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Philips Semiconductors
12.3 Mono BTL application
Table 10:
Mono BTL application characteristics
= ± 27 V; R
= 8 Ω ; f
V
P
L
i
Symbol
Parameter
P
output power
o
THD
total harmonic distortion
G
closed loop voltage gain
v(cl)
SVRR
supply voltage ripple rejection
Z
input impedance
i
V
noise output voltage
n(o)
V
output signal in mute
o(mute)
CMRR
common mode rejection ratio
[1]
R
is the series resistance of inductor of low-pass LC filter in the application.
sL
[2]
Output power is measured indirectly; based on R
[3]
Total harmonic distortion is measured in a bandwidth of 22 Hz to 20 kHz, using an AES17 20 kHz brickwall filter. Maximum limit is
guaranteed but may not be 100 % tested.
[4]
V
= V
= 2 V (p-p); R
ripple
ripple(max)
[5]
B = 22 Hz to 20 kHz, using an AES17 20 kHz brickwall filter.
[6]
B = 22 Hz to 20 kHz, using an AES17 20 kHz brickwall filter; independent of R
[7]
V
= V
= 1 V (RMS); f
i
i(max)
13. Application information
13.1 BTL application
9397 750 13356
Preliminary data sheet
= 1 kHz; f
= 317 kHz; R
osc
= 0 Ω.
s
= 1 kHz.
i
When using the power amplifier in a mono BTL application the inputs of both channels
must be connected in parallel and the phase of one of the inputs must be inverted (see
Figure
6). In principle the loudspeaker can be connected between the outputs of the two
single-ended demodulation filters.
< 0.1 Ω
= 25 ° C; unless otherwise specified.
[1]
; T
sL
amb
Conditions
= 6 Ω; V
= ±27 V
R
L
P
THD = 0.5 %
THD = 10 %
= 8 Ω; V
= ±27 V
R
L
P
THD = 0.5 %
THD = 10 %
P
= 1 W
o
f
= 1 kHz
i
f
= 6 kHz
i
operating
f
= 100 Hz
i
f
= 1 kHz
i
mute; f
= 100 Hz
i
standby; f
= 100 Hz
i
operating
= 0 Ω
R
s
mute
V
= 1 V (RMS)
i(CM)
measurement. See also
DSon
Rev. 01 — 1 October 2004
2 × 100 W class-D power amplifier
Min
[2]
-
-
[2]
-
-
[3]
-
-
35
[4]
-
70
[4]
-
[4]
-
22
[5]
-
[6]
-
[7]
-
-
Section
13.3.
.
s
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
TDA8920B
Typ
Max
Unit
174
-
W
210
-
W
138
-
W
173
-
W
0.02
0.05
%
0.03
-
%
36
37
dB
80
-
dB
80
-
dB
80
-
dB
80
-
dB
34
-
kΩ
µV
300
-
µV
220
-
µV
200
-
75
-
dB
15 of 34
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