NXP Semiconductors TDA8932B - Manual (Page 20)

TDA8932B_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 18 December 2008 20 of 48
NXP Semiconductors
TDA8932B
Class-D audio amplifier
[1] R
s
is the series resistance of inductor and capacitor of low-pass LC filter in the application.
[2] THD+N is measured in a bandwidth of 20 Hz to 20 kHz, AES17 brick wall.
[3] Maximum V
ripple
= 2 V (p-p); R
s
= 0
Ω
.
[4] B = 20 Hz to 20 kHz, AES17 brick wall.
[5] Output power is measured indirectly; based on R
DSon
measurement.
Two layer application board (55 mm
×
45 mm), 35
µ
m copper, FR4 base material in free air with natural convection.
CMRR common mode rejection ratio V
i(cm)
= 1 V (RMS) - 75 - dB
η
po
output power efficiency P
o
= 15 W
V
P
= 22 V; R
L
= 4
Ω
90 92 - %
V
P
= 30 V; R
L
= 8
Ω
91 93 - %
P
o(RMS)
RMS output power continuous time output power per
channel [5]
R
L
= 4
Ω
; V
P
= 22 V
THD+N = 0.5 %; f
i
= 1 kHz 10.9 12.1 - W
THD+N = 0.5 %; f
i
= 100 Hz - 12.1 - W
THD+N = 10 %; f
i
= 1 kHz 13.8 15.3 - W
THD+N = 10 %; f
i
= 100 Hz - 15.3 - W
R
L
= 8
Ω
; V
P
= 30 V
THD+N = 0.5 %; f
i
= 1 kHz 11.1 12.3 - W
THD+N = 0.5 %; f
i
= 100 Hz - 12.3 - W
THD+N = 10 %; f
i
= 1 kHz 14.0 15.5 - W
THD+N = 10 %; f
i
= 100 Hz - 15.5 - W
short time output power per channel [5]
R
L
= 4
Ω
; V
P
= 29 V
THD+N = 0.5 % 19.0 21.1 - W
THD+N = 10 % 23.8 26.5 - W
Table 12. SE characteristics …continued
V
P
= 22 V; R
L
= 2
×
4
Ω
; f
i
= 1 kHz; f
osc
= 320 kHz; R
s
< 0.1
Ω [1] ; T
amb
= 25
°
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Table 13. BTL characteristics
V
P
= 22 V; R
L
= 8
Ω
; f
i
= 1 kHz; f
osc
= 320 kHz; R
s
< 0.1
Ω [1] ; T
amb
= 25
°
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
THD+N total harmonic
distortion-plus-noise P
o
= 1 W [2]
f
i
= 1 kHz - 0.007 0.1 %
f
i
= 6 kHz - 0.05 0.1 %
G
v(cl)
closed-loop voltage gain 35 36 37 dB
SVRR supply voltage rejection ratio Operating mode [3]
f
i
= 100 Hz - 75 - dB
f
i
= 1000 Hz 70 75 - dB
sleep; f
i
= 100 Hz [3] - 80 - dB
|
Z
i
|
input impedance differential 35 50 k
Ω