NXP TFA9879HN/N1,157

The TFA9879 is a high-efficiency filter-free mono class-D audio amplifier with two separate digital inputs for mobile applications. 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. The TFA9879 is available in a HVQFN24 package. The TFA9879 is a high-efficiency mono Bridge Tied Load (BTL) class-D amplifier with digital audio inputs. It supports all commonly used formats.

• Closed loop amplifier for: 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
• Mono BTL class-D audio amplifier with digital input
• 1.8 V/ 3.3 V tolerant digital inputs
• Only three external components required
• 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
• I2S 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

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