NXP Semiconductors TFA9812 - Manual (Page 2)

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
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No high system clock required (PLL is able to lock on BCK)
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No external heat sink required
■ 5 V tolerant digital inputs
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Supports dual coil inductor application
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Easy application and limited external components required
2.2 DSP features
■ Digital parametric 10-band equalizer
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Digital volume control per channel
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Selectable +24 dB gain boost
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Analog interface to digital volume control in Legacy mode
■ Digital clip level control
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Soft and hard mute
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Thermal foldback threshold temperature control
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De-emphasis
■ Output power limiting control
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Polarity switch
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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
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Philips I 2 S, standard I 2 S
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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
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Digital-in Class-D audio amplifier applications
■ CRT and flat-panel television sets
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Flat-panel monitors
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Multimedia systems
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Wireless speakers
■ Docking stations for MP3 players