# Fragile Black Sonic Screwdriver ## Description 300 W universal-input isolated offline SMPS based on a modified ATX-style architecture. Universal 115-230 VAC, 50/60 Hz input via fused IEC C14 inlet. Outputs: +12 V at 20 A, +5 V at 14 A, +3.3 V at 12 A, +5 Vsb at 2.5 A, and -12 V at 0.3 A. Includes primary rectification with GBU806 bridge, bulk capacitors, bleeders, snubbers, main PWM and driver transformer, standby flyback, optocoupler and TL431 feedback, supervisor logic, test points, fan and heatsink provisions, and 2-layer FR-4 PCB layout with 8 mm primary-secondary isolation and heavy copper routing on high-current rails. ## Project Details - **Owner:** drisnz - **Created:** 3/23/2026 - **Last Updated:** 3/25/2026 - **Visibility:** Public - **Output Power:** 300 W - **Board Stackup:** 2-layer FR-4, 2 oz copper on high-current rails - **Isolation Requirement:** 8 mm minimum primary-secondary clearance/creepage target on PCB - **Input Voltage:** 115-230 VAC, 50/60 Hz - **System Architecture:** ```mermaid flowchart TD AC[AC Input IEC C14] --> EMI[EMI Filter Fuse NTC MOV] EMI --> BR[Bridge Rectifier D1 GBU806] BR --> BULK[HV Bulk Caps and Bleeders] BULK --> HB[Half Bridge Q1 Q2] HB --> DRV[EE16 Driver Transformer] HB --> TX[ER35 Main Transformer] BULK --> STBY[TNY276P Standby Flyback] STBY --> VSB[5VSB Rail] TX --> SEC12[12V Rectifier and Filter] TX --> SEC5[5V Rectifier and Filter] TX --> SEC33[3.3V Rectifier and Filter] STBY --> NEG12[-12V Auxiliary Rail] SEC12 --> OUT[ATX Output and Fan] SEC5 --> OUT SEC33 --> OUT VSB --> OUT NEG12 --> OUT SEC5 --> FB[TL431 and PC817 Feedback] FB --> PWM[TL494 PWM Controller] PWM --> DRV SUP[LM339 Supervisor] --> PWM ``` ## Key Components ### D1 — [GBU806](https://www.flux.ai/adrian95/gbu806~apr.md) - Role Details: Primary bridge rectifier for 115/230 VAC input - Manufacturer Name: Taiwan Semiconductor Corporation - Manufacturer Part Number: GBU806 - Package: GBU - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/GBU801%20SERIES_M2103.pdf - Role: Rectification - Part Type: Diode **Pins:** - - [pin 1] - + [pin 4] - ~_1 [pin 2] - ~_2 [pin 3] ### D2 — [MBR3060PT](https://www.flux.ai/lcsc/mbr3060pt~gznq.md) - Package or Case Code: TO-247-3_L15.9-W5.1-P5.44-L - Role: Output Rectifier - Manufacturer Name: onsemi - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_ON-Semicon_MBR3060PT_ON-Semicon-ON-MBR3060PT_C274650.html - Role Details: High-current +12V Schottky rectifier - Part Type: Schottky Barrier Diodes (SBD) - Manufacturer Part Number: MBR3060PT - JLCPCB Part Class: Extended Part - LCSC Part Number: C274650 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010100_onsemi-MBR3060PT_C274650.pdf - Package: TO-247 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D3 — [MBR3045PT_T0_10001](https://www.flux.ai/lcsc/mbr3045ptt010001~52ad.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_PANJIT-International-MBR3045PT-T0-10001_C131472.pdf - Package or Case Code: TO-3P-3_L15.8-W4.8-P5.45-L - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_PANJIT_MBR3045PT_MBR3045PT_C131472.html - Part Type: Schottky Barrier Diodes (SBD) - Role Details: High-current +5V Schottky rectifier - JLCPCB Part Class: Extended Part - Manufacturer Name: PANJIT(强茂) - Manufacturer Part Number: MBR3045PT_T0_10001 - Package: TO-3P - Role: Output Rectifier - LCSC Part Number: C131472 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D4 — [MBR2045CT](https://www.flux.ai/adrian95/mbr2045ct~ksy.md) - Part Type: Diode - Manufacturer Name: Diodes Incorporated - Role Details: High-current +3.3V Schottky rectifier - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/793/MBR%28F%292045CT-2060CT.pdf - Package: TO-220 - Manufacturer Part Number: MBR2045CT - Role: Output Rectifier - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A1 [pin 1] - A2 [pin 3] - KCASE [pin 2] ### D5 — [FR107](https://www.flux.ai/lcsc/fr107~9t9m.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811141141_HL-Haolin-Elec-FR107_C237254.pdf - Role: Auxiliary Rectifier - Role Details: -12V rail rectifier diode - LCSC Part Number: C237254 - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_HL-FR107_C237254.html - Package or Case Code: DO-41_BD2.4-L4.7-P8.70-D0.9-RD - Manufacturer Part Number: FR107 - Part Type: Diodes - General Purpose - JLCPCB Part Class: Extended Part - Manufacturer Name: HL(豪林) - Package: DO-41 **Pins:** - A [pin 2] - K [pin 1] ### D6 — [FR107](https://www.flux.ai/lcsc/fr107~9t9m.md) - Package or Case Code: DO-41_BD2.4-L4.7-P8.70-D0.9-RD - Role: Auxiliary Rectifier - Product Info Url: https://lcsc.com/product-detail/Diodes-General-Purpose_HL-FR107_C237254.html - LCSC Part Number: C237254 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811141141_HL-Haolin-Elec-FR107_C237254.pdf - Role Details: -12V rail rectifier diode - Manufacturer Name: HL(豪林) - Package: DO-41 - Part Type: Diodes - General Purpose - JLCPCB Part Class: Extended Part - Manufacturer Part Number: FR107 **Pins:** - A [pin 2] - K [pin 1] ### D7 — [1N5822](https://www.flux.ai/adrian95/1n5822~4xv.md) - Manufacturer Name: STMicroelectronics - Part Type: Diode - Datasheet URL: https://www.mouser.com/datasheet/2/268/LDS_0303-1592924.pdf - Role Details: 5VSB Schottky output rectifier - Manufacturer Part Number: 1N5822 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Standby Rectifier - Package: DO-201AD **Pins:** - A [pin 2] - K [pin 1] ### J1 — [Pin Header 01x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md) - Role Details: 3-pin fan connector for thermal management - Role: Fan Header - Package: PinHeader_1x03 - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### OC1 — [PC817X2NSZ9F](https://www.flux.ai/adrian95/pc817x2nsz9f~gjb.md) - Role Details: Primary-secondary regulation feedback optocoupler - Mouser Part Number: 859-PC817X2NSZ9F - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Role: Feedback Isolation - Digi-Key Part Number: 425-2575-5-ND - Datasheet URL: http://www.socle-tech.com/doc/IC%20Channel%20Product/Optoelectronic%20Components/Photocoupler/PC817X_NSZ9FSeries_SPEC.pdf - Package: DIP-4 - Manufacturer Part Number: PC817X2NSZ9F - Manufacturer Name: Socle Technology **Pins:** - ANODE [pin 1] - CATHODE [pin 2] - COLLECTOR [pin 4] - EMITTER [pin 3] ### OC2 — [PC817X2NSZ9F](https://www.flux.ai/adrian95/pc817x2nsz9f~gjb.md) - Manufacturer Name: Socle Technology - Manufacturer Part Number: PC817X2NSZ9F - Role Details: Fault or power-good isolated signaling - Datasheet URL: http://www.socle-tech.com/doc/IC%20Channel%20Product/Optoelectronic%20Components/Photocoupler/PC817X_NSZ9FSeries_SPEC.pdf - Role: Protection Isolation - License: https://creativecommons.org/licenses/by/4.0/ - Digi-Key Part Number: 425-2575-5-ND - Mouser Part Number: 859-PC817X2NSZ9F - Package: DIP-4 - Part Type: Transistor **Pins:** - ANODE [pin 1] - CATHODE [pin 2] - COLLECTOR [pin 4] - EMITTER [pin 3] ### OC3 — [PC817X2NSZ9F](https://www.flux.ai/adrian95/pc817x2nsz9f~gjb.md) - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Package: DIP-4 - Manufacturer Part Number: PC817X2NSZ9F - Role: Standby Feedback Isolation - Manufacturer Name: Socle Technology - Datasheet URL: http://www.socle-tech.com/doc/IC%20Channel%20Product/Optoelectronic%20Components/Photocoupler/PC817X_NSZ9FSeries_SPEC.pdf - Mouser Part Number: 859-PC817X2NSZ9F - Digi-Key Part Number: 425-2575-5-ND - Role Details: 5VSB isolated regulation feedback **Pins:** - ANODE [pin 1] - CATHODE [pin 2] - COLLECTOR [pin 4] - EMITTER [pin 3] ### Q1 — [MJE13009G](https://www.flux.ai/adrian95/mje13009g~npq.md) - Mouser Part Number: 863-MJE13009G - Manufacturer Name: onsemi - Manufacturer Part Number: MJE13009G - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mje13009-d.pdf - Role: Primary Switch - Digi-Key Part Number: MJE13009GOS-ND - Package: TO-220 - Role Details: Upper half-bridge NPN switch, through-hole and US-distributor stocked - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 2] - E [pin 3] ### Q2 — [MJE13009G](https://www.flux.ai/adrian95/mje13009g~npq.md) - Role: Primary Switch - License: https://creativecommons.org/licenses/by/4.0/ - Mouser Part Number: 863-MJE13009G - Digi-Key Part Number: MJE13009GOS-ND - Package: TO-220 - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mje13009-d.pdf - Role Details: Lower half-bridge NPN switch, through-hole and US-distributor stocked - Manufacturer Name: onsemi - Manufacturer Part Number: MJE13009G **Pins:** - B [pin 1] - C [pin 2] - E [pin 3] ### T1 — [TEZ16.0-D-2](https://www.flux.ai/kicad-part-library/tez16p0-d-2~exu.md) - Manufacturer Part Number: TEZ16.0-D-2 - Role Details: ER35 placeholder with one primary and two secondary windings - Datasheet URL: http://www.breve.pl/pdf/ANG/TEZ_ang.pdf - Part Type: Transformer THT - Package or Case Code: Transformer_Breve_TEZ-47x57 - Role: Main Transformer - Package: Transformer-6pin **Pins:** - ~ [pin 9] - ~ [pin 13] - ~ [pin 7] - ~ [pin 14] - ~ [pin 8] - ~ [pin 1] ### T2 — [TEZ16.0-D-2](https://www.flux.ai/kicad-part-library/tez16p0-d-2~exu.md) - Datasheet URL: http://www.breve.pl/pdf/ANG/TEZ_ang.pdf - Manufacturer Part Number: TEZ16.0-D-2 - Package: Transformer-6pin - Role Details: EE16 placeholder with one primary and two secondary windings - Package or Case Code: Transformer_Breve_TEZ-47x57 - Part Type: Transformer THT - Role: Drive Transformer **Pins:** - ~ [pin 9] - ~ [pin 13] - ~ [pin 7] - ~ [pin 14] - ~ [pin 8] - ~ [pin 1] ### T3 — [2-E](https://www.flux.ai/lcsc/2-e~biou.md) - Part Type: Current Sense Transformers - LCSC Part Number: C3034723 - Manufacturer Part Number: TVA2/2-E - Package: Transformer-4pin - Role: Standby Transformer - Manufacturer Name: 择明朗熙 - Package or Case Code: XFMR-TH_TVA2-2-E - Role Details: EE19 placeholder with one primary and one secondary winding **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### TP1 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Role: Test Point - Manufacturer Part Number: 1040 - Part Type: Connectors - Role Details: HV DC bus measurement point - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Package: THT Test Point - Manufacturer Name: Keystone **Pins:** - TP [pin TP] ### TP2 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Manufacturer Name: Keystone - Role: Test Point - Package: THT Test Point - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Role Details: +12V rail measurement point - Part Type: Connectors - Manufacturer Part Number: 1040 **Pins:** - TP [pin TP] ### TP3 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Manufacturer Name: Keystone - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Manufacturer Part Number: 1040 - Role: Test Point - Part Type: Connectors - Role Details: +5V rail measurement point - Package: THT Test Point **Pins:** - TP [pin TP] ### TP4 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Package: THT Test Point - Manufacturer Name: Keystone - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Role: Test Point - Manufacturer Part Number: 1040 - Part Type: Connectors - Role Details: +3.3V rail measurement point **Pins:** - TP [pin TP] ### TP5 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Role Details: +5VSB rail measurement point - Manufacturer Part Number: 1040 - Part Type: Connectors - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Role: Test Point - Package: THT Test Point - Manufacturer Name: Keystone **Pins:** - TP [pin TP] ### TP6 — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Manufacturer Name: Keystone - Package: THT Test Point - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf - Part Type: Connectors - Manufacturer Part Number: 1040 - Role: Test Point - Role Details: -12V rail measurement point **Pins:** - TP [pin TP] ### U1 — [TL494N](https://www.flux.ai/lcsc/tl494n~m71z.md) - Mouser Part Number: 595-TL494CN - Manufacturer Part Number: TL494CN - Package: DIP-16 - Digi-Key Part Number: 296-1390-5-ND - Role: PWM Control - Package or Case Code: DIP-16_L19.8-W6.5-P2.54-LS7.6-BL - LCSC Part Number: C596329 - JLCPCB Part Class: Extended Part - Manufacturer Name: Texas Instruments - Role Details: Main half-bridge PWM controller, through-hole and US-distributor stocked - Part Type: AC-DC Controllers & Regulators **Pins:** - C1 [pin 8] - C2 [pin 11] - CT [pin 5] - DEAD-TIME [pin 4] - E1 [pin 9] - E2 [pin 10] - FB [pin 3] - GND [pin 7] - INVINPUT1 [pin 2] - INVINPUT2 [pin 15] - NONINVINPUT1 [pin 1] - NONINVINPUT2 [pin 16] - OUTPUT [pin 13] - REF-OUT [pin 14] - RT [pin 6] - VCC [pin 12] ### U2 — [TL431AIL3T](https://www.flux.ai/adrian95/tl431ail3t~xnq.md) - Role Details: Secondary shunt regulator driving optocoupler - Package: SOT-23-3 - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/2d/27/af/41/03/e2/44/8e/CD00000986.pdf/files/CD00000986.pdf/jcr:content/translations/en.CD00000986.pdf - Role: Feedback Reference - Part Type: Integrated Circuit - Manufacturer Name: STMicroelectronics - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TL431AIL3T **Pins:** - A [pin 3] - K [pin 1] - REF [pin 2] ### U3 — [LM339N](https://www.flux.ai/lcsc/lm339n~01eu.md) - Digi-Key Part Number: 296-13989-5-ND - Role: Supervisor - Manufacturer Part Number: LM339NE3 - LCSC Part Number: C725324 - Product Info Url: https://lcsc.com/product-detail/Analog-Comparators_HGSEMI-LM339N_C725324.html - Package: DIP-14 - Package or Case Code: DIP-14_L19.0-W7.0-P2.54-LS7.6-BL - JLCPCB Part Class: Extended Part - Part Type: Comparators - Manufacturer Name: Texas Instruments - Mouser Part Number: 595-LM339NE3 - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_HGSEMI-LM339N_C725324.pdf - Role Details: Comparator supervisor, through-hole and US-distributor stocked **Pins:** - 1IN- [pin 6] - 1IN+ [pin 7] - 1OUT [pin 1] - 2IN- [pin 4] - 2IN+ [pin 5] - 2OUT [pin 2] - 3IN- [pin 8] - 3IN+ [pin 9] - 4IN- [pin 10] - 4IN+ [pin 11] - GND [pin 12] - OUT3 [pin 14] - OUT4 [pin 13] - VCC [pin 3] ### U4 — [TNY276PG](https://www.flux.ai/lcsc/tny276pg~tjas.md) - Manufacturer Part Number: TNY276PG - Part Type: Pre-ordered Products - LCSC Part Number: C568055 - Package or Case Code: DIP-8_7P-L9.7-W6.4-P2.54-LS7.6-BL-PE3 - Role: Standby PWM - Role Details: Auxiliary 5VSB offline flyback controller - Package: DIP-8 - Manufacturer Name: Power Integrations **Pins:** - BP/M [pin 2] - D [pin 4] - EN/UV [pin 1] - S [pin 5] - S [pin 8] - S [pin 7] - S [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/drisnz/fragile-black-sonic-screwdriver~ko](https://www.flux.ai/drisnz/fragile-black-sonic-screwdriver~ko).* --- *Generated from [https://www.flux.ai/drisnz/fragile-black-sonic-screwdriver~ko](https://www.flux.ai/drisnz/fragile-black-sonic-screwdriver~ko)*