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18-36 V to isolated 5 V / 1 A planar flyback

jonahsaunders·planar-studio·examples/planar-flyback-5w/kicad/PS-FLYBACK-5W.kicad_pcb

18-36 V to isolated 5 V / 1 A planar flyback PCB layout, top view — open source board by jonahsaunders

About the 18-36 V to isolated 5 V / 1 A planar flyback PCB

18-36 V to isolated 5 V / 1 A planar flyback is an open source PCB design by jonahsaunders, published on GitHub under the MIT license. It is a 6-layer board measuring 50 × 104 mm, with 25 components from 22 distinct parts.

Other key parts include the LT8302IS8E#PBF. By type, the board carries 8 capacitors, 8 resistors, 4 diodes, 2 connectors, 1 IC and 1 fuse.

It belongs with the rf & radio designs in this gallery.

From the project

KiCad extension for the copper you can't buy as a part — design planar inductors, transformers, PCB motor stators, filters, and antennas, with electrical modeling and direct write-back to your board.

18–36 V DC → isolated 5 V / 1 A. An LT8302 regulates the output through a 4:2 planar transformer built into the six-layer PCB. The 50 × 104 mm board uses a prepared N87 core pair with a 0.21 mm center-leg gap.

A1 engineering prototype — unbuilt and untested. The electronic BOM is fully stocked in the September 30, 2026 JLCPCB snapshot. Factory process acceptance and physical qualification remain open; this is not a production release.

18-36 V to isolated 5 V / 1 A planar flyback, from the project README
From the project README

Main components on the 18-36 V to isolated 5 V / 1 A planar flyback

LT8302IS8E#PBF

18-36 V to isolated 5 V / 1 A planar flyback bill of materials (BOM)

25 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LT8302IS8E#PBF
Analog Devices
U1
1
KF301-5.0-2P
18-36 V DC
Cixi Kefa
J1
1
KF301-5.0-2P
5 V / 1 A isolated
Cixi Kefa
J2
1
SF-1206F100-2
1 A / 63 V DC fast
Bourns
F1
1
PS-MAG-001 A0
PLANAR 4:2 / Lm 12uH
Prepared core assembly to drawing
T1
2
DFLS1100-7
Diodes Incorporated
D1, D3
1
PDS835L-13
Diodes Incorporated
D2
1
SMAJ12A-13-F
Diodes Incorporated
D4
2
CL32B106KBJNNNE
10u 50V X7R
Samsung Electro-Mechanics
C1, C2
2
16SVPF180M
180u 16V
Panasonic
C3, C8
1
CL32B226KOJNNNE
22u 16V X7R
Samsung Electro-Mechanics
C4
1
GRM188R61C475KE11D
4.7u / 16 V X5R
Murata
C5
1
CC0805JRNPO0BN471
470p / 100 V C0G
Yageo
C6
1
EEHZC1J470P
47u / 63 V
Panasonic
C7
1
RC0603FR-07649KL
649k 1%
Yageo
R1
1
RC0603FR-0761K9L
61.9k 1%
Yageo
R2
1
RT0603BRD07113KL
113k 0.1%
Yageo
R3
1
RT0603BRD0710K7L
10.7k 0.1%
Yageo
R4
1
RT0603BRD07127KL
127k 0.1%
Yageo
R5
1
SR1206FR-7T39RL
39R 0.75 W
Yageo
R6
Show 2 more
QtyPartRefs
1
RC1206FR-07220RL
220R 0.25 W
Yageo
R7
1
CRM2512-JW-2R2ELF
2.2R 2 W
Bourns
R8

18-36 V to isolated 5 V / 1 A planar flyback design files

The KiCad project lives in the jonahsaunders/planar-studio repository on GitHub; these links point at the commit this page was built from.

18-36 V to isolated 5 V / 1 A planar flyback: common questions

How big is the 18-36 V to isolated 5 V / 1 A planar flyback PCB?

The 18-36 V to isolated 5 V / 1 A planar flyback measures 50 × 104 mm, has 6 copper layers and is 1.618 mm thick.

How many components are on the 18-36 V to isolated 5 V / 1 A planar flyback?

25 components, from 22 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 18-36 V to isolated 5 V / 1 A planar flyback design files?

From the jonahsaunders/planar-studio 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 18-36 V to isolated 5 V / 1 A planar flyback design in my own project?

Yes, under the terms of its MIT license, which jonahsaunders chose for the repository.

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