TFA9812_2
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
2 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
n
No high system clock required (PLL is able to lock on BCK)
n
No external heat sink required
n
5 V tolerant digital inputs
n
Supports dual coil inductor application
n
Easy application and limited external components required
2.2 DSP features
n
Digital parametric 10-band equalizer
n
Digital volume control per channel
n
Sele24 dB gain boost
n
Analog interface to digital volume control in Legacy mode
n
Digital clip level control
n
Soft and hard mute
n
Thermal foldback threshold temperature control
n
De-emphasis
n
Output power limiting control
n
Polarity switch
n
Four Pulse Width Modulation (PWM) switching frequency settings
2.3 Audio data input interface format support
n
Master or slave Master Clock (MCLK), Bit Clock (BCK) and Word Select (WS) signals
n
Philips I
2
S, standard I
2
S
n
Japanese I
2
S, Most Significant Bit (MSB) justified
n
Sony I
2
S, Least Significant Bit (LSB) justified
n
Sample rates from 8 kHz to 192 kHz
3.
Applications
n
Digital-in Class-D audio amplifier applications
n
CRT and flat-panel television sets
n
Flat-panel monitors
n
Multimedia systems
n
Wireless speakers
n
Docking stations for MP3 players
