Main supply 3
About the Main supply 3 PCB
Main supply 3 is an open source PCB design by Thinkpad4by3, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 186 components from 58 distinct parts.
Other key parts include the LM5155DSSR, TLV314QDBVR, PC817, TL431DBZ and AP2204K-5.0. By type, the board carries 77 resistors, 58 capacitors, 16 diodes, 11 ICs, 8 connectors and 4 transistors.
From the project
Electrostatic CRT driver designed from the ground up for performance, versatility and ease-of-manufacturability
Another reasons for ditching the LM5180 was due to was due to wanting variable output voltage, and the LM5180 uses a single resistor Rfb to determine this voltage. Not just did this require alot of tweaking, but provided no good method for changing the voltage with some level of signal control. Going back to a more conventional resistor divider style gave plenty of known proven options for this.
Main components on the Main supply 3
Main supply 3 bill of materials (BOM)
186 components, 58 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | LM5155DSSR | IC_LM5155DSSR | U1, U3, U5 |
| 3 | TLV314QDBVR | SOT-23-5 | U2, U10, U11 |
| 1 | PC817 | DIP-4_W7.62mm | U4 |
| 1 | TL431DBZ | SOT-23 | U6 |
| 2 | AP2204K-5.0 | SOT-23-5 | U7, U8 |
| 1 | AMC1311 | SOIC-8_7.5x5.85mm_P1.27mm | U9 |
| 3 | CSD19537Q3 | VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q1, Q2, Q3 |
| 1 | STN0214 | SOT-223-3_TabPin2 | Q4 |
| 1 | CONN_01X02_PIN Conn_01x02_Pin | Molex_KK-396_5273-02A_1x02_P3.96mm_Vertical | J1 |
| 1 | A3_EN | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | C81276 A3 | PinHeader_1x01_P2.54mm_Vertical | J3 |
| 1 | C81276 A2 | PinHeader_1x01_P2.54mm_Vertical | J4 |
| 1 | A3_EN A2_EN | PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | A3_EN FIL_EN | PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | C239396 FIL CAT FOCUS | Molex_KK-396_5273-05A_1x05_P3.96mm_Vertical | J7 |
| 1 | A3_EN Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | C1972452 Fuse | Fuse_0805_2012Metric | F1 |
| 3 | 0.002 | R_1206_3216Metric | RS1, RS2, RS3 |
| 1 | 1MEG 1Meg | Potentiometer_Bourns_3296W_Vertical | RV1 |
| 4 | 4.7K 4.7k | Potentiometer_Bourns_3296W_Vertical | RV2, RV3, RV4, RV5 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | ~ | NA5920-AL | T1, T2 |
| 1 | YA9033-ALD | XFMR_YA9033-ALD | T3 |
| 5 | LED | LED_0603_1608Metric | D1, D8, D14, D16, D18 |
| 11 | C5387 D | D_SMA | D2, D3, D5, D6, D7, D9, D10, D11 +3 |
| 5 | 220P 220p | C_0603_1608Metric | C1, C12, C20, C27, C30 |
| 12 | 10U 10u | C_0805_2012Metric | C2, C3, C21, C22, C32, C33, C35, C36 +4 |
| 6 | 220N 220n | C_2220_5750Metric | C4, C6, C8, C17, C19, C23 |
| 10 | 100N 100n | C_0603_1608Metric | C5, C24, C31, C44, C45, C46, C47, C50 +2 |
| 4 | 100N 100n | C_1812_4532Metric | C7, C9, C16, C18 |
| 3 | 470P 470p | C_0603_1608Metric | C10, C25, C38 |
| 4 | 1u | C_0603_1608Metric | C11, C26, C39, C57 |
| 3 | 47N 47n | C_0603_1608Metric | C13, C28, C41 |
| 2 | 22N 22n | C_0603_1608Metric | C14, C29 |
| 2 | 100P 100p | C_0603_1608Metric | C15, C53 |
| 1 | 100U 100u | CP_Elec_6.3x7.7 | C34 |
| 2 | 220N 220n | C_0603_1608Metric | C37, C40 |
| 3 | 1n | C_0603_1608Metric | C52, C55, C56 |
| 1 | 1n | C_1206_3216Metric | C54 |
| 1 | 3.9K 3.9k | R_0603_1608Metric | R1 |
| 7 | 50K 50k | R_0603_1608Metric | R2, R3, R27, R29, R47, R49, R60 |
| 3 | 100 | R_0603_1608Metric | R4, R30, R48 |
| 6 | 20 | R_1206_3216Metric | R5, R6, R9, R24, R25, R28 |
| 3 | 0 | R_0603_1608Metric | R7, R31, R53 |
| 3 | 20 | R_0603_1608Metric | R8, R32, R56 |
| 3 | 2k | R_0603_1608Metric | R10, R33, R58 |
| 2 | 22K 22k | R_0603_1608Metric | R11, R34 |
| 3 | 100K 100k | R_0603_1608Metric | R12, R36, R68 |
| 27 | 1MEG 1Meg | R_1206_3216Metric | R13, R14, R16, R17, R18, R19, R20, R21 +19 |
| 2 | 470 | R_0603_1608Metric | R15, R46 |
| 1 | 4.7K 4.7k | R_0603_1608Metric | R23 |
| 1 | 3.9K 4k | R_0603_1608Metric | R26 |
| 4 | 1k | R_0603_1608Metric | R50, R54, R55, R57 |
| 1 | 33K 33k | R_0603_1608Metric | R51 |
| 2 | 5k | R_0603_1608Metric | R52, R73 |
| 1 | 20K 20k | R_0603_1608Metric | R59 |
| 1 | 6.8K 6.8k | R_0603_1608Metric | R67 |
| 5 | 10K 10k | R_0603_1608Metric | R69, R72, R75, R76, R77 |
| 1 | 100K 100k | R_1206_3216Metric | R71 |
Main supply 3 design files
The KiCad project lives in the Thinkpad4by3/chibitron repository on GitHub; these links point at the commit this page was built from.
Main supply 3: common questions
How big is the Main supply 3 PCB?
The Main supply 3 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Main supply 3?
186 components, from 58 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Main supply 3 design files?
From the Thinkpad4by3/chibitron repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Main supply 3 design in my own project?
The repository has no license, so all rights stay with Thinkpad4by3. Use it as a reference, and ask the author before reusing the design.
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