary technology for high-resolution angle sensing. Sensor types include: linear position sensors (A1324), angle sensors (A1335, AAS33001), speed sensors (ATS series), and 3D magnetic sensors (A31301). Applications range from throttle position sensing to motor commutation and gear tooth detection.

Use Hall-effect for general applications; TMR for high-sensitivity requirements; angle sensors for rotary position measurement.

Isolated current sensors (ACS series) provide galvanic isolation between the current-carrying conductor and sensor circuitry: Advantages - safe high-voltage measurement (up to 4.8kV isolation), no external isolation needed, compact integrated solution. Use for: high-voltage power supplies, motor drives, solar inverters, EV battery management. Non-isolated current sensors measure current without galvanic isolation: Advantages - lower cost, smaller size, lower power consumption. Use for: low-voltage applications (< 60V), battery-powered devices, cost-sensitive consumer products. Key selection criteria: Working voltage - use isolated if > 60V; Safety requirements - isolated for touch-safe designs; Cost - non-isolated for budget-sensitive applications. Allegro's isolated sensors integrate the current conductor, providing the simplest solution for high-voltage applications.

Use isolated sensors for high-voltage (> 60V) applications; use non-isolated for low-voltage, cost-sensitive designs.

Yes, Allegro provides comprehensive evaluation tools: 1) Evaluation boards - dedicated PCBs for each product family with test points and connectors; 2) Demo software - GUI applications for sensor configuration and data visualization; 3) Reference designs - complete system designs for typical applications; 4) Application software - motor control firmware, sensor calibration tools; 5) Simulation models - SPICE models for circuit simulation; 6) Magnetic design tools - calculators for magnet selection and placement. Evaluation boards include: ACS evaluation kits for current sensors, motor driver demo boards with motors, LED driver evaluation systems. BeiLuo Electronics stocks popular evaluation boards and can order specific kits for your evaluation needs. Contact our FAE team for evaluation support and application guidance.

Contact BeiLuo for evaluation board availability; request demo software and reference designs from our FAE team.