TFA9810 NXP Semiconductors, TFA9810 Datasheet - Page 20

• Manufacturer Part Number: TFA9810
• Description: The TFA9810 is a two-channel power comparator for high-efficiency class D audioamplifier systems
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TFA9810_3
Product data sheet
14.3 Speaker configuration and impedance
14.4 Differential input
14.5 Single-ended input
Example:
A 4
running into current limiting. Current limiting (clipping) will avoid audio holes, but it causes
a sound distortion similar to voltage clipping.
For a flat-frequency response (second-order Butterworth filter) it is necessary to change
the low-pass filter components L
impedance.
Table 12.
For a high common-mode rejection ratio and a maximum of flexibility in the application,
the audio inputs of the application are fully differential.
The input configuration for a differential-input application is illustrated in
When using an audio source with a single-ended ‘out’, it is important to connect the IN1N
from the application board to the VSS/GND of the audio source (e.g. Audio DSP).
The input configuration for single-ended ‘in’ application is illustrated in
Configuration
BTL
Fig 28. Input configuration for differential input
•
•
•
R
R
R
L
DSon
s
speaker in BTL configuration can be used up to a supply voltage of 12 V without
= series resistance [ ].
= load resistance [ ].
= drain-source on-state resistance [ ].
Filter component values
Table 12
AUDIO
DSP
V
SS
shows the practical required values:
Rev. 03 — 20 February 2008
+
Impedance [ ]
4
6
8
LC
and C
IN1N
IN1P
LC
according to the speaker configuration and
L
10
16
22
LC
[ F]
OUT1N
OUT1P
Audio amplifier 2 x 12 W
C
1500
1000
680
010aaa021
LC
Figure
© NXP B.V. 2008. All rights reserved.
TFA9810
[nF]
Figure
29.
28.
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