STA339BW datasheet(74/78 Pages) STMICROELECTRONICS

Part #	STA339BW

Description	2.1-channel high-efficiency digital audio system

PDF	78 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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74 / 78 page

Package thermal characteristics

STA339BW

74/78

DocID15251 Rev 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 (see Figure 25) 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 STA339BW is:

Figure 25. Double-layer PCB with 2 copper ground areas and 16 via holes

Figure 26 shows the power derating curve for the PowerSSO-36 slug-down package on

PCBs with copper areas of 2 x 2 cm2 and 3 x 3 cm2.

Figure 26. PowerSSO-36 power derating curve

2 x 20 W @ 8

, 18 V

Pd max ~ 4 W

2 x 10 W + 1 x 20 W @ 4

, 8 ,18 V

Pd max < 5 W

STA339BW

PowerSSO-36

STA339BW Datasheet(PDF) 74 Page - STMicroelectronics