Switched Mode Power Supply

3 years ago 4007
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

This circuit was "reverse engineered" from a cheap 5V USB charger circuit. Voltage regulation is by a zener diode and opto-isolator coupling the primary and secondary. The circuit includes 4 zener diode models from 2.4 to 5.1V

The aim of the project was to explore how SMPSs operate These are good primers http://mmcircuit.com/understand-rcc-smps/ http://www.ecircuitcenter.com/Circuits/smps_buck/smps_buck.htm

Experiment with changing Bf, Rload, Lpri . . .

Similar circuits are http://i.stack.imgur.com/i99WG.png http://www.next.gr/uploads/79/201142264630267.gif http://www.seekic.com/uploadfile/ic-circuit/s20113302203978.gif

Documents

SMPS_full_sim_v7

SMPS_full_sim_v8

Voltage controlled current shunt

SMPS_full_sim_v9

optoisolator

SMPS_full_sim_v10

BOM

ID Designator Quantity
1 L1 1
2 L3,L2 2
3 C1 1
4 B1 1
5 R1,R8,R10 3
6 C2,C3,C7 3
7 VIFILT,VIFILT2,VIFILT3 3
8 D2 1
9 R2 1
10 Q1 1
11 R4 1
12 C6 1
13 C4 1
14 R5 1
15 R6,R9 2
16 V1 1
17 Q2 1
18 U1 1
19 R3,R9,R7,R1,R4 5
20 C5 1
21 D1 1
22 D3 1
23 B2 1
24 V2,V3,V4 3
25 B3 1
26 S1,S2 2
27 V5 1
28 V7,V6 2
29 R7 1
30 R11,R13,R6 3
31 C1 1
32 C6 1
33 D3 1
34 RLOAD 1
35 U1 1
36 R1,R3,R5 3
37 R2,R12,R3 3
38 V1 1
39 C1 1
40 RLOAD 1
41 U2 1
42 R11 1
43 R2 1
44 V1 1

Attachments

None

Members

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Comments (1)

martin garix (martin) Reply

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