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STA369BWS Fiches technique(PDF) 85 Page - STMicroelectronics

No de pièce STA369BWS
Description  2.1-channel 40-watt high-efficiency digital audio system Sound Terminal?
PDF  89 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA369BWS Fiches technique(HTML) 85 Page - STMicroelectronics

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STA369BWS
Package thermal characteristics
Doc ID 16861 Rev 4
85/89
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 STA369BWS is:
Figure 29 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 29.
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
STA369BWS
PowerSSO-36



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