We are seeing touch screen technology used in numerous handheld devices and keyboard interfaces but there is an issue with the haptic technology that drives the touch screens. Typically it suffers slow response times and large battery drains.
I'm sure there are a million application that we haven't thought of yet or which might have previously been unsuitable due to these issues.
The good news is that Fairchild has released a new driver which is now available through Premier Farnell with low standby current and fast wake up.
All we need now is a million bright ideas for how and where to use these.
Features
- High drive-- controls the initial momentum of motor
- Low standby current (<500nA)- helps reduce system power consumption
- Fast wake-up time of <30µS – reduces system latency and provides a fast haptic response
- I2C control – allows for flexible implementation
- PWM input allows a wide range of frequencies to be used for control of ERM motors and LRAs
- Supports both ERM and LRA applications – allows for multiple platform usage
- Thermal Protection shutdown - shuts down the device when thermally overloaded
- Reduces design-in complexity and allows you to get to market faster
Haptic user-interface design
Evaluation kit for Fairchild Semiconductor FAH4830 driver IC, providing prototype board with header pins and interface for connecting haptic motor.