HardLabs

PowerDistributionBoard

AnmolS-EE·PowerDistributionBoard-PCB·Hardware/PowerDistributionBoard.kicad_pcb

PowerDistributionBoard PCB layout, top view — open source ESP32 board by AnmolS-EE

About the PowerDistributionBoard PCB

PowerDistributionBoard is an open source ESP32 PCB design by AnmolS-EE, published on GitHub under the MIT license. It is a 4-layer board measuring 90 × 90 mm, with 58 components from 42 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the XL4016, AMS1117-3.3, FUSB302BMPX, LM2596S-ADJ and INA226. By type, the board carries 20 resistors, 10 capacitors, 8 ICs, 6 connectors, 4 transistors and 4 diodes.

It belongs with the power & battery designs in this gallery.

From the project

A high-efficiency power distribution board (PDB) designed to convert a single DC input (24V/10A) into multiple regulated rails for laboratory and personal device charging.

Simulation Note (XL4016 vs. LT1074): The XL4016 used in the KiCad schematic doesn’t have a public SPICE model, so I used the Analog Devices LT1074 to simulate the circuit and verify the LC filter design and transient behavior.

Note: The feedback resistors in the simulation (1kΩ / 1.26kΩ) were chosen to match the LT1074’s 2.21V reference. On the actual PCB, I’m using (1kΩ / 3kΩ) based on the XL4016’s 1.25V reference.

PowerDistributionBoard, from the project README
From the project README

Main components on the PowerDistributionBoard

XL4016AMS1117-3.3ESP32-S3-WROOM-1FUSB302BMPXLM2596S-ADJINA226OLED

PowerDistributionBoard bill of materials (BOM)

58 components, 42 distinct parts.

QtyPartRefs
1
XL4016
U1
1
AMS1117-3.3
U2
1
ESP32-S3-WROOM-1
U3
1
FUSB302BMPX
U4
1
LM2596S-ADJ
U5
2
INA226
U6, U8
1
OLED
U7
1
2N7002(9V)
Q1
1
2N7002(12V)
Q2
1
AO3401A
Q3
1
2N7002
Q4
1
USB_C_Programming_Port
J1
1
Main Input
J2
1
Main Output
J3
1
USB_A
J4
1
USB_C_Receptacle_PowerOnly_6P
J6
1
USB_C_Receptacle_USB2.0_16P
J7
1
10A
F1
2
SW_Push
SW1, SW2
1
SW_SPDT
SW3
Show 22 more
QtyPartRefs
1
D_Schottky(MBR1545)
D1
1
D_Schottky
D2
2
LED
D3, D4
1
47uH (8A+)
L1
1
47uH
L2
2
470uF 50V
C1, C9
2
470uF 16V
C2, C10
1
0.1uF/100nF
C3
1
0.1uF / 100nF
C4
1
10uF
C5
1
22uF
C6
1
1uF
C7
1
0.1uF
C8
2
3k
R1, R8
3
1k
R2, R12, R18
7
10K
R3, R6, R13, R14, R17, R19, R20
2
4.7K
R4, R5
1
3.3k
R7
1
1.74k
R9
1
Shunt_Main
R10
1
Shunt_Vbus
R11
2
5.1K
R15, R16

PowerDistributionBoard design files

The KiCad project lives in the AnmolS-EE/PowerDistributionBoard-PCB repository on GitHub; these links point at the commit this page was built from.

PowerDistributionBoard: common questions

What microcontroller does the PowerDistributionBoard use?

The PowerDistributionBoard is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the PowerDistributionBoard PCB?

The PowerDistributionBoard measures 90 × 90 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the PowerDistributionBoard?

58 components, from 42 distinct parts. The full bill of materials is listed on this page.

Where can I download the PowerDistributionBoard design files?

From the AnmolS-EE/PowerDistributionBoard-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PowerDistributionBoard design in my own project?

Yes, under the terms of its MIT license, which AnmolS-EE chose for the repository.

Can I test firmware for the PowerDistributionBoard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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