Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver is a high-efficiency controller driver for piezo haptic actuators. The driver is optimized for driving up to 2µF piezo elements. It can generate a single-ended haptic waveform of up to 110VPK-PK amplitude from a 2.8V to 5.5V input power supply or a single-cell Li+ battery. Memory playback and haptic waveforms in real-time streaming modes are supported.
Features
- 110VPK-PK haptic waveforms generation
- Optimized for up to 2µF haptic piezo actuator
- 2.8V to 5.5V input supply range
- 600μs start-up time to haptic playback
- High-efficiency, low IQ extends battery life
- 75μA standby current/1μA shutdown current
- Maxim patented ultra-low-power boost architecture
- 12-bit haptic waveform playback DAC
- Real-time streaming and RAM playback modes
- 9k FIFO buffer with FIFO ready status signal
- 8k RAM buffer for waveforms storage
- 25MHz SPI interface
- SPI ready, warning and fault conditions interrupt
- Protection features
- Programmable cycle-by-cycle overcurrent limit, 130V overvoltage, UVLO, and thermal protection
- Small size and low profile
- 2.42mm x 2.02mm, 30 bump WLP
Application Circuit
