tfa9812 NXP Semiconductors, tfa9812 Datasheet
tfa9812
Manufacturer Part Number
tfa9812
Description
Btl Stereo Class-d Audio Ampli?er With I 2s Input
Manufacturer
NXP Semiconductors
Datasheet
1.TFA9812.pdf
(66 pages)
1. General description
2. Features
2.1 General features
The TFA9812 is a high-efficiency Bridge Tied Load (BTL) stereo Class-D audio amplifier
with a digital I
paddle. The exposed die paddle technology enhances the thermal and electrical
performances of the device.
The TFA9812 features digital sound processing and audio power amplification. It supports
I
because the key features are controlled by hardware pin connections.
A continuous time output power of 2
an external heat sink. Due to the implementation of a programmable thermal foldback
even for high supply voltages, higher ambient temperatures, and/or lower load
impedances, the device operates without sound interrupting behavior.
TFA9812 is designed in such a way that it starts up easily (no special power-up sequence
required). It features various soft and hard impact protection mechanisms to ensure an
application that is both user friendly and robust.
A modulation technique is applied for the TFA9812, which supports common mode choke
approach (1 common mode choke only per BTL amplifier stage). This minimizes the
number of external components.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
2
C control mode and Legacy mode. In Legacy mode I
TFA9812
BTL stereo Class-D audio amplifier with I
Rev. 02 — 22 January 2009
3.3 V and 8 V to 20 V external power supply
High efficiency and low power dissipation
Speaker outputs fully short circuit proof across load, to supply lines and ground
Pop noise free at power-up/power-down and sample rate switching
Low power Sleep mode
Overvoltage and undervoltage protection on the 8 V to 20 V power supply
Undervoltage protection on the 3.3 V power supply
Overcurrent protection (no audible interruptions)
Overdissipation protection
Thermally protected and programmable thermal foldback
Clock error protection
I
Four different I
Internal Phase-Locked Loop (PLL) without using external components
2
C mode control or Legacy mode (i.e. no I
2
S audio input. It is available in a HVQFN48 package with exposed die
2
C addresses supported
12 W (R
2
L
C) control
= 8 , V
2
C involvement is not needed
DDP
2
= 15 V) is supported without
S input
Preliminary data sheet
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