AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 52

• Manufacturer Part Number: AN10436
• Description: TDA8932B/33(B) Class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
AN10436_1
Application note
Fig 62. SE output power as a function of time
(W/channel)
R
board (55 mm × 45 mm) without heat sink.
(1) V
(2) V
(3) V
P
o
L
32
24
16
= 2 × 4 Ω SE; f
8
0
P
P
P
0
= 22 V
= 26 V
= 29 V
(3)
5.3 Thermal characterization
(2)
(1)
120
The measured thermal resistance of the reference design with an SO32 package, a
double-sided FR4 PCB (55 mm × 45 mm) and 35 μm copper, is equal to 44 K/W (free air
and natural convection).
When the junction temperature reaches the threshold level of the Thermal Foldback
(140 °C to 150 °C), it starts to reduce gradually the output power so the maximum
temperature will stay always within the Safe Operating Area.
Figure 62
at different supply voltages. The total output power of the device is 2 × P
measurement is performed at SE configuration.
Figure 64
different supply voltages. Total output power of the device is 1 × P
measurement is performed at BTL configuration.
i
= 1 kHz; 2 layer SO32 application
240
and
and
360
Figure 63
Figure 65
480
001aaf887
Rev. 01 — 12 December 2007
t (s)
show the TDA8932BT (S032) output power as a function of time
show the TDA8932BT output power as a function of time at
600
Fig 63. SE output power as a function of time
(W/channel)
P
R
board (55 mm × 45 mm) without heat sink.
(1) V
(2) V
o
L
32
24
16
= 2 × 8 Ω SE; f
8
0
P
P
TDA8932B/33(B) Class-D audio amplifier
0
= 30 V
= 34 V
(2)
(1)
120
i
= 1 kHz; 2 layer SO32 application
240
o
360
because the
AN10436
© NXP B.V. 2007. All rights reserved.
o
, because the
480
001aaf888
t (s)
600
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