TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 10

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TFA9812HN

Manufacturer Part Number
TFA9812HN
Description
BTL stereo Class-D audio amplifier with I2S input
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
NXP Semiconductors
TFA9812_2
Preliminary data sheet
8.2.3 I
Table 5.
[1]
[2]
The I
The I
Pin:
POWERUP ENABLE
0
1
1
1
1
1
2
S master/slave modes and MCLK/BCK clock modes
In Soft mute mode the I
– In Legacy control mode the analog input pin AVOL controls Soft mute mode.
– In I
In Hard mute mode the PWM controller is overruled with a 50 % duty cycle square
pulse. The Hard mute mode is only available in I
In Operating mode the TFA9812 amplifies the I
actual control setting.
In 3-state mode the output stages are switched off.
Fault mode is entered when a fault condition is detected by one or more of the
protection mechanisms implemented in the TFA9812. In Fault mode the actual device
configuration depends on the fault detected: see
Fault mode is for a subset of the faults flagged on the DIAG output pin. When the
DIAG pin is flagged the output stages will be forced to enter 3-state mode. In Sleep
mode the DIAG pin will not flag fault modes.
Clocking faults do not trigger DIAG output.
Under these conditions soft mute still has to be enabled by the appropriate I
In I
circuit which uses an external crystal. The BCK, WS and MCLK signals are generated
by the TFA9812. On the MCLK pin the TFA9812 delivers a master clock running at the
crystal frequency.
In I
– The external MCLK signal on the MCLK pin called MCLK clock mode.
– The I
In I
In legacy control mode by selecting the right setting on the SDA/MS pin.
2
2
S interface can be set in master or in slave.
S master or slave mode can be selected:
function. See also
2
2
2
S master mode the PLL locks to the output signal of the internal crystal oscillator
S slave mode the PLL can lock to:
C control mode by selecting the right I
2
Operational mode selection
C control mode I
2
-
-
1
1
0
1
S input BCK signal on the BCK pin called BCK clock mode.
Rev. 02 — 22 January 2009
CSEL
-
-
1
0
-
-
Section
2
2
C control can be used to enable an automatic soft mute
S input signal is overruled with a soft mute.
8.5.3.
AVOL
-
-
-
< 0.8 V
-
-
BTL stereo Class-D audio amplifier with I
DIAG Output
floating
0 / floating
floating
floating
floating
floating
2
C setting.
2
2
S audio input signal in line with the
Section 8.7
C control mode.
Operational mode
selected:
Sleep mode
Fault mode (enabled by
system)
Soft mute mode (in I
control mode)
Soft mute (in Legacy control
mode)
3-state mode
Operational mode
2
for more information.
C setting.
[1]
© NXP B.V. 2009. All rights reserved.
TFA9812
[2]
2
2
C
S input
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