# High-Fidelity Class-D Audio Amplifier Budget ## 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:** vasy_skral - **Created:** 4/2/2026 - **Last Updated:** 5/5/2026 - **Visibility:** Public ## Key Components ### AM0 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P - Part Type: Mechanical **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) - Part Type: Mechanical - Manufacturer Part Number: PZ254V-11-02P - 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) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Aliexpress - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - Exclude from BOM: false - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector **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) - Part Type: Mechanical - Exclude from BOM: false - Manufacturer Part Number: PZ254V-11-02P **Pins:** - A [pin 1] - B [pin 2] ### JP3 — [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] ### JP4 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Part Type: Mechanical - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### JP5 — [Jumper 2 Open](https://www.flux.ai/vasy_skral/jumper-2-open~muk.md) - Part Type: Mechanical - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false **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 - Manufacturer Part Number: PZ254V-11-02P - Exclude from BOM: false **Pins:** - A [pin 1] - B [pin 2] ### LEFT — [KF301-5.0-2P](https://www.flux.ai/jecstronic/kf301-50-2p~99i.md) - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector - Exclude from BOM: false - 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/ **Pins:** - P1 [pin 1] - P2 [pin 2] ### LIN — [RCJ-017](https://www.flux.ai/lcsc/rcj-017~c34d.md) - LCSC Part Number: C22359757 - Package or Case Code: CONN-TH_RCJ-013 - Manufacturer Name: CUI - JLCPCB Part Class: Extended Part - Manufacturer Part Number: RCJ-017 **Pins:** - 2 [pin 2] - A1 [pin 1] - B1 [pin 3] - C1 [pin 4] ### Q1 — [MMBT2222A,215](https://www.flux.ai/adrian95/mmbt2222ac215~dx8.md) - Part Type: Transistor - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/MMBT2222A.pdf - Manufacturer Part Number: MMBT2222A,215 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Nexperia USA Inc. **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) - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - Manufacturer Name: Aliexpress - Exclude from BOM: false - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### RIN — [RCJ-017](https://www.flux.ai/lcsc/rcj-017~c34d.md) - LCSC Part Number: C22359757 - Package or Case Code: CONN-TH_RCJ-013 - Manufacturer Part Number: RCJ-017 - JLCPCB Part Class: Extended Part - Manufacturer Name: CUI **Pins:** - 2 [pin 2] - A1 [pin 1] - B1 [pin 3] - C1 [pin 4] ### RV1 — [TC33X-2-104E](https://www.flux.ai/lcsc/tc33x-2-104e~kbaz.md) - Manufacturer Name: BOURNS - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TC33X-2-104E - Part Type: Variable Resistors/Potentiometers - LCSC Part Number: C719186 - 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) - Manufacturer Name: Texas Instruments - LCSC Part Number: C2865736 - Manufacturer Part Number: TPA3116D2DAD - Package or Case Code: HTSSOP-32_L11.0-W6.1-P0.65-LS8.1-BL - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Audio Power OpAmps - Symbol Style: Parametric - JLCPCB Part Class: Extended Part **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/vasy_skral/high-fidelity-class-d-audio-amplifier-budget~iz5](https://www.flux.ai/vasy_skral/high-fidelity-class-d-audio-amplifier-budget~iz5).* --- *Generated from [https://www.flux.ai/vasy_skral/high-fidelity-class-d-audio-amplifier-budget~iz5](https://www.flux.ai/vasy_skral/high-fidelity-class-d-audio-amplifier-budget~iz5)*