This reference design uses Hall-effect sensors to implement a trigger that outputs varying voltage based on how far the trigger is pressed. These types of triggers are useful in cordless power tools or any other end equipment that uses trigger displacement information.
The design uses a contactless approach that reduces wear and tear compared to traditional mechanical-based triggers, thereby improving product lifetime. Low-power Hall-effect switches are used along with a load switch to keep the system in a low-power standby mode when the trigger is not pressed. In addition, an optional magnetic field protection feature is available that disables the voltage output when a strong, external magnetic field is present.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Download ready-to-use system files to speed your design process.
Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Contactless, Hall-Effect Variable-Speed Trigger Ref. Des. W/ External Field Prot | PDF | HTML | Dec. 17, 2021 |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.