TFA9914 SDS High Efficiency Class-D Amplifier for Haptic Rev. 1 16 May 2019 Product data sheet 1 General description The TFA9914 is a high efficiency 10 V boosted class-D haptic driver. It can deliver up to 5.6 W (AVG) output power into an 8 load and up to 1.5 W (AVG) output power into 32 load, at a battery supply voltage of 4.0 V. The internal adaptive DC-to-DC converter raises the power supply voltage up to 10 V, providing strong and sharp haptic feedbacks. Internal adaptive DC-to-DC conversion boosts the supply rail to provide additional headroom and output power. The supply voltage is only raised when necessary. It maximizes the output power of the class-D amplifier while limiting quiescent power consumption. The device can be configured to drive from 8 up to 32 load, allowing it to be embedded in a wide variety of haptic platforms. The TFA9914 also incorporates battery protection. By limiting the supply current when the battery voltage is low, it prevents the haptic system from drawing excessive load currents from the battery, which could cause a system undervoltage. This circuitry minimizes the impact of a falling battery voltage by preventing unexpected device switch off / shutdowns due to excessive current drawn from the battery. The device features a second order closed loop architecture, used in a class-D amplifier, providing an excellent signal performance and high supply voltage ripple rejection. The 2 data input interface is TDM and the control settings are communicated via an I C-bus interface. The TFA9914 is available in a 48-bump wafer level chip-size package (WLCSP) with a 400 m pitch.NXP Semiconductors TFA9914 SDS High Efficiency Class-D Amplifier for Haptic 2 Features and benefits Fully integrated solution that includes class-D amplifier, DC-to-DC, voltage sensing and current sensing, and advanced haptic algorithms running on an on-chip 24-bit 100 MHz dual-MAC DSP. 2 Very competitive PCB footprint (< 16 mm ). 100 % compatible with Android haptic/vibration APIs Automatic transducer diagnosis and calibration at production line without human engagement. Run-time transducer model (f0) tracking after production. Run-time transducer distortion and temperature control. On-chip autonomous boot-up vibration playback. On-chip resonant drive signal (buzz/tone) generation with boosting and braking. On-chip click effect (for virtual buttons, etc.) via wave table playback. 2 Real-time playback for haptic effect streams (I S/TDM). Audio display support (voice call without receiver speaker. Using LRA in place of the speaker) for intelligible speech playback. Embedded sequencer (NXP Semiconductors driver support), to enable complex haptic sequences. Audio-to-Haptics total solution for gaming experience enhancement with major SOC platforms. Supports size-limited low impedance transducers down to 8 . Battery protection with minimal risk of black-out. Audio grade drive signal generation without hearable noise. Automatic power state management. High output power: 5.6 W (AVG) to 8 at 4.0 V supply voltage (THD = 1 % V = 10 V). BST Supports 8 to 32 load configurations. High efficiency, low power dissipation, and low noise haptic driver (dynamic range > 110 dB). Adaptive DC-to-DC converter which, when switching between fixed boost and adaptive boost mode, increases the supply voltage smoothly, preventing large battery supply spikes and limiting quiescent power consumption. Wide supply voltage range (fully operational from 2.7 V to 5.5 V). Very low noise output (typ: 14 V with null DATA input at f = 48 kHz). s 2 I C-bus control interface (400 kHz). Haptic current and voltage monitoring. 48 kHz dedicated sample frequency Configurable full duplex 4-wire TDM input interface. Programmable interrupt control via a dedicated interrupt pin. Thermal foldback and overtemperature protection. 15 kV system-level ESD protection without external components on amplifier output. TFA9914 SDS All information provided in this document is subject to legal disclaimers. NXP B.V. 2019. All rights reserved. Product data sheet Rev. 1 16 May 2019 2 / 37