# 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:** jharwinbarrozo - **Created:** 5/20/2026 - **Last Updated:** 5/21/2026 - **Visibility:** Public - **Stars:** 2 - **Forks:** 2 ## Key Components ### AM0 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Part Type: Mechanical - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### AM1 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Part Type: Mechanical - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### AM2 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Part Type: Mechanical - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### J1 — [KF301-5.0-2P](https://www.flux.ai/jecstronic/kf301-50-2p~99i.md) - Exclude from BOM: false - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - Manufacturer Name: Aliexpress **Pins:** - P1 [pin 1] - P2 [pin 2] ### JP1 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### JP2 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### JP3 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Part Type: Mechanical - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### JP4 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false - Part Type: Mechanical **Pins:** - A [pin 1] - B [pin 2] ### JP5 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Exclude from BOM: false - Part Type: Mechanical - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### JP6 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Part Type: Mechanical - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### LEFT — [KF301-5.0-2P](https://www.flux.ai/jecstronic/kf301-50-2p~99i.md) - Exclude from BOM: false - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - Manufacturer Name: Aliexpress - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [MMBT2222A,215](https://www.flux.ai/adrian95/mmbt2222ac215~dx8.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/MMBT2222A.pdf - Part Type: Transistor - Manufacturer Name: Nexperia USA Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MMBT2222A,215 **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### RIGHT — [KF301-5.0-2P](https://www.flux.ai/jecstronic/kf301-50-2p~99i.md) - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector - Manufacturer Name: Aliexpress - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - License: https://creativecommons.org/licenses/by/4.0/ - Exclude from BOM: false **Pins:** - P1 [pin 1] - P2 [pin 2] ### RV1 — [TC33X-2-104E](https://www.flux.ai/lcsc/tc33x-2-104e~kbaz.md) - JLCPCB Part Class: Extended Part - Part Type: Variable Resistors/Potentiometers - Manufacturer Part Number: TC33X-2-104E - LCSC Part Number: C719186 - Manufacturer Name: BOURNS - Package or Case Code: RES-ADJ-SMD_TC33X-2-104E **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### U1 — [TPA3116D2DAD](https://www.flux.ai/lcsc/tpa3116d2dad~g4x.md) - Part Type: Integrated Circuit - LCSC Part Number: C2865736 - Datasheet URL: https://www.ti.com/lit/ds/symlink/tpa3116d2.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1779291613375&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Ftpa3116d2 - Manufacturer Part Number: TPA3116D2DAD - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric - Part Type: Audio Power OpAmps - JLCPCB Part Class: Extended Part - Package or Case Code: HTSSOP-32_L11.0-W6.1-P0.65-LS8.1-BL **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/jharwinbarrozo/high-fidelity-class-d-audio-amplifier-5qbft~ht0](https://www.flux.ai/jharwinbarrozo/high-fidelity-class-d-audio-amplifier-5qbft~ht0).* --- *Generated from [https://www.flux.ai/jharwinbarrozo/high-fidelity-class-d-audio-amplifier-5qbft~ht0](https://www.flux.ai/jharwinbarrozo/high-fidelity-class-d-audio-amplifier-5qbft~ht0)*