STA333BW datasheet(64/68 Pages) STMICROELECTRONICS

tên linh kiện	STA333BW

Giải thích chi tiết về linh kiện	2.1 channel 40 W high-efficiency digital audio system Sound Terminal

PDF	68 Pages

Scroll/Zoom	100%

nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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64 / 68 page

Package thermal characteristics

STA333BW

64/68

DocID13773 Rev 5

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 STA333BW is:

Figure 22 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 22. PowerSSO-36 power derating curve

2 x 20 W @ 8

, 18 V

Pd max is approximately 4 W

2 x 9 W + 1 x 20 W @ 4

, 8 ,18 V

Pd max is approximately 5 W

2040

6080

100

120

140

160

2040

6080

100

120

140

160

Pd (W)

Tamb ( °C)

Copper Area 2x2 cm

and via holes

STA339BW

PSSO36

Copper Area 3x3 cm

and via holes

2040

6080

100

120

140

160

2040

6080

100

120

140

160

2040

6080

100

120

140

160

Pd (W)

Tamb ( °C)

Copper Area 2x2 cm

and via holes

STA339BW

PSSO36

Copper Area 3x3 cm

and via holes

STA333BW

PowerSSO-

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