The TFA9914 is a high-efficiency 10 V boosted class-D haptic Driver IC with a sophisticated smart haptic and LRA protection algorithm. It can deliver up to 5.6 W (AVG) output power into an 8 Ohm LRA, at a battery supply voltage of 4.0 V. The internal boost converter raises the supply voltage to 10 V, providing ample headroom for major improvements in LRA performance of clean haptic effects and audio display features. Unlike competing solutions, the adaptive haptic boost algorithm uses feedback to accurately calculate both the temperature, the excursion, and resonance frequency, allowing the TFA9914 to adapt to changes in the LRA condition and environment. It enables audio display, audio to haptic and short click use cases.

Features:

  • Boost Voltage – 10 V
  • Output power: 5.6 W (RMS) into 8 Ohm at 4.0 V supply voltage (THD = 1 %)
  • I²C-bus control interface (400 kHz)
  • High efficiency and low power dissipation
  • 48KHz sample frequency supported in I2S mode
  • 3-bit clock/word select ratios supported (32x, 48x, 64x) in I2S mode
  • Supporting MCLK from the host
  • Home Button & Robustness (F0) with boost/brake feature
  • Audio to Haptic conversion feature for gaming and media use case of movie/music with protection algorithm
  • Audio display with LRA with protection algorithm and tuning algorithm
  • Low standby current <10µA

The next generation of Haptic technology allows manufacturers to reach the 100% full-screen ratio by removing all physical buttons, including those on the edge.

Applications:

  • Smartphones and Tables/Notebook
  • Gaming devices
  • Home Appliances
Standard Key Features: Boosted voltage, Resonance tone, package
Product Key Features Samples / Mass Production Embedded DSP Memory for On-Chip Effects Temperature & Excursion protection Transducer Characterization & Calibration Audio Streaming Triggering (Latency) Low Standby Current Clocking Scheme
TFA9914 Home Button & Robust F0 tracking Available / Q3 - 2018 Yes - HB1.5 FW on-chip Up to 6 effects Yes At calibration < 2Hz F0 Accuracy Click +
Tone +
TDM
I2C (~2.5ms) 10µA MCLK