HVAC Systems

Modern climate control systems must deliver personalized comfort silently and efficiently, minimizing their impact on the vehicle's energy budget. Allegro's QuietmotionTM family of motor drivers and sensorless BLDC controllers provides the silent, precise control needed for HVAC blower and flaps. Out proprietary algorithms minimize audible noise and vibration while maximizing motor efficiency. 

The result is a comfortable and quiet cabin environment that enhances the driving experience without significantly reducing the driving range of an electric vehicle. 

HVAC Systems Application Diagram
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    3 Phase BLDC Driver (HVAC Blower)

    A4960 - Automotive Sensorless BLDC Controller with Integrated Gate Drive and Diagnostics

    A4964 - Automotive Sensorless Sinusoidal BLDC Controller with LIN Interface and Diagnostics

    A4911 - Automotive Three-Phase MOSFET Driver with ASIL Compliance, Diagnostics, and Current Sensing

    A4939 - Automotive Three-Phase MOSFET Driver with Integrated Fault Protection and 50V Operation

     

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    Regulator

    APM81911 - 40V, 3A Synchronous Buck Regulator Module with Integrated Inductor and EMI Filter

    APM81803 - 40V, 3A Synchronous Buck Regulator Module with Integrated EMI Filter

    A8586 - Wide Input Voltage, 3.5A Adjustable Buck Regulator with Programmable Frequency

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    Fan Speed Dial Position Sensor

    APS12626 - 2D Hall-Effect Speed and Direction Sensor ICs with Functional Safety

    A31315 - 3D Magnetic Position Sensor

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    Position Sensor (HVAC Blower)

    CT310 - 2D XtremeSense™ TMR Angle Sensor with High Accuracy

    A33230 - 3D Hall-Effect Sensor IC for Angle Measurement

     

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    Full Bridge Gate Driver

    A89500 - 100V Half-Bridge MOSFET Driver for High-Power Inductive Loads

    A89505 - 50V Full-Bridge PWM Gate Drivers with Integrated Current Control and Protection

    A89506 - 50V Full-Bridge PWM Gate Drivers with Integrated Current Control and Protection

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    Current Sensor (Mode Door Actuator)

    ACS71240 - 120 kHz Hall-effect Current Sensor with Overcurrent Fault in SOIC-8 and QFN-12 Packages

    ACS37220 - Low-Resistance Current Sensor IC with Overcurrent Fault Protection

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    Fan Speed Dial Position Sensor

    APS12626 - 2D Hall-Effect Speed and Direction Sensor ICs with Functional Safety

    A31315 - 3D Magnetic Position Sensor

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    Stepper Motor Driver

    A4992 - Automotive Microstepping Stepper Driver with Integrated Current Control

    A4980 - Programmable Stepper Driver with SPI Control

    AMT49700 - Automotive Stepper Motor Driver with Programmable Motion Control and Integrated Current Sensing

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    Current Sensors

    ACS71240 - 120 kHz Hall-effect Current Sensor with Overcurrent Fault in SOIC-8 and QFN-12 Packages

    ACS37220 - Low-Resistance Current Sensor IC with Overcurrent Fault Protection

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    Current Sensors

    ACS37041 - Integrated Hall-Effect Current Sensors in a Compact SOT23-W Package

    ACS37042 - Integrated Hall-Effect Current Sensors in a Compact SOT23-W Package

    ACS71240 - 120 kHz Hall-effect Current Sensor with Overcurrent Fault in SOIC-8 and QFN-12 Packages

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    Current Sensors

    ACS37041 - Integrated Hall-Effect Current Sensors in a Compact SOT23-W Package

    ACS37042 - Integrated Hall-Effect Current Sensors in a Compact SOT23-W Package

    ACS71240 - 120 kHz Hall-effect Current Sensor with Overcurrent Fault in SOIC-8 and QFN-12 Packages

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    Full Bridge Gate Driver

    A3922 - Automotive Full-Bridge MOSFET Driver with SPI Control and Diagnostics

    A3924 - Automotive Full-Bridge MOSFET Driver with SPI Control, Current Sensing, and Diagnostics

    A89500 - 100V Half-Bridge MOSFET Driver for High-Power Inductive Loads

    A89505 - 50V Full-Bridge PWM Gate Drivers with Integrated Current Control and Protection

    A89506 - 50V Full-Bridge PWM Gate Drivers with Integrated Current Control and Protection

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    Temperature Dial Position Sensor

    APS12626 - 2D Hall-Effect Speed and Direction Sensor ICs with Functional Safety

    A31315 - 3D Magnetic Position Sensor

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    Blend Door Position Sensor

    APS12626 - 2D Hall-Effect Speed and Direction Sensor ICs with Functional Safety

    A31315 - 3D Magnetic Position Sensor

    A33230 - 3D Hall-Effect Sensor IC for Angle Measurement

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    Current Sensors

    ACS71240 - 120 kHz Hall-effect Current Sensor with Overcurrent Fault in SOIC-8 and QFN-12 Packages

    ACS37220 - Low-Resistance Current Sensor IC with Overcurrent Fault Protection

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Featured Products

Allegro EX 12 Package

ACS71240

Automotive-Grade, Galvanically Isolated Current Sensor IC
A4955, A4956, A5957 Full Bridge PWM Driver Gate and Gate Driver Packaging Image

A4955

Designed for pulse-width-modulated (PWM) control of DC motors, the A4955 is capable of 50 V operation and provides gate drive for an all n-channel external MOSFET bridge.
APS122x5 Product Image

APS12205, APS12215, APS12235

High-Temperature Hall-Effect Latches for Low-Voltage Automotive Applications
A8660

A8660

Wide Input Voltage, Adjustable Output, Synchronous Buck Controller with PWM Frequency Dithering, Synchronization, and NPOR

Documentation & Resources

Precision in Motion: Advanced Sensing for Industrial Control
Blog

Precision in Motion: Advanced Sensing for Industrial Control

Explore how the world of industrial automation, precision and reliability are not just goals; they are absolute necessities. Whether it's a multi-axis robotic arm, a smart valve, or a complex human-machine interface (HMI), the ability to accurately and dependably track motion and position is critical.
Efficient Climate Control, Engineered to Perfection - Driving Performance and Sustainability in Next-Generation Heat Pumps and HVAC Systems
Brochure

Efficient Climate Control, Engineered to Perfection - Driving Performance and Sustainability in Next-Generation Heat Pumps and HVAC Systems New

The global push toward energy - efficient buildings and electrified heating is accelerating innovation in heat pump and HVAC system design. Consumers and regulators alike demand systems that deliver precise climate control, ultra quiet operation, and maximum seasonal efficiency without compromising increasingly compact form factors.

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