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Allegro MicroSystems, Inc. (" Allegro "), a leading global provider of power and sensing solutions for motion control and energy efficient systems, today announced the launch of three new solutions aimed at improving performance and optimizing energy efficiency for electric vehicles and industrial automation. The solutions include the ACS37035 and ACS37630 current sensors, as well as the A89347 automotive-grade fan driver chip, providing advanced functionality for multiple application scenarios.

"Our latest motor control and thermal management solutions demonstrate Allegro's ongoing commitment to helping improve efficiency and performance in automotive and industrial applications through innovative technologies." Ram Sathappan, Allegro's vice President of Global Marketing and Applications, said: "The ACS37035 and ACS37630 offer industry-leading precision and noise resistance, enabling precise motor control for demanding applications such as robotics, industrial motors and traction inverters for electric vehicles. The A89347 fan driver chip enables quiet and reliable operation in applications such as electric vehicle seat and battery cooling. We are excited to demonstrate these forward-thinking solutions that will not only simplify design and improve overall system efficiency, but also empower our customers to innovate and create superior value."

ACS37035 Current sensor chip

The Allegro ACS37035 high-precision current sensor chip has a bandwidth of 1 MHz and a typical response time of 0.45 µs for precise measurement of high-frequency currents in fast control loops. Its differential sensing function, combined with a common mode rejection ratio (CMRR) of 4 mA/Gauss, provides high immunity to external magnetic fields, ensuring accurate measurements even in noisy environments. The sensor has a sensitivity error of ±3% over the temperature range and a maximum offset voltage of ±15 mV to minimize error and improve system performance. This high precision and noise resistance enables tighter control loops that increase motor efficiency, reduce power consumption, and enable smoother operation. Target applications include motor control, load detection and management, and switching mode power supplies.

ACS37630 current sensor chip

Designed for U-core current sensing applications such as xEV traction inverters and battery management systems, the ACS37630 offers high bandwidth (up to 250 kHz) and fast analog output, with a typical response time of 1.6 µs. Its vertical Hall technology senses magnetic fields parallel to the packaging surface, making it ideal for system integration with U-shaped magnets. This non-contact, non-invasive current sensing solution eliminates the need for C-magnets, simplifying assembly and reducing system complexity. With a sensitivity of ±0.7% and an offset of ±5 mV, the ACS37630 provides accurate current measurements over the full automotive grade Grade0 operating temperature range of -50 to +150°C. The simplified design and high precision reduce the design and manufacturing complexity of current sensing systems, while reducing costs and improving system reliability.

A89347 Fan driver chip

The Allegro A89347 is an automotive-grade, sensorless sinusoidal three-phase BLDC driver chip for electric vehicle seats and battery cooling fans. It provides integrated closed-loop speed control that minimizes vibration and audible noise. In addition, customizable speed curves that can be configured through EEPROM allow for customized performance in a variety of fan applications. The A89347 has swing rate control, lock detection and low power standby mode with current consumption of only 10 µA. Flexible controls help for quieter, more efficient fan operation, while lower power consumption extends battery life. The AEC-Q100 standard IC ensures reliable operation in the automotive environment.

The ACS37035 and ACS37630 are available now, and the A89347 will be available this summer. All products will come with evaluation boards and comprehensive support resources to assist customers with design and development.

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