Mono BTL Class-D Audio Amplifier - TFA9879
Mono BTL Class-D Audio Amplifier - TFA9879 Mono BTL Class-D Audio Amplifier - TFA9879
$ 7.29

The TFA9879 contains a processor that supports a range of sound processing features including a 5-band parametric equalizer, separate bass and treble control, a dynamic range compressor, soft clip control and volume control. Excellent audio performance combined with high Power Supply Rejection Ratio (PSRR) is achieved through the use of a closed loop configuration.

Two independent digital audio inputs (I2S-bus / PCM / IOM2) are available for connecting both a baseband and a multimedia processor.

Features:

  • „High power supply rejection ratio ‹
  • Excellent audio performance „
  • Digital input for high RF immunity „
  • High efficiency for maximizing battery life „
  • Wide supply voltage range (fully operational from 2.5 V to 5.5 V) „
  • Delivers high output power into 4 Ω and 8 Ω load impedances „
  • Phase-Locked Loop (PLL); no system clock required „
  • Protection including diagnostics via I2C-bus: ‹
  • OverCurrent Protection (OCP) to protect against short circuits across the speaker, to the supply line or to ground ‹
  • OverTemperature Protection (OTP) ‹
  • Digital inputs protected with UnderFrequency Protection (UFP), OverFrequency Protection (OFP) and Invalid Bit-clock Protection (IBP) „
  • ‘Pop noise’ free at power-up/power down, during sample rate switching and when switching between digital inputs „
  • Four separate I2C-bus addresses for multi-channel applications„
  • 1.8 V / 3.3 V tolerant digital inputs „
  • Only three external components required 3.2 Programmable Digital Sound Processor (DSP) „
  • Digital volume control (−70 dB to +24 dB) „
  • Digital parametric 5-band equalizer „
  • Bass and treble control (−18 dB to +18 dB) „
  • Dynamic range compressor: ‹
  • Programmable attack and release levels ‹
  • Programmable attack and release rates „
  • Soft and hard mute control „
  • Programmable DC blocking via high-pass filter „
  • Power limiter (0 dB to −124 dB in 0.5 dB steps) „
  • Zero crossing volume control „
  • Stereo-to-mono down-mix function 3.3
  • Interface format support for digital audio inputs „
  • I 2S formats (fs = 8 kHz to 96 kHz): ‹
  • Philips standard I2S-bus ‹
  • Japanese I2S-bus MSB-justified ‹
  • Sony I2S-bus LSB-justified „
  • PCM / IOM2 formats (fs = 8 kHz or fs = 16 kHz): ‹
  • Long frame sync ‹
  • Short frame sync

Applications:

  • „ Mobile phones „ 
  • Portable Navigation Devices (PND) „ 
  • PDAs „ 
  • Notebooks „ 
  • Portable gaming devices „ 
  • MP3 and MP4 players

Datasheet

Schematic

PCB Layout

Mechanical