TPA3116d2 amplifier board circuit diagram bridge

Circuit power audio amplifier IC TPA3116D2 D Class pcb

TPA3116d2 amplifier board circuit diagram bridge, 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 an 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, under voltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

Gain configuration

Gain R29(to GND) R28(to GVDD)
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, Under voltage, Over temperature, 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

Tpa3116D2 Amplifier Board Circuit Diagram

Printed Circuit Board Suggestion

Pcb Component Silk Tpa3116D2 Amplifier Board Circuit Diagram Bridge
Pcb Bottom Tpa3116D2 Amplifier Board Circuit Diagram Bridge
Pcb Top Tpa3116D2 Amplifier Board Circuit Diagram Bridge
Pcb Printed Circuit Board Tpa3116D2 Amplifier Board Circuit Diagram Bridge

List of components for assembly

Parts Value Description quantity
C1 2.2uF/63V Polyester Capacitor (5 × 3.5 mm) 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
C7 3.3µF/25V Electrolytic Capacitor
C22, C23, C26 1uF Polyester Capacitor (5 × 3.5 mm) 3
C39, C40, C41, C42 220n SMD Capacitor 0805 4
C47, C49 1000µ/35V Electrolytic Capacitor 2
C54, C55 1µF Polyester Capacitor (5 × 5 mm) 2
D1, DZ1 12V Zener Diode SMD 1
D2, D3, D4 1N4148 (LL4148) Diode SMD MiniMELF (SOD-80)
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, 2.54 mm 1
OUT Audio Output Terminal block 2 pins
VCC Power supply Terminal 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, R18 1K 102 – SMD Resistor 0805 1
R7 47K 473 – SMD Resistor 0805 1
R8 1M 105 – SMD Resistor 0805
R9 10K 103 – SMD Resistor 0805
R23, R28 100K 104 – SMD Resistor 0805 2
R30, R31, R32 3.3 3R3 – SMD Resistor 0805 3
P1 or P2 47k Simple Pot 47K or RK097 50K (503) 1
L1, L2 or (L1A, L2A) 10u /5A Inductor can be SMD CDRH127 or inductor with toroidal core or even equivalent 2
Welding, Wires, PCB, Box, power supply, heat sink, etc.

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


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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

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