tfa9810t-n1 NXP Semiconductors, tfa9810t-n1 Datasheet - Page 18

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tfa9810t-n1

Manufacturer Part Number
tfa9810t-n1
Description
Tfa9810 Stereo Full-bridge Audio Amplifier 2 X 12 W
Manufacturer
NXP Semiconductors
Datasheet
NXP Semiconductors
Table 11.
T
[1]
13. Quality specification
14. Application information
TFA9810_2
Preliminary data sheet
Symbol
THD+N
G
V
S/N
SVRR
amb
po
cs
n(o)
v(cl)
Minimum value determined by R5, R10, R17, R22 equalling +1 % and R7, R14, R18, R20 equalling 1 %.
= 25 C; V
AC characteristics measured in typical application
Parameter
total harmonic
distortion-plus-noise
output power
efficiency
closed-loop voltage
gain
noise output voltage
signal-to-noise ratio
supply voltage ripple
rejection
channel separation
P
14.1 Output power estimation
= 12 V; R
In accordance with SNW-FQ-611-E, ‘if this type is used as an audio amplifier’. The
number of the quality specification can be found in the Quality Reference Handbook. The
handbook can be ordered using the code 9398 510 63011.
For BTL configuration the output power just before clipping can be estimated using
Equation
Where,
The output power at 10 % THD can be estimated by using
Figure 26
THD = 10 % as a function of the BLT supply voltage for different load impedances.
P
L
o
BTL : P
10 %
= 8
V
R
R
R
P
P
o0.5 %
L
DSon
s
= supply voltage (V
= series resistance [ ]
= load resistance [ ]
=
f
1:
osc
o
1.25 P
and
= drain-source on-state resistance [ ]
0.5 %
= output power at the THD level of 0.5 % [W]
Conditions
P
brick-wall filter
P
V
Inputs shorted;
AES17 brick-wall filter
V
V
P
= 550 kHz;
o
o
I
o
ripple
o
= 100 mV (RMS); f
= 10 V(RMS); gain 20 dB
is 1 W; f = 1 kHz; AES17
= 9 W
= 1 W; f
Figure 27
=
= 2 Vpp; f
o
-------------------------------------------------------------------------------- -
0.5 %
----------------------------------------------------- -
R
i
L
Rev. 02 — 30 August 2007
= 1 kHz
Figure 33
+
below show the estimated output power at THD = 0.5 % and
2
I
DDPx
= 1kHz
R
R
2
i
L
DSon
= 1 kHz
unless otherwise specified.
V
R
SSPx
L
+
…continued
R
) [V]
s
[1]
V
P
Min
-
87
19
-
-
34
55
2
Equation
Typ
0.04
89
19.7
150
96
45
70
Audio amplifier 2 x 12 W
2:
Max
0.1
-
21
-
-
-
-
© NXP B.V. 2007. All rights reserved.
TFA9810
Unit
%
%
dB
dB
dB
dB
18 of 29
V
(1)
(2)

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