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STD EF95 6AK5 Battery Operated Tube Headphone Amplifier - 4S 18650 Module
Profile：EF95 6AK5 Hybrid Tube Headphone Amplifier - 4S 18650 Module
License: GPL 3.0
Description
EF95/6AK5 Tube Headphone Amplifier, it's a hybrid amplifier meaning the final amplification is done using an op-amp. The amplifier consists of a UC3843 100v booster for the tubes, an ABLIC S-8254 4s battery protection system, a LM3914 battery level meter, a TP4056 battery charger and a MH-M18 bluetooth module.
This project is battery module for this [Tube Amplifier](https://easyeda.com/Ratti3/ef95-6ak5-hybrid-tube-headphone-amplifier) project.
See other projects for additional schematics.
YouTube Video of project:
[Part 1](https://youtu.be/28DwrHB3h8w)
[Part 2](https://youtu.be/93-n6Ngaj2w)
[Part 3](https://youtu.be/hZghhSwPwPA)
Blog:
[https://ratti3.blogspot.com/2020/12/making-battery-operated-ef956ak5-hybrid.html](https://ratti3.blogspot.com/2020/12/making-battery-operated-ef956ak5-hybrid.html)
Design Drawing
schematic diagram
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EF95 6AK5 Hybrid Tube Headphone Amplifier - 4S 18650 Module
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Calculations
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PCB
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EF95 6AK5 Hybrid Tube Headphone Amplifier - 4S 18650 Module (5V)
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EF95 6AK5 Hybrid Tube Headphone Amplifier - Rear Panel
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EF95 6AK5 Hybrid Tube Headphone Amplifier - 43 18650 Module (4.6V)
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| ID | Name | Designator | Footprint | Quantity | BOM_Supplier | BOM_Supplier Part |
|---|---|---|---|---|---|---|
| 1 | LM2596T-ADJ/NOPB | U1.LM2596T-ADJ | TO-220-5_L10.5-W15.5-P1.70-TL | 1 | LCSC | C21149 |
| 2 | ZMM22 | ZD3,ZD2,ZD1 | LL-34_L3.5-W1.5-RD | 3 | LCSC | C8073 |
| 3 | MIC29300-12WT | U3.MIC29300-12WT | TO-220-3_L10.0-W4.5-P2.54-T | 1 | LCSC | C14399 |
| 4 | XH-3A | CN1,BMS_HML,CN2,CN3,CN4 | CONN-TH_XH-3A | 5 | LCSC | C2316 |
| 5 | VS-50WQ03FN-M3 | SD1 | TO-252-2_L6.6-W6.1-P4.57-LS9.9-BR-CW | 1 | LCSC | C222476 |
| 6 | 330uF | C2,C1 | CAP-TH_BD10.0-P5.00-D1.0-FD | 2 | LCSC | C276508 |
| 7 | 1N4002W | D3,D1,D2 | SOD-123F_L2.8-W1.8-LS3.7-RD | 3 | LCSC | C169542 |
| 8 | 7447471470 | L1 | 7447471470 | 1 | RS-Online | 749-8375 |
| 9 | VH-2A | 12VDCIN | CONN-TH_VH3.96-2A | 1 | LCSC | C16728 |
| 10 | Relpol DPDT 12V 8A | RL2,RL1,RL3 | RELAY-TH_G2RL-2 | 3 | RS-Online | 123-2079 |
| 11 | PH-2AK | CHG_PWR,BAT2,BAT3,BAT4,AMP_SW,BAT1 | CONN-TH_PH-2A | 6 | LCSC | C8886 |
| 12 | 22uF | C4,C3 | CAP-D6.3×F2.5 | 2 | RS-Online | 315-0940 |
| 13 | XH-2A | BMS+,BMS-,12VDC_OUT | CONN-TH_XH-2A | 3 | LCSC | C20079 |
| 14 | 1.3K | R2 | R0805 | 1 | LCSC | C144581 |
| 15 | 470R | R1 | R0805 | 1 | LCSC | C144560 |
| 16 | 18650 x2 SMT | BAT1-2,BAT3-4 | 18650 DUAL BATTERY HOLDER SMD RATTI3 | 2 | Digi-Key | 36-1048P-ND |
| 17 | HDR-M-2.54_1x4 | J2,J1 | HDR-M-2.54_1X4 | 2 | LCSC | C124378 |
| 18 | MTP125-1102S1 | H1,H2 | HDR-TH_2P-P2.54-V | 2 | LCSC | C358684 |
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