Features

• AEC-Q100 Grade 2 Qualified
• Scalable Low Power Piezo Controller
  • Designed for TDK PowerHap 120 V Actuator Portfolio
  • Drives up to 4 µF
  • Energy Recovery
  • Small Solution Footprint
• Integrated Digital Front End with SPI
  • 1024-Samples Internal FIFO
  • 2-kB RAM Waveform Memory
  • Waveform Synthesizer
  • 1.8 V to 5.0 V Digital I/O Supply
• Piezo Sensing Interface
• Multi-Actuator Synchronization
• Fast Start-Up Time, < 500 µs
• Connects to 12 V Power Bus
• Offered in a Wettable Flank QFN-24 Package

Product Description

The BOS1211 is a scalable piezo haptic controller based on our patented CapDrive™ technology. It can drive TDK’s PowerHap 120 V piezo actuators or similar loads with up to 120 V HD haptic low distortion waveforms and operates from a 12 V supply voltage. The BOS1211 integrates a digital interface, low-side and high-side NMOS gate drivers for buck-boost conversion and piezo sensing capability.

The BOS1211 plays waveforms through its digital front-end and SPI interface. A flexible deep FIFO interface enables the user to continuously stream the digital waveform data for playback or to transmit burst data. The interface also integrates a waveform synthesizer and 2-kB RAM waveform memory to generate HD haptic waveforms with minimum communication bandwidth enabling two waveform generation modes: RAM playback and RAM synthesis.

The digital front-end gives access to many internal registers to optimize performance. The BOS1211 features a piezo sensing interface that can detect a pressure applied on the piezo actuator, play automatic haptic waveform feedback and notify the host of the event.

The high-speed SPI enables the device to share a common communication bus for multi-actuator system. The pin SYNC synchronizes multiple controllers in the same system to have waveforms phase delay within less than 2 µs.

Safety systems protect the device from damage in case of a fault.