TDA8933B NXP Semiconductors, TDA8933B Datasheet - Page 22

• 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
SE configuration:
BTL configuration:
Where:
The output power P
Figure 7
THD+N = 10 % as a function of the supply voltage for SE and BTL configurations at
different load impedances. The output power is calculated with: R
T
P
P
P
j
•
•
•
•
•
•
•
o 0.5%
o 0.5%
o 10%
= 25 C), R
V
R
R
R
R
t
f
w(min)
osc
P
L
DSon
s
ESR
= series resistance output inductor (
= load resistance (
= supply voltage V
= oscillator frequency (Hz); 320 kHz typical with R
=
=
=
and
= Equivalent Series Resistance SE capacitance ( )
= minimum pulse width(s); 80 ns typical
= drain-source on-state resistance (
1.25 P
------------------------------------------------------------------------------------------------------------------------------------------ -
-------------------------------------------------------------------------------------------------------------------------------------- -
----------------------------------------------------------
------------------------------------------------------ -
Figure 8
R
R
s
L
L
= 0.05 , R
+
+
2
R
o 0.5%
o
DSon
at THD+N = 10 % can be estimated by:
Rev. 01 — 23 October 2008
show the estimated output power at THD+N = 0.5 % and
R
R
R
L
DSon
+
L
DDP1
R
ESR
s
+
+
R
= 0.05
R
s
ESR
V
2
SSP1
8
R
R
1 t
L
(V) or V
L
1 t
–
and I
–
w min
w min
O(ocp)
DDP2
f
= 2 A (minimum).
osc
f
osc
V
SSP2
V
osc
V
P
(V)
P
= 39 k
2
2
Class D audio amplifier
DSon
TDA8933B
= 0.38
© NXP B.V. 2008. All rights reserved.
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