apa3012 Anpec Electronics Corporation, apa3012 Datasheet - Page 17

• Manufacturer Part Number: apa3012
• Description: 3w Mono Low-voltage Audio Power Amplifier
• Manufacturer: Anpec Electronics Corporation

Thermal Pad Consideration (Cont.)
If the ambient temperature is higher than 25°C, a larger
copper plane or forced-air cooling will be required to keep
the APA3012 junction temperature below the thermal shut-
do wn t em pe ra tu re ( 15 0°C) . In h ig he r am bi en t
temperature, higher airflow rate and/or larger copper area
will be required to keep the IC out of thermal shutdown.
Copyright
Rev. A.2 - Dec., 2008
Application Information (Cont.)
APA3012
ThermalVia diameter
12mil X 15
1.0mm
ThermalVia diameter
2.0mm
ANPEC Electronics Corp.
SOP-8P Land Pattern Recommendation
MSOP-8P Land Pattern Recommendation
12mil X 5
Ground plane for ThermalPAD
2.5mm
3mm
for ThermalPAD
Ground plane
0.65mm
0.25mm
17
Thermal Consideration
Linear power amplifiers dissipate a significant amount of
heat in the package under normal operating conditions.
To calculate maximum ambient temperatures, refer the
“Power Dissipation vs. Output Power” graphs. Given
and the total internal dissipation (P
bient temperature can be calculated with the following
equation. The maximum recommended junction tem-
perature for the APA3012 is 150°C. The internal dissipa-
tion figures are taken from the Power Dissipation vs.
Output Power graphs.
The APA3012 is designed with a thermal shutdown pro-
tection that turns the device off when the junction tem-
perature surpasses 150°C to prevent damaging the IC.
JA
, the maximum allowable junction temperature (T
150 - 50(1.3) = 85°C
T
AMax
= T
JMax
-
JA
P
D
D
), the maximum am-
www.anpec.com.tw
(13)
JMAX
),