Stock Code: 603160

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中文
 Haptic Drivers

TFA9914: High-Efficiency Class-D Amplifier for Haptic

Overview

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 Ohms at 4.0 V supply voltage (THD = 1 %)

  • I²C-bus control interface (400 kHz)

  • High-efficiency and low-power dissipation

  • 48 kHz 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<10 µA

System Block Diagram

Application Block Diagram

DataSheet

Title

ID

Version

Date

  • TFA9914_SDS_Rev.2.0 DS-VHD-00001-EN Rev.2.0 2020-01-21 PDF

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