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Std Edition1.25V - 27.5V 1A Buck-Linear PSU
Profile:.
License: Public Domain
This is a PCB for a previous project that I did. (The circuit and the PCB's thumbnails are wrong, but when you click on 'open in editor', the correct circuit and PCB open.) For more details, check https://easyeda.com/prathikprashanth/pbl-sem-5-buck-linear-voltage-regulator
The exposed copper surfaces that you see are for heatsinking. Instead of using an actual heatsink, this is a good way of creating a 'PCB heaksink' and is typically done for surface mount components, but it can be done for through hole components as well, giving the circuit a low-profile look.
****Short circuit test****
****Scope Captures****
ID | Name | Designator | Footprint | Quantity |
---|---|---|---|---|
1 | 1N5819 | D1 | DO-41_BD2.4-L4.7-P8.70-D0.9-FD | 1 |
2 | 2N3906 | Q3 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
3 | 10k | R12 | TRIMMER_BOURNS_3250W | 1 |
4 | TL431ACLP | U4 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
5 | 2N3904 | Q1 | TO-92-3_L5.1-W4.1-P1.27-L | 1 |
6 | LM2596T-5.0 | U2 | TO-220-5L_L10.2-W4.5-P1.71-L | 1 |
7 | 33u | L1 | L_AXIAL-0.4 | 1 |
8 | 1N4148 | D2 | DO-35_BD2.0-L4.0-P8.00-D0.5-FD | 1 |
9 | LM317AT | U1 | TO-220-3_L10.0-W4.5-P2.54-T | 1 |
10 | 100u | C8,C3,C5 | CAP-D8.0×F3.5 | 3 |
11 | 56k | R3 | R_AXIAL-0.4 | 1 |
12 | 2.2k | R4 | R_AXIAL-0.4 | 1 |
13 | 560R | R7 | R_AXIAL-0.4 | 1 |
14 | 1k | R8 | R_AXIAL-0.4 | 1 |
15 | 10R | R2,R5,R6,R9,R10 | R_AXIAL-0.4 | 5 |
16 | 470R | R1 | R_AXIAL-0.4 | 1 |
17 | 10u | C7,C1,C2 | RAD-0.1 | 3 |
18 | 100n | C4 | RAD-0.1 | 1 |
Unfold