SLAA996A
June 2021 – June 2021
TPA6304-Q1
Trademarks
1
Introduction
2
Understanding the Thermal Flow
3
Understanding the Test and System Conditions
3.1
Device Efficiency
3.2
Test Signals
3.2.1
Sinusoidal Signal
3.2.2
Pink Noise
3.2.3
Music File
3.3
Ambient Temperature
3.4
Junction Temperature
3.5
Thermal Interface Material and Heatsink
4
Calculating Dynamic Thermal Dissipation
5
Designing a Realistic Thermal Test
6
Thermal Tests
6.1
Test Setup
6.2
5W 1kHz Sine Wave Test
6.2.1
Calculations
6.2.2
Dynamic Calculation Results
6.2.3
Tested Results
6.2.4
Summary of Results
6.3
10W 1kHz Sine Wave Test
6.3.1
Calculations
6.3.2
Dynamic Calculation Results
6.3.3
Tested Results
6.3.4
Summary of Results
6.4
5W Pink Noise Test
6.4.1
Calculations
6.4.2
Dynamic Calculation Results
6.4.3
Tested Results
6.4.4
Summary of Results
6.5
10W 1kHz 85°C Test
6.5.1
Calculations
6.5.2
Dynamic Calculation Results
6.5.3
Tested Results
6.5.4
Summary of Results
7
Overall Summary
8
References
9
Revision History
6.4
5W Pink Noise Test
Conditions:
PVDD Voltage: 14.4V
Load: 4Ω
All Channels in PLAY Mode
Input Signal: Pink Noise
Ambient Temperature: 75°C
Average Output Power: 5WCrest Factor: 6dB
Thermal Gain Foldback: Disabled