UnfolderBuffer
About the UnfolderBuffer PCB
UnfolderBuffer is an open source PCB design by kefernandez, published on GitHub. It is a 4-layer board measuring 135 × 92 mm, with 180 components from 70 distinct parts.
Other key parts include the SI8274GB1-IM1, TLV760, LT1990, REF3012 and LTC1144. By type, the board carries 76 capacitors, 38 resistors, 25 test points, 17 ICs, 17 inductors and 5 connectors.
Main components on the UnfolderBuffer
UnfolderBuffer bill of materials (BOM)
180 components, 70 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SI8274GB1-IM1 TLV760_3.3V | SOT-23 | U1 |
| 1 | SI8274GB1-IM1 LTC2050_+ | SOT-23-5 | U2 |
| 1 | TLV760 | SOT-23 | U3 |
| 3 | LT1990 | SOIC-8 | U4, U7, U17 |
| 3 | REF3012 | SOT-23 | U5, U6, U16 |
| 1 | LTC1144 | SOIC-8 | U8 |
| 1 | FullBridgeCell | Buffer Full Bridge | U9 |
| 2 | LM2937xMP | SOT223-4 | U10, U13 |
| 2 | ADuM5010 | SSOP-20_Wide | U11, U14 |
| 1 | Si8271 | SOIC-8 | U12 |
| 1 | TPS562200 | SOT-23-6 | U15 |
| 1 | EPC2033 NFET_GaNSystems | GS66506T | Q1 |
| 2 | Conn_01x02 | MTA156_2pin | J1, J2 |
| 1 | Conn_01x02 | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | HSEC8-160-1-L-DV-A-BL | SAMTEC_HSEC8-160-01-L-DV-A-BL | J4 |
| 1 | HSEC8-130-01-L-DV-A | SKT-60_flipped | J5 |
| 4 | TP | Banana_Jack_1Pin | TP1, TP2, TP3, TP4 |
| 21 | TestPoint | 0603 TP | TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12 +13 |
| 1 | VS-1EFH02HM3/I D | D_SMB | D1 |
| 2 | Bead | R_0603 | L1, L2 |
Show 50 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 9 | Ferrite | C_0603 | L3, L4, L5, L6, L11, L12, L14, L15 +1 |
| 3 | 47uH | XAL7070 | L7, L8, L17 |
| 1 | 100uH | MSS1210 | L9 |
| 1 | 4.7uH | XEL4030 | L10 |
| 1 | 100uH | XAL7070 | L13 |
| 1 | CL05B105KQ5NQNC C1_sense | C_1210 | C1 |
| 1 | C0603C105K4RACTU C1_sense | C_1210 | C2 |
| 1 | 0402YC101KAT2A C2_sense | C_1210 | C3 |
| 1 | C0603C105K4RACTU 1uF | C_1206 | C4 |
| 3 | CL10A226MQ8NRNC 1uF | C_0603 | C5, C6, C9 |
| 1 | CL10A226MQ8NRNC 1000pF | C_0603 | C7 |
| 1 | C0603C105K4RACTU 1uF | C_0603 | C8 |
| 1 | 0402YC101KAT2A 10uF | C_0805 | C10 |
| 1 | C0603C105K4RACTU 100pF | C_0603 | C11 |
| 1 | CL05B105KQ5NQNC 1uF | C_0603 | C12 |
| 5 | 10uF | C_0805 | C13, C19, C24, C70, C74 |
| 17 | 1uF | C_0603 | C14, C15, C16, C17, C18, C20, C22, C23 +9 |
| 6 | 100pF | C_0603 | C21, C57, C58, C67, C72, C75 |
| 2 | 10uF | C_0603 | C25, C28 |
| 11 | 10uF | C_1206 | C27, C29, C31, C35, C36, C42, C44, C48 +3 |
| 2 | 0.1uF | C_1206 | C30, C43 |
| 7 | 0.1uF | C_0603 | C33, C34, C46, C47, C50, C51, C53 |
| 1 | 100pF | C_0402 | C37 |
| 1 | 1uF | C_0402 | C38 |
| 1 | 0.1uF | C_0402 | C39 |
| 6 | 1uF | C_1206 | C40, C41, C60, C61, C76, C77 |
| 2 | 22uF | C_1206 | C52, C55 |
| 1 | C2_sense | C_1210 | C62 |
| 2 | 1uF | C_1210 | C63, C64 |
| 2 | RP73PF1E35K7BTD 470k | R_1206 | R1, R3 |
| 1 | RP73PF1E150RBTD 470k | R_1206 | R2 |
| 1 | MCS04020C1003FE000 10k | R_0603 | R4 |
| 1 | 541-0.0J 33k | R_0603 | R5 |
| 3 | ERJ-PA2F15R0X 33k | R_0603 | R6, R8, R9 |
| 1 | ERJ-PA2F15R0X 2k | R_0603 | R7 |
| 1 | 541-0.0J 150k | R_1206 | R10 |
| 1 | MCS04020C1003FE000 150k | R_1206 | R11 |
| 2 | 2k | R_0603 | R12, R35 |
| 1 | RP73PF1E150RBTD 16k | R_0805 | R13 |
| 1 | 16k | R_0805 | R14 |
| 2 | 10k | R_0603 | R15, R16 |
| 2 | 30.9k | R_0402 | R17, R23 |
| 2 | 9.53k | R_0402 | R18, R24 |
| 1 | 150 | R_0402 | R19 |
| 2 | 0 | R_0402 | R20, R32 |
| 1 | 15 | R_0402 | R21 |
| 3 | 10k | R_0402 | R22, R26, R27 |
| 1 | 54.9k | R_0402 | R25 |
| 5 | 499 | R_0402 | R28, R29, R30, R31, R38 |
| 4 | 33k | R_0603 | R33, R34, R36, R37 |
UnfolderBuffer design files
The KiCad project lives in the kefernandez/SSB_ChargeInjection repository on GitHub; these links point at the commit this page was built from.
UnfolderBuffer: common questions
How big is the UnfolderBuffer PCB?
The UnfolderBuffer measures 135 × 92 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the UnfolderBuffer?
180 components, from 70 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 UnfolderBuffer design files?
From the kefernandez/SSB_ChargeInjection repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the UnfolderBuffer design in my own project?
The repository has no license, so all rights stay with kefernandez. Use it as a reference, and ask the author before reusing the design.
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