Allegro MicroSystems, Inc. ("Allegro"), a global leader in motion control, energy-efficient power solutions, and sensing technologies, today introduced three new solutions designed to boost performance and energy efficiency in electric vehicles and industrial automation. These include the ACS37035 and ACS37630 current sensors, along with the A89347 automotive-grade fan driver IC, bringing advanced capabilities to a wide range of applications.

“Our latest motor control and thermal management solutions underscore Allegro’s unwavering commitment to enhancing efficiency and performance in automotive and industrial applications through cutting-edge technology,” said Ram Sathappan, Vice President of Global Marketing and Applications at Allegro. “The ACS37035 and ACS37630 offer industry-leading accuracy and noise immunity, enabling precise motor control in demanding applications such as robotics, industrial motors, and electric vehicle traction inverters. The A89347 fan driver IC ensures silent and reliable operation in applications like electric vehicle seat and battery cooling. We are thrilled to present these forward-thinking solutions that simplify design, enhance system efficiency, and empower customers to innovate and create exceptional value.”

ACS37035 Current Sensor IC

The Allegro ACS37035 high-accuracy current sensor IC boasts a 1 MHz bandwidth and a typical response time of 0.45 μs, facilitating precise measurement of high-frequency currents in fast control loops. Its differential sensing, coupled with a common-mode rejection ratio (CMRR) of 4 mA/Gauss, offers high immunity to external magnetic fields, ensuring accurate measurements even in noisy environments. The sensor features ±3% sensitivity error and ±15 mV maximum offset voltage across the temperature range, minimizing errors and enhancing system performance. This high accuracy and noise immunity enable tighter control loops, resulting in improved motor efficiency, reduced power consumption, and smoother operation. Target applications include motor control, load detection and management, and switch-mode power supplies.

ACS37630 Current Sensor IC

The ACS37630 is tailored for U-core current sensing applications, such as xEV traction inverters and battery management systems, offering a high bandwidth of up to 250 kHz and a fast analog output with a typical response time of 1.6 μs. Its vertical Hall technology senses magnetic fields parallel to the package surface, making it ideal for system integration with U-shaped magnets. This non-contact, non-intrusive current sensing solution eliminates the need for C-shaped magnets, simplifying assembly and reducing system complexity. The ACS37630 provides ±0.7% sensitivity and ±5 mV offset, delivering accurate current measurements across the full automotive-grade Grade 0 operating temperature range of -50 to +150°C. The simplified design and high accuracy reduce the design and manufacturing complexity of current sensing systems, lowering costs and improving system reliability.

A89347 Fan Driver IC

The Allegro A89347 is an automotive-grade, sensorless sinusoidal three-phase BLDC driver IC designed for electric vehicle seat and battery cooling fans. It offers integrated closed-loop speed control to minimize vibration and audible noise. Additionally, customizable speed profiles configurable via EEPROM allow for tailored performance in various fan applications. The A89347 features slew rate control, lock detection, and a low-power standby mode with a current consumption of just 10 μA. The flexible control enables quieter, more efficient fan operation, while the lower power consumption extends battery life. This AEC-Q100-qualified IC ensures reliable operation in automotive environments.

The ACS37035 and ACS37630 are available now, with the A89347 expected to be available this summer. All products will be supported by evaluation boards and comprehensive support resources to aid customers in design and development.

For more information on Allegro’s latest motor control and thermal management solutions, visit ACS37035, ACS37630, and A89347.

About Allegro MicroSystems

Allegro MicroSystems, Inc. leverages over three decades of expertise in magnetic sensing and power ICs to drive advancements in automotive, clean energy, and industrial automation through solutions that enhance efficiency, performance, and sustainability. Allegro’s commitment to quality drives transformation across industries, solidifying its position as a pioneer in 'automotive-grade' technology and a trusted partner in customer success. For more information, visit https://www.allegromicro.com/en/.