The DA7280 is a new Haptic Driver Integrated Circuit (IC) capable of driving both ERM (Eccentric Rotating Mass) and LRA (Linear Resonant Actuators) motors, offering High Definition (HD) Wideband Drive, 76% lower idle power consumption and a 50% reduction in external BOM (Bill of Materials) count compared to existing solutions on the market.
As haptic drivers spend the majority of their time in standby/idle mode, the DA7280 was designed to utilize low idle current consumption (360 nA) to maximize battery life. Multiple general purpose inputs allow low latency triggering of haptic sequences, making it a candidate for Android systems incorporating a sensor hub and application processor.
With the DA7280, the application processor can remain in deep sleep while the sensor hub triggers up to six haptic events directly. Then, in active mode, the application processor can trigger or stream complex sequences using I2C. Dialog’s unique and patented constant current output technology continuously monitors the BEMF (Back Electro-Motive Force) from the LRA, allowing the device to have constant awareness of the LRA resonant frequency providing a more responsive, consistent output force, compared to other solutions across temperature, age, mechanical coupling and LRA transducer mechanical variation.
The device combines custom drive sequences at up to 1 kHz for HD haptic effects, along with resonant frequency tracking for driving both LRA and ERM motors. This yields superior click/vibration effects in smartphone, automotive human interface systems, gaming and wearable applications, in addition to similar applications in the industrial space such as touchscreens, VR systems and personal medical devices.
Said Udo Kratz, Senior Vice President and GM, Mobile Systems Business Group of Dialog Semiconductor, “Touchscreens have become a necessity, both in the consumer and increasingly in the automotive market, and this device will help provide a superior user experience that meets increasing demands across these applications.”
The DA7280 is available now in both a 12-ball, 1.5×1.5-mm by 0.6-mm WLCSP package and a 12-pin QFN package.
Dialog Semiconductor plc, 675 Campbell Technology Pkwy, Campbell, CA 95008, (408) 374-4200, https://www.dialog-semiconductor.com/