NXP Semiconductors TDA8932B - Manual (Page 34)

TDA8932B_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 18 December 2008 34 of 48
NXP Semiconductors
TDA8932B
Class-D audio amplifier
V
i
= 100 mV (RMS); R
i
= 0
Ω
(1) V
P
= 12 V; R
L
= 4
Ω
(2) V
P
= 22 V; R
L
= 8 Ω
V
ripple
= 500 mV (RMS) referenced to ground; R
i
= 0
Ω
(shorted input)
(1) V
P
= 22 V; R
L
= 8
Ω
(2) V
P
= 12 V; R
L
= 4 Ω
Fig 28. Gain as a function of frequency Fig 29. Supply voltage ripple rejection as a function of
frequency
001aae116
20
30
40
G v
(dB)
10
f
i
(Hz)
10 10 5 10 4 10 2 10 3
(1) (2)
001aae117
−
60
− 40
− 80
− 20
0
SVRR
(dB)
− 100
f
i
(Hz)
10 10 5 10 4 10 2 10 3
(1)
(2)
R
i
= 0 Ω ; 20 kHz brick-wall filter AES17
(1) R
L
= 4
Ω
; V
P
= 12 V
(2) R
L
= 8
Ω
; V
P
= 22 V
f
i
= 1 kHz (short time P
O
); dashed line will require heat
sink for continuous time output power
(1) R
L
= 4 Ω ; THD+N = 10 %
(2) R
L
= 4
Ω
; THD+N = 0.5 %
(3) R
L
= 8
Ω
; THD+N = 10 %
(4) R
L
= 8
Ω
; THD+N = 0.5 %
Fig 30. Signal-to-noise ratio as a function of output
power
Fig 31. Output power as a function of supply voltage
001aae118
P o (W)
10
− 2 10 2 10 10
− 1 1
40
80
120
S/N
(dB)
0
(2)
(1)
001aaf893
V P (V)
10 34 26 18 14 30 22
40
50
30
20
10
60
70
P o
(W)
0
(2)
(1)
(3)
(4)