The UGN3175UA is a Hall-effect sensor IC manufactured by Allegro MicroSystems. It is designed for proximity sensing, switching, and magnetic actuation applications. This unipolar Hall-effect switch features an integrated Hall element combined with advanced temperature compensation to minimize the effects of process and temperature variations on the operate and release points. This results in stable and reliable operation over a wide temperature range.

Applications

• Brushless DC motor commutation
• Revolution counting
• Speed sensing
• Proximity detection
• Contactless switching

Features

• Unipolar Hall-effect switch
• Solid-state reliability
• Low switchpoint drift over temperature
• High magnetic sensitivity
• Reverse battery protection
• Operation from unregulated supply

Benefits

• Improved system reliability due to solid-state switching.
• Stable performance across a wide temperature range.
• Easy integration into various applications due to high sensitivity.
• Protection against damage from incorrect power supply connections.
• Flexibility in power supply design.

Additional Details

The UGN3175UA is a unipolar switch, requiring only one magnetic pole (typically south) to operate. When a magnetic field of sufficient strength is present, the switch activates, and when the field is removed, the switch deactivates. It operates from an unregulated supply, typically between 4.5V and 24V, and provides a digital output. The output switches to a low state when a magnetic field is detected. It is commonly available in through-hole packages for ease of mounting. The UGN3175UA offers a cost-effective and reliable solution for various sensing applications requiring a simple on/off switching action in response to a magnetic field.