The TDA8933B is a high-efficiency class D amplifier with low power dissipation

TDA8933B

Manufacturer Part NumberTDA8933B
DescriptionThe TDA8933B is a high-efficiency class D amplifier with low power dissipation
ManufacturerNXP Semiconductors
TDA8933B datasheet
 
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NXP Semiconductors
SE configuration:
P
o 0.5%
BTL configuration:
P
o 0.5%
Where:
V
P
R
L
R
DSon
R
s
R
ESR
t
w(min)
f
osc
The output power P
P
o 10%
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
= 25 C), R
j
TDA8933B_1
Preliminary data sheet
R
L
----------------------------------------------------------
R
+
R
+
R
+
R
L
DSon
s
ESR
=
------------------------------------------------------------------------------------------------------------------------------------------ -
8
R
L
------------------------------------------------------ -
R
+
2
R
+
R
L
DSon
s
=
-------------------------------------------------------------------------------------------------------------------------------------- -
2
= supply voltage V
V
DDP1
SSP1
= load resistance (
= drain-source on-state resistance (
= series resistance output inductor (
= Equivalent Series Resistance SE capacitance ( )
= minimum pulse width(s); 80 ns typical
= oscillator frequency (Hz); 320 kHz typical with R
at THD+N = 10 % can be estimated by:
o
=
1.25 P
o 0.5%
and
Figure 8
show the estimated output power at THD+N = 0.5 % and
= 0.05 , R
= 0.05
s
ESR
Rev. 01 — 23 October 2008
TDA8933B
Class D audio amplifier
2
1 t
f
V
w min
osc
P
R
L
2
1 t
f
V
w min
osc
P
R
L
(V) or V
V
(V)
DDP2
SSP2
= 39 k
osc
DSon
and I
= 2 A (minimum).
O(ocp)
(2)
(3)
(4)
= 0.38
(at
© NXP B.V. 2008. All rights reserved.
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