Circuit power audio amplifier IC TPA3116D2 D Class

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Introducing this mini home amplifier module for home audio power for applications such as PC audio amplification, guitar, ambient sound, mini active boxes. This small chip works in class D being stereo amplifiers with digital power wire stage for loudspeakers up to 100W at 2 Ohms in mono.

The TPA3116D2 series are stereo efficient, digital amplifier power stage for driving speakers up to 100 W / 2 Ω in mono. The high efficiency of the TPA3130D2 allows it to do 2 × 15 W without external heat sink on a single layer PCB. The TPA3118D2 can even run 2 × 30 W / 8 Ω without heat sink on a dual layer PCB. If even higher power is needed the TPA3116D2 does 2 × 50 W / 4 Ω with a small heat-sink attached to its top side PowerPAD. All three devices share the same footprint enabling a single PCB to be used across different power levels.

The TPA3116D2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences; this is achieved together with an option of either master or slave option, making it possible to synchronize multiple devices.

The TPA3116D2 devices are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

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Gain configuration

Gain R29(toGND) R28(toGVDD)
20dB 5,6K Open
26dB 20K 100K
32dB 39K 100K
36dB 47K 75K



  • Supports Multiple Output Configurations
    • 2 × 100 W Into a 4-Ω PBTL Load at 21 V (TPA3116D2)
  • Wide Voltage Range: 4.5 V to 26 V
  • Efficient Class-D Operation
    • >90% Power Efficiency Combined With Low Idle Loss Greatly Reduces Heat Sink Size
    • Advanced Modulation Schemes
  • Multiple Switching Frequencies
    • AM Avoidance
    • Master and Slave Synchronization
    • Up to 1.2-MHz Switching Frequency
  • Feedback Power-Stage Architecture With High PSRR Reduces PSU Requirements
  • Programmable Power Limit
  • Differential and Single-Ended Inputs
  • Stereo and Mono Mode With Single-Filter Mono Configuration
  • Single Power Supply Reduces Component Count
  • Integrated Self-Protection Circuits Including Overvoltage, Undervoltage, Overtemperature, DC-Detect, and Short Circuit With Error Reporting
  • Thermally Enhanced Packages
    • DAD (32-Pin HTSSOP Pad Up)
    • DAP (32-Pin HTSSOP Pad Down)
  • –40°C to 85°C Ambient Temperature Range

Amplifier Scheme with TPA3116

Amplifier Scheme With Tpa3116
Amplifier Scheme With Tpa3116

Printed Circuit Board Suggestion

Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Bottom
Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Bottom
Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Bottom
Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Bottom
Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Top
Circuit Power Audio Amplifier Ic Tpa3116D2 D Class Pcb Top
Printed Circuit Board
Printed Circuit Board

List of components for assembly

Parts Value Description quantity
C1 2.2uF/63V Polyester Capacitor (5mmx3,5mm) 1
C2, C3 100µF/25V Electrolytic Capacitor 2
C4, C29, C31, C46 100n SMD Capacitor 0805 4
C5, C62, C63 10n SMD Capacitor 0805 3
C6, C38, C43, C56, C57 1n SMD Capacitor 0805 5
C22, C23, C26 1uF Polyester Capacitor (5mmx3,5mm) 3
C39, C40, C41, C42 220n SMD Capacitor 0805 4
C47, C49 470µ/35V Electrolytic Capacitor 2
C54, C55 1µF Polyester Capacitor (7,5mmX5mm) 2
D1 12V Zener Diode SMD 1
IC1 NE5532 or equivalent IC SMD -SO (8) 1
IC2 TPA3116D2 IC class D audio amplifier of the TI 1
IN Audio input 2-pin vertical connector 2.54mm 1
OUT Audio Output Terminal block 2 pins
VCC Powers supply erminal block 2 pins
Resistors SMD 0805
R1 100k 104 – SMD Resistor 0805 1
R2 2K 202 – SMD Resistor 0805 1
R3, R4 6.8K 682 – SMD Resistor 0805 2
R5, R29 20K 203 – SMD Resistor 0805 2
R6 1K 102 – SMD Resistor 0805 1
R7 47K 473 – SMD Resistor 0805 1
R23, R28 100K 104 – SMD Resistor 0805 2
R30, R31, R32 3.3 3R30 – SMD Resistor 0805 3
P1 or P2 47k Simple Pot 47K or RK097 50K (503) 1
L1, L3 or ( L5, L6) 10u /5A Inductor can be SMD CDRH127 or inductor with toroidal core or even equivalent 2
Welding, Wires, Pci, Box, power supply, heat sink, etc.


Download PDF files for this project: Includes suggestion of Printed Circuit Board in PDF, PNG and Gerber


Datasheet PDF

TPA3116D2EVM Evaluation Module


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Crash Course Electronics and PCB Design
Crash Course Electronics and PCB Design
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS