TFA9881/2 3.4 W Audio Amplifiers

Mono, filter-free class-D audio amplifiers in a 9-bump WLCSP from NXP

NXP's TFA9881 and TFA9882 are mono, filter-free class-D audio amplifiers in a 9-bump WLCSP (Wafer Level Chip-Size Package) with a 400 μm pitch.

The digital input interface is an over-sampled Pulse Density Modulated (PDM) bit stream. The TFA9881 receives audio and control settings via this interface. Dedicated silence patterns are used to configure the control settings of the device, such as mute, gain, Pulse Width Modulated (PWM) output slope, clip control, and bandwidth extension (this control mechanism is not required if the default settings are used). The Power-Down to Operating Mode transition is triggered when a clock signal is detected.

The device features low RF susceptibility because it has a digital input interface that is insensitive to clock jitter. The second order closed loop architecture used in the TFA9881 provides excellent audio performance and high supply voltage ripple rejection.

Features Applications
  • Small outline WLCSP9 package
  • High efficiency (90%, 4 Ω/20 μH load) and low power dissipation
  • Current limiting to avoid audio holes
  • Undervoltage and overvoltage protection
  • Three gain settings: -3 dB, 0 dB and +3 dB
  • Only two external components required
  • Mobile phones
  • PDAs
  • Portable gaming devices
  • Portable navigation devices
  • Notebooks/Netbooks
  • MP3 players/Portable media players

TFA9881/2 3.4 W Audio Amplifiers

ImageManufacturer Part NumberDescriptionTypeOutput TypeAvailable Quantity
TFA9882UK/N1,023 datasheet linkIC AMP AUDIO CLASSD 3.4W 9WLCSPTFA9882UK/N1,023IC AMP AUDIO CLASSD 3.4W 9WLCSPClass D1-Channel (Mono)3178 - Immediate
TFA9882UK/N1,023 product page link
TFA9881UK/N1,023 datasheet linkIC AMP AUDIO CLASSD 3.4W 9WLCSPTFA9881UK/N1,023IC AMP AUDIO CLASSD 3.4W 9WLCSPClass D1-Channel (Mono)2322 - Immediate
TFA9881UK/N1,023 product page link
Published: 2013-07-02