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STA339BWS 데이터시트(PDF) 72 Page - STMicroelectronics

부품명 STA339BWS
상세설명  2.1-channel 40-watt high-efficiency digital audio system Sound Terminal®
PDF  76 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA339BWS 데이터시트(HTML) 72 Page - STMicroelectronics

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Package thermal characteristics
STA339BWS
72/76
Doc ID 15276 Rev 5
8
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 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.
Thus, the maximum estimated dissipated power for the STA339BWS is:
Figure 23 shows the power derating curve for the PowerSSO-36 package on PCBs with
copper areas of 2 x 2 cm2 and 3 x 3 cm2.
Figure 23.
PowerSSO-36 power derating curve
2 x 20 W @ 8
Ω, 18 V
Pd max is approximately 4 W
2 x 9 W + 1 x 20 W @ 4
Ω, 8 Ω, 18 V
Pd max is approximately 5 W
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Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA339BW
PSSO36
Copper Area 3x3 cm
and via holes
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Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
STA339BW
PSSO36
Copper Area 3x3 cm
and via holes
STA339BWS
PowerSSO-36



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