TDA8933B NXP Semiconductors, TDA8933B Datasheet - Page 28

• Manufacturer Part Number: TDA8933B
• Description: The TDA8933B is a high-efficiency class D amplifier with low power dissipation
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8933B_1
Preliminary data sheet
Fig 12. Total harmonic distortion-plus-noise as a function of output power
THD+N
(%)
(1) f
(2) f
(3) f
10
10
10
a. V
10
10
1
2
1
2
3
10
i
i
i
2
= 6 kHz
= 1 kHz
= 100 Hz
P
= 25 V; R
14.9 SE curves measured in the reference design
10
1
L
= 2
The pumping effect should not cause a malfunction of either the audio amplifier or the
power supply, which can also be caused by triggering of the undervoltage or overvoltage
protection of the amplifier.
Pumping effects in an SE configuration can be minimized by connecting audio inputs in
anti-phase and changing the polarity of one speaker as shown in
(1)
(2)
Fig 11. SE application for reducing pumping effect
8
1
(3)
SE
P
10
o
(W/channel)
010aaa503
audio
audio
in1
in2
Rev. 01 — 23 October 2008
10
2
IN1N
IN2N
IN1P
IN2P
THD+N
(%)
10
10
10
b. V
10
10
1
2
1
2
3
10
2
P
= 17 V; R
(1)
10
1
L
= 2
OUT1
OUT2
(3)
4
1
(2)
010aaa140
Class D audio amplifier
SE
Figure
TDA8933B
P
10
o
© NXP B.V. 2008. All rights reserved.
(W/channel)
11.
010aaa504
10
2
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