TDA8932T/N1,112 NXP Semiconductors, TDA8932T/N1,112 Datasheet - Page 23

• Manufacturer Part Number: TDA8932T/N1,112
• Description: IC AMP AUDIO 55W STER D 32SOIC
• Manufacturer: NXP Semiconductors
• Type: Class Dr

Specifications of TDA8932T/N1,112

• Package / Case: 32-SOIC (7.5mm Width)
• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 55W x 1 @ 8 Ohm; 26.5W x 2 @ 4 Ohm
• Voltage - Supply: 10 V ~ 36 V, ±5 V ~ 18 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection
• Mounting Type: Surface Mount
• Product: Class-D
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935279642112; TDA8932T; TDA8932T

NXP Semiconductors
14. Application information
TDA8932_2
Preliminary data sheet
14.1 Output power estimation
The output power P
configuration can be estimated using
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%
V
R
R
R
R
t
f
= 25 C), R
w(min)
osc
P
L
DSon
s
ESR
= series resistance output inductor [ ]
= supply voltage V
= load impedance [ ]
= oscillator frequency [Hz]; 320 kHz typical with R
= equivalent series resistance SE capacitor [ ]
= minimum pulse width [s]; 80 ns typical
=
= on-resistance power switch [ ]
=
=
and
1.25 P
------------------------------------------------------------------------------------------------------------------------------------------ -
------------------------------------------------------------------------------------------------------------------------------------- -
----------------------------------------------------------
----------------------------------------------------- -
Figure 8
R
R
s
L
L
= 0.05 , R
+
+
2
R
o 0.5%
o
o
DSon
Rev. 02 — 12 December 2006
at THD+N = 0.5 %, just before clipping, for the SE and BTL
at THD+N = 10 % can be estimated by:
show the estimated output power at THD+N = 0.5 % and
R
R
R
DDP1
L
DSon
+
L
R
ESR
s
+
+
R
V
= 0.05
R
s
ESR
SSP1
2
8
R
[V] or V
Equation 2
R
1 t
L
L
1 t
–
and I
–
w min
w min
DDP2
O(ocp)
and
f
= 4 A (minimum).
osc
V
f
Equation
osc
SSP2
osc
V
[V]
= 39 k
P
V
P
2
3.
2
Class-D audio amplifier
DSon
= 0.15
TDA8932
© NXP B.V. 2006. All rights reserved.
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