NXP Semiconductors
UM10340_5
TFA9879 demonstration PCB
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 05 — 30 aug. 2011
4 of 20
The necessary information is given for a quick start-up of the demonstration PCB (see
paragraph 2). Paragraph 3 shows the results of the audio characterization and the
schematic, BOM and layout is provided in paragraph 4, 5 and 6.
The TFA9879 device has the following functions / features:
General
•
Wide supply voltage range 2.5V…5.5V
•
Two digital inputs (I2S and PCM/IOM2 formats, 1.8V and 3.3V tolerant) which
are less sensitive to external RF fields
•
Internal Phase-Locked Loop (PLL) requiring no system clock
•
High efficiency of 92% and low power consumption
•
Closed loop amplifier resulting in excellent audio performance:
•
PSRR = -76 dB
•
S/N = -95dB (A-weighted)
•
THD+N = 0.015% at 100mW
RMS
•
High power capability:
•
2.7 W
RMS
in 4
Ω
BTL at 5V
•
1.6 W
RMS
in 8
Ω
BTL at 5V
•
Protections including diagnostic via I2C
•
I2S and PCM/IOM2 input protections
•
Under Frequency Protection (UFP)
•
Over Frequency Protection (OFP)
•
Invalid Bit clock Protection (IBP)
•
Over Current Protection (OCP)
•
Over Temperature Protection (OTP)
•
HVQFN24 package
DSP
•
Volume control (-70dB to +24dB)
•
5-band parametric equalizer
•
Dynamic Range Compression
•
Bass-treble control (-18dB to +18dB)
•
High-pass filter
•
Power limiter (0dB to –124dB)
•
Zero crossing detect
