TFA9879HN: Mono BTL Class D audio amplifier for portable applications with digital input
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.
sot616-3_3d
3.1 General features
- 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 addresses for multi-channel applications
- 1.8 V / 3.3 V tolerant digital inputs
- Only three external components required
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
Interface format support for digital audio inputs
- I²S formats (fs = 8 kHz to 96 kHz):
Philips standard I²S
Japanese I²S MSB-justified
Sony I²S LSB-justified
- PCM / IOM2 formats (fs = 8 kHz or fs = 16 kHz):
Long frame sync
Short frame sync
Data Sheets (1)
Selector Guides (1)
Package Information (1)
Packing (1)
Ordering Information
| Product | Status | Package version | Package name | Product description | Application | PSRR (dB) | Po (W) | Output configuration | Speaker impedance (BTL / SE) (Ohm) | Input format | VP [min - max] (V) | Class | Power Down | Volume control | Remarks |
|---|
| TFA9879HN/N1 | Active | SOT616-3 | HVQFN24 | Mono 2.75 W in 4 Ohm at 5 V BTL Class-D audio amplifier with digital input and micro DSP | Speaker | 80 | 2.75 | BTL | 4; 8 | I2S; PCM / IOM2 | 2.5 - 5.5 | D | Yes | Via I2C | Micro DSP with 5 band parametric equalizer; DRC; etc. |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|
| TFA9879HN/N1 | | SOT616-3 | | Tray, Bakeable, Multiple | Active | TFA9879HN/N1,157
(9352 864 09157) | Standard Marking | TFA9879HN/N1 |    | Always Pb-free | 1 | 1 |
| Reel 13" Q1/T1 | Active | TFA9879HN/N1,118
(9352 864 09118) | Standard Marking | TFA9879HN/N1 | | Always Pb-free | 1 | 1 |
