AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 44

• Manufacturer Part Number: AN10436
• Description: TDA8932B/33(B) Class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
5. Performance characterization TDA8932B
Table 9.
AN10436_1
Application note
Symbol Parameters
V
P
THD+N total harmonic
η
G
V
po
P
o(RMS)
i(sens)
v(cl)
supply voltage
RMS output power
distortion-plus-noise
output power
efficiency
closed-loop voltage
gain
input sensitivity
voltage
Performance figures
5.1.1 Performance figures SE
5.1 Audio characterization SE
Example:
A 2 × 15 W amplifier at 22 V and 89 % efficiency will draw an average supply current of
1.53 A.
Remark: For either a 50 Hz / 60 Hz transformer or a weak auxiliary supply, it might be
worthwhile to consider the use of a symmetrical supply to avoid asymmetrical clipping
(early clipping of the positive output voltage).
Table 9
board (55 mm × 45 mm) configured in SE configuration.
V
otherwise.
P
V
= 22 V, R
P
= supply voltage (V) (V
Conditions / notes
operates down to UVP threshold level
operates up to OVP threshold level
Continuous time output power per channel
R
R
short time output power
R
P
P
V
P
shows the measured performance figures of the TDA8932BT two layer reference
o
o
i
rated
L
L
L
THD+N = 10 %
THD+N = 0.5 %
THD+N = 10 %
THD+N = 0.5 %
THD+N = 10 %
THD+N = 0.5 %
R
R
R
R
= 100 mV
= 1 W, AES17 brick wall filter 20 kHz
= 15 W
= 4 Ω
= 8 Ω, V
= 4 Ω, VP = 29 V
L
L
L
L
= 4 Ω
= 8 Ω, V
= 4 Ω
= 8 Ω, V
= 2 × 15 W
L
= 2 × 4 Ω SE, f
P
RMS
= 30 V
P
P
= 30 V
= 30 V
Rev. 01 — 12 December 2007
, 1 kHz, R
DDP
osc
i
= 4.7 kΩ, no load
- V
= 320 kHz, f
SSP
)
i
= 1 kHz, T
TDA8932B/33(B) Class-D audio amplifier
Min
10
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[1]
amb
Typ
-
-
-
15.3
12.1
-
15.5
12.3
-
-
26.5
21.1
-
0.015
0.01
-
92
93
29.2
305
= 25 °C unless specified
AN10436
© NXP B.V. 2007. All rights reserved.
Max
36
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[1]
Unit
V
-
-
W
W
-
W
W
-
-
W
W
-
%
%
-
%
%
dB
mV
44 of 55
RMS