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STA333ML Datenblatt(PDF) 18 Page - STMicroelectronics

Teilenummer STA333ML
Bauteilbeschribung  2-channel microless high-efficiency digital audio system Sound Terminal
PDF  23 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA333ML Datenblatt(HTML) 18 Page - STMicroelectronics

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Package thermal characteristics
STA333ML
18/23
DocID13177 Rev 8
6
Package thermal characteristics
Using a double layer PCB the thermal resistance junction to ambient with 2 copper ground
areas of 3 x 3 cm2 and with 16 via holes (see Figure 13) is 24 °C/W in natural air
convection.
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 is:
Figure 13. Double layer PCB with 2 copper ground areas and 16 via holes
Figure 14 shows the power derating curve for the PowerSSO-36 package on a board with
two copper areas of 2 x 2 cm2 and 3 x 3 cm2.
Figure 14. PowerSSO-36 power derating curve
2 x 20 W into 8
, at 18 V
Pd max is approximately 4 W
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Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA333BW
PSSO36
Copper Area 3x3 cm
and via holes
0
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2
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8
0
20
40
60
80
100
120
140
160
Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA333ML
PSSO36
Copper Area 3x3 cm
and via holes
0
1
2
3
4
5
6
7
8
0
20
40
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100
120
140
160
0
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120
140
160
0
1
2
3
4
5
6
7
8
0
20
40
60
80
100
120
140
160
Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA333BW
PSSO36
Copper Area 3x3 cm
and via holes
0
1
2
3
4
5
6
7
8
0
20
40
60
80
100
120
140
160
20
40
60
80
100
120
140
160
Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA333BW
PSSO36
Copper Area 3x3 cm
and via holes
0
1
2
3
4
5
6
7
8
0
20
40
60
80
100
120
140
160
0
1
2
3
4
5
6
7
8
0
0
1
2
3
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7
8
0
20
40
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100
120
140
160
0
1
2
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8
0
0
1
2
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7
8
0
20
40
60
80
100
120
140
160
0
1
2
3
4
5
6
7
8
0
20
40
60
80
100
120
140
160
Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA333ML
PSSO36
Copper Area 3x3 cm
and via holes
STA333ML
PowerSSO-36



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