sta335bw STMicroelectronics, sta335bw Datasheet - Page 51

• Manufacturer Part Number: sta335bw
• Description: 2.1 Channels High Efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA335BW
6
Package thermal characteristics
Using a double layer PCB the thermal resistance junction to ambient with 2 GND copper
area of 3x3 cm and with 16 via holes (see
The dissipated power within the device depends primarily on the supply voltage, load
impedance and output modulation level.
The max estimated dissipated power for the STA335BW is:
2 x 20 W @ 8 Ω , 18 V
2 x 10 W + 1 x 20 W @ 4 Ω , 8 Ω , 18 V
2 x 15 W @ 16 Ω, 24 V
Figure 12. Double layer PCB R
Figure 13
on board 2 x 2 cm and 3 x 3 cm.
Figure 13. PSSO36 power derating curve
shows the Power Derating curve for the PSSO36 package with two copper areas
Pd (W )
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
0
0
Copper Area 2x2 cm
and via holes
20
20
th j-amb
40
40
Copper Area 3x3 cm
and via holes
Pd max ~ 4 W
Pd max < 5 W
Pd max ~ 3 W
with 2 GND copper area and with 16 via holes
60
60
Figure
Tamb ( °C)
80
80
12) is 24 °C/W in natural air convection.
100
100
Package thermal characteristics
120
120
STA335BW
PSSO36
140
140
160
160
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