TFA9879 Datasheet, PDF (1/60 Pages) NXP Semiconductors – Mono BTL class-D audio amplifier for portable applications with digital input

TFA9879
Mono BTL class-D audio amplifier for portable applications
with digital input
Rev. 02 — 15 October 2010
Product data sheet
1. Introduction
The TFA9879 is a high-efficiency filter-free mono class-D audio amplifier with two
separate digital inputs for mobile applications.
2. General description
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.
3. Features and benefits
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-bus addresses for multi-channel applications