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.

Gain configuration




  • 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

C12.2uF/63VPolyester Capacitor (5mmx3,5mm)1
C2, C3100µF/25VElectrolytic Capacitor2
C4, C29, C31, C46100nSMD Capacitor 08054
C5, C62, C6310nSMD Capacitor 08053
C6, C38, C43, C56, C571nSMD Capacitor 08055
C22, C23, C261uFPolyester Capacitor (5mmx3,5mm)3
C39, C40, C41, C42220nSMD Capacitor 08054
C47, C49470µ/35VElectrolytic Capacitor2
C54, C551µFPolyester Capacitor (7,5mmX5mm)2
D112VZener Diode SMD1
IC1NE5532 or equivalentIC SMD -SO (8)1
IC2TPA3116D2IC class D audio amplifier of the TI1
INAudio input2-pin vertical connector 2.54mm1
OUTAudio OutputTerminal block 2 pins
VCCPowers supplyerminal block 2 pins
Resistors SMD 0805
R1100k104 – SMD Resistor 08051
R22K202 – SMD Resistor 08051
R3, R46.8K682 – SMD Resistor 08052
R5, R2920K203 – SMD Resistor 08052
R61K102 – SMD Resistor 08051
R747K473 – SMD Resistor 08051
R23, R28100K104 – SMD Resistor 08052
R30, R31, R323.33R30 – SMD Resistor 08053
P1 or P247kSimple Pot 47K or RK097 50K (503)1
L1, L3 or ( L5, L6)10u /5AInductor can be SMD CDRH127 or inductor with toroidal core or even equivalent2
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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