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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
■ No high system clock required (PLL is able to lock on BCK)
■ No external heat sink required
■ 5 V tolerant digital inputs
■ Supports dual coil inductor application
■ Easy application and limited external components required
2.2 DSP features
■ Digital parametric 10-band equalizer
■ Digital volume control per channel
■ Selectable +24 dB gain boost
■ Analog interface to digital volume control in Legacy mode
■ Digital clip level control
■ Soft and hard mute
■ Thermal foldback threshold temperature control
■ De-emphasis
■ Output power limiting control
■ Polarity switch
■ Four Pulse Width Modulation (PWM) switching frequency settings
2.3 Audio data input interface format support
■ Master or slave Master Clock (MCLK), Bit Clock (BCK) and Word Select (WS) signals
■ Philips I
2
S, standard I
2
S
■ Japanese I
2
S, Most Significant Bit (MSB) justified
■ Sony I
2
S, Least Significant Bit (LSB) justified
■ Sample rates from 8 kHz to 192 kHz
3. Applications
■ Digital-in Class-D audio amplifier applications
■ CRT and flat-panel television sets
■ Flat-panel monitors
■ Multimedia systems
■ Wireless speakers
■ Docking stations for MP3 players