TDA7492MV13TR STMicroelectronics, TDA7492MV13TR Datasheet - Page 26

• Manufacturer Part Number: TDA7492MV13TR
• Description: IC AMP AUD CLASS D BTL PWRSSO36
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7492MV13TR

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 50W x 1 @ 6 Ohm
• Voltage - Supply: 5 V ~ 18 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-11059-2

Application information
7.9
26/28
Heatsink requirements
A thermal resistance of 24 °C/W can be obtained using the PCB copper ground layer with
16 vias connecting it to the contact area for the exposed pad. Ensure that the copper ground
area is a nominal 9 cm
Figure 27
As with most amplifiers, the power dissipated within the device depends primarily on the
supply voltage, the load impedance and the output modulation level.
The maximum estimated power dissipation for the TDA7491MV is less than 4 W. When
properly mounted on the above PCB the junction temperature could increase by 96 °C.
However, with a musical program the dissipated power is about 40% less, leading to a
temperature increase of around 60 °C. Even at the maximum recommended ambient
temperature for consumer applications of 50 °C there is still a clear safety margin before the
maximum junction temperature (150 °C) is reached.
Figure 27. Power derating curves for PCB used as heatsink
Pd (W)
shows the derating curves for copper areas of 4 cm
8
7
6
5
4
3
2
1
0
0
Copper Area 2x2 cm
and via holes
2
for 24 °C/W.
20
Doc ID 14576 Rev 2
Copper Area 3x3 cm
and via holes
40
60
Tamb ( °C)
80
g
100
2
and 9 cm
TDA7491P
PSSO36
TDA7491MV
PowerSSO-36
120
2
.
140
TDA7491MV
160