# High-Fidelity Class-D Audio Amplifier ## Description 50-W Stereo Analog Input Class-D Audio Amplifier with a small number of external components mounted on a circuit board that can be used to directly drive a speaker with an external analog audio source as the input; can also be configured as a 100-W, Class-D mono audio amplifier in PBTL mode. ## Project Details - **Owner:** dacre - **Created:** 4/7/2026 - **Last Updated:** 4/8/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### AM0 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Part Type: Mechanical - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### AM1 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### AM2 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### GND — [73099-0](https://www.flux.ai/vasy_skral/73099-0.md) - Part Type: Connectors - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Manufacturer Name: Pomona Electronics - Symbol Style: Parametric - Manufacturer Part Number: 73099-0 - Mount: PCB **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### H1 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H2 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H3 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H4 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### HEATSINK — [ATS-TI1OP-521-C1-R1](https://www.flux.ai/cherepanyadima/ats-ti1op-521-c1-r1-izdzo.md) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/931/ATS-TI10P-521-C1-R1.pdf - Symbol Style: Parametric - Part Type: Heat Sinks - Mount: Vertical - Manufacturer Name: Advanced Thermal Solutions Inc. - Manufacturer Part Number: ATS-TI1OP-521-C1-R1 - Package or Case Code: TO **Pins:** - S2 [pin S2] - S1 [pin S1] ### JP1 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Part Type: Mechanical - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### JP2 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### JP4 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open.md) - Part Type: Mechanical - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### LEFT- — [73099-0](https://www.flux.ai/vasy_skral/73099-0.md) - Part Type: Connectors - Symbol Style: Parametric - Manufacturer Part Number: 73099-0 - Manufacturer Name: Pomona Electronics - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Mount: PCB **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### LEFT+ — [73099-2](https://www.flux.ai/vasy_skral/73099-2.md) - Part Type: Connectors - Mount: PCB - Manufacturer Part Number: 73099-2 - Symbol Style: Parametric - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Manufacturer Name: Pomona Electronics **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### LIN — [PJRAN1X1U03AUX](https://www.flux.ai/vasy_skral/pjran1x1u03aux.md) - Manufacturer Name: Switchcraft Inc. - Manufacturer Part Number: PJRAN1X1U03AUX - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Switchcraft%20PDFs/PJRA(N,S).pdf - Part Type: Connector **Pins:** - SHUNT [pin 3] - SLEEVE [pin 1] - TIP [pin 2] ### MODESEL — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: NKK Switches - Manufacturer Part Number: GB15AV-XC - Symbol Style: Parametric - Part Type: Switch - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### MUTE — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches - Symbol Style: Parametric - Part Type: Switch - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### PVCC — [73099-2](https://www.flux.ai/vasy_skral/73099-2.md) - Part Type: Connectors - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Manufacturer Name: Pomona Electronics - Symbol Style: Parametric - Manufacturer Part Number: 73099-2 - Mount: PCB **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### Q1 — [MMBT2222A,215](https://www.flux.ai/adrian95/mmbt2222ac215.md) - Manufacturer Part Number: MMBT2222A,215 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Nexperia USA Inc. - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/MMBT2222A.pdf - Part Type: Transistor **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### RIGHT- — [73099-0](https://www.flux.ai/vasy_skral/73099-0.md) - Part Type: Connectors - Symbol Style: Parametric - Manufacturer Part Number: 73099-0 - Manufacturer Name: Pomona Electronics - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Mount: PCB **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### RIGHT+ — [73099-2](https://www.flux.ai/vasy_skral/73099-2.md) - Mount: PCB - Symbol Style: Parametric - Manufacturer Part Number: 73099-2 - Manufacturer Name: Pomona Electronics - Datasheet URL: http://assets.edgenet.com/bc247afe-c6d3-4b5e-af4b-80e7f9cda64b - Part Type: Connectors **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - Signal [pin 5] ### RIN — [PJRAN1X1U01X](https://www.flux.ai/adrian95/pjran1x1u01x.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Switchcraft%20PDFs/PJRA(N,S).pdf - Part Type: Connector - Manufacturer Name: Switchcraft Inc. - Manufacturer Part Number: PJRAN1X1U01X - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - SHUNT [pin 3] - SLEEVE [pin 1] - TIP [pin 2] ### RV1 — [TC42X-2-104E](https://www.flux.ai/vasy_skral/tc42x-2-104e.md) - Symbol Style: Parametric - Part Type: Potentiometer - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TC42X-2-104E - Resistance: 100kΩ - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/TC42.pdf - Manufacturer Name: Bourns Inc. **Pins:** - CCW [pin 1] - CW [pin 3] - WIPER [pin 2] ### SHUTDOWN — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Part Type: Switch - Symbol Style: Parametric - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: NKK Switches - Manufacturer Part Number: GB15AV-XC **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW1 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - Symbol Style: Parametric - Part Type: Switch **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW2 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - Symbol Style: Parametric - Part Type: Switch - Manufacturer Name: NKK Switches - Manufacturer Part Number: GB15AV-XC - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW3 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - Symbol Style: Parametric - Part Type: Switch - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW4 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Manufacturer Name: NKK Switches - Manufacturer Part Number: GB15AV-XC - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - Symbol Style: Parametric - Part Type: Switch **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW5 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - Part Type: Switch - Symbol Style: Parametric **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW6 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Part Type: Switch - Symbol Style: Parametric - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: NKK Switches - Manufacturer Part Number: GB15AV-XC **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW7 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches - Symbol Style: Parametric - Part Type: Switch - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### SW8 — [GB15AV-XC](https://www.flux.ai/vasy_skral/gb15av-xc.md) - Part Type: Switch - Symbol Style: Parametric - Datasheet URL: https://www.nkkswitches.com/pdf/Gpushbuttons.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: GB15AV-XC - Manufacturer Name: NKK Switches **Pins:** - COM [pin 5] - MH1 [pin MH1] - MH2 [pin MH2] - NC [pin 6] - NO [pin 4] ### U1 — [TPA3116D2DAD](https://www.flux.ai/lcsc/tpa3116d2dad.md) - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - LCSC Part Number: C2865736 - Manufacturer Part Number: TPA3116D2DAD - Package or Case Code: HTSSOP-32_L11.0-W6.1-P0.65-LS8.1-BL - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric - JLCPCB Part Class: Extended Part - Part Type: Audio Power OpAmps **Pins:** - AM0 [pin 15] - AM1 [pin 14] - AM2 [pin 13] - AVCC [pin 17] - BSNL [pin 20] - BSNR [pin 26] - BSPL [pin 24] - BSPR [pin 30] - FAULTZ [pin 3] - GAIN/SLV [pin 8] - GND [pin 25] - GND [pin 22] - GND [pin 9] - GND [pin 28] - GVDD [pin 7] - LINN [pin 11] - LINP [pin 10] - MODSEL [pin 1] - MUTE [pin 12] - OUTNL [pin 21] - OUTNR [pin 27] - OUTPL [pin 23] - OUTPR [pin 29] - PLIMIT [pin 6] - PVCC [pin 31] - PVCC [pin 32] - PVCC [pin 18] - PVCC [pin 19] - RINN [pin 5] - RINP [pin 4] - SDZ [pin 2] - SYNC [pin 16] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dacre/high-fidelity-class-d-audio-amplifier](https://www.flux.ai/dacre/high-fidelity-class-d-audio-amplifier).* --- *Generated from [https://www.flux.ai/dacre/high-fidelity-class-d-audio-amplifier](https://www.flux.ai/dacre/high-fidelity-class-d-audio-amplifier)*