Haptic feedback actuator offers high force density in a compact size

Vishay Intertechnology offers a new AEC-Q200 qualified customisable haptic feedback actuator offering 12V operation for LCDs, touchscreens, and touch switches in automotive applications. Featuring a compact, two-piece construction with mounting holes for easy installation and direct application of force, the Vishay Custom Magnetics IHPT-1411AF-ABA delivers high pulse and vibration capability for clear tactile feedback in noisy environments.

The Automotive Grade IHPT-1411AF-ABA is an electromagnetic device that converts electrical energy into a mechanical pulse or vibration for touch-based interaction that can be controlled by varying the input voltage amplitude and duty cycle. When energised by a DC voltage pulse, the haptic coil assembly produces a magnetic field that attracts the mounted dynamic core piece. When de-energised, it returns the core piece back to its original position by springs or elastic material in the customer's assembly.

The device's fast response time of <5ms can be employed to produce multiple HD haptic effects with operating voltages up to 16V. With an operating temperature range to +105C, the actuator is excellent for rugged environments. The device will be employed in automotive dashboards, centre consoles, and touchscreens for HMIs. It can deliver tactile feedback for electronic shift transmissions, seats, steering wheels, and other in-vehicle controls.

The IHPT-1411AF-ABA's simple bobbin and core components enable designers to layout a return spring configuration that can be integrated into the display mounting, eradicating the requirement for extra housing. Also, the device's low 12V operation eradicates the necessity for the extra high voltage supplies needed by other technologies. As a result, the actuator can be implemented at up to a 40% lower cost while lowering component height and providing higher force density than competing technologies, including linear resonant, linear wideband, eccentric rotating mass, and piezo actuators.

The device can drive a 0.5kg load to 6g of acceleration with a 12V, 5ms pulse; competing technologies can only drive 0.1kg to 0.2kg to this level. The driving coil has an inductance of 1.8mH, typical DCR of 0.95-Ohm, and a coil to core dielectric withstand voltage of 150VDC. RoHS-compliant, halogen-free, and Vishay Green, the actuator offers standard lead terminations dipped in 100 % tin solder. The company can customise the device's mounting orientation, termination types, and performance to any design specifications.