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Philips Semiconductors
Power stage 2 x 15 to 25 W class-D
audio amplifier
13 AC CHARACTERISTICS
= ±15 V; T
= 25 °C; unless otherwise specified.
V
P
amb
SYMBOL
Single-ended application; note 1
P
output power
o
THD
total harmonic distortion
η
efficiency endstage
Notes
= ±15 V; R
= 8 Ω; f
1. V
P
L
in reference design (SE application) shown in Fig.5; unless otherwise specified.
2. Indirectly measured; based on R
3. Total Harmonic Distortion (THD) is measured in a bandwidth of 22 Hz to 20 kHz (AES 17 brickwall filter). When
distortion is measured using a low-order low-pass filter a significantly higher value will be found, due to the switching
frequency outside the audio band. Measured using the typical application circuit, given in Fig.5.
4. Efficiency for power stage.
2004 May 06
PARAMETER
= 1 kHz; f
= 310 kHz; R
i
osc
measurement.
ds(on)
CONDITIONS
= 8 Ω
R
L
THD = 0.5 %
THD = 10 %
= 6 Ω
R
L
THD = 0.5 %
THD = 10 %
P
= 1 W; note 3
o
f
= 1 kHz
i
f
= 10 kHz
i
= 2 × 15 W; f
P
= 1 kHz; note 4
o
i
= 0.1 Ω (series resistance of filter coil); T
s
9
Product specification
TDA8925
MIN.
TYP.
MAX.
−
(2)
10
12
−
(2)
14
15
−
−
16
−
−
20
−
0.05
0.1
−
−
0.2
−
−
94
= 25 °C; measured
amb
UNIT
W
W
W
W
%
%
%
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