4 layers58.4 × 38.7 mm LED USB Hub, the printed circuit board in 3D

LED USB Hub

A 3 Port USB Hub, USB-C Upstream, USB A with RGB LED downstream, features an RP2040 to run the LEDs and possibly other features

Full screen GitHub .kicad_pcb

Size: 58.4 × 38.7 mm
Copper layers: 4
Thickness: 1.63 mm
Parts: 125
Nets: 103
Pads: 407
Tracks, vias: 1,115, 87
Pours: 582
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 26 Dec 2023
Updated: 26 Jun 2025

Overview

LED USB Hub is an open-source printed circuit board by mjhaahr, from the mjhaahr/LED-USB-Hub repository on GitHub. It is a 4-layer board of 58.4 × 38.7 mm with 125 parts on 103 nets, routed with 1,115 tracks and 87 vias.

It is built around the TLV62569PDDCR, TUSB2046IBVF and TPS2042D, with the MAX809S, TPD2EUSB30DRT and KC2520Z8.00000C1KX00 among its other parts. Its parts include 45 resistors, 41 capacitors, 7 ICs, 7 diodes and 5 connectors. It belongs with the lEDs and displays and interfaces and adapters boards and the RP2040 and STM32 boards of this library.

Main components

README

README.md

3-Port USB Hub with Integrated Microcontroller and RGB USB-A Ports

Assembled PCB

Full Board Design Render

Features

USB C Port for Upstream
3 USB 2.0 Downstream Ports
- USB A, Full Speed
- Using RGB LED USB Ports (the reason behind this whole project)
STM32L552 to Control the LEDs
- Intended to be flashed using DFU, but SWD with Reset is available
USB Hub Controller:
- Using a TI 4 Port USB Controller
Status LEDs for Power and USB Connection

PCBWay

Version 3 of the RGB LED USB Hub was kindly supported by PCBWay, who graciously provided the PCBs for this project.

Unassembled Boards

PCBWay offers very affordable and high-quality PCB manufacturing and assembly, as well as CNC machining and 3D printing, for hobbyists, low-volume prototyping, and even commercial use. They provide fast turnaround times, an easy-to-use service, and highly accurate and detailed boards all at a low cost. Their Standard PCBs satisfy most needs for reliable circuit boards: offering precise boards, layer counts up to 14, a wide variety of soldermask and silkscreen colors - even full color printing, and different materials like aluminum. But they also offer Advanced PCBs for even greater capabilities and performance or Flexible/Rigid-Flex PCBs when the designs need to bend.

PCBWay Logo

Features
PCBWay
Bill Of Materials
Part Selection
Case Design
Code
Extra Notes

Schematic

Bill of Materials

ICs
- STMicroelectronics STM32L552CET6 - Microcontroller w/ USB and Multiple PWM Timers
  - Component: U1
  - Quantity: 1
  - Datasheet
  - DigiKey
- TI TUSB2046 - 4 Port USB 2.0 Hub/Controller
  - Component: U2
  - Quantity: 1
  - Datasheet
  - DigiKey
- TI TLV62569 - High Efficiency Buck Converter (3V3 Regulator)
  - Component: U3, U4
  - Quantity: 2
  - Datasheet
  - DigiKey
- TI TPS2042BDR - USB Power Switch (500 mA)
  - Component: U5, U6
  - Quantity: 2
  - Datasheet
  - DigiKey
- Analog Devices/Maxim Integrated MAX809 - 3V Power Supervisor
  - Component: U7
  - Quantity: 1
  - Datasheet
  - DigiKey
Diodes
- Broadcom HSMF-C143 - Dual Color (Amber: Power/Green: USB) Status LED
  - Component: D1
  - Quantity: 1
  - Datasheet
  - DigiKey
- TI ESD441- 1-Channel VUSB ESD Diode
  - Component: D2
  - Quantity: 1
  - Datasheet
  - DigiKey
- TI TPD2EUSB30 - 2-Channel USB ESD/TVS Diode
  - Component: D3, D4, D5, D6, D7
  - Quantity: 5
  - Datasheet
  - DigiKey
Connectors
- GCT USB4085-GF-A - USB 2.0 Type C Port
  - Component: J1
  - Quantity: 1
  - Datasheet
  - DigiKey
- Tensility 54-00266 - RGB USB 2.0 Type A Port
  - Component: J2, J3, J4
  - Quantity: 3
  - Datasheet
  - DigiKey
Switches
- Panasonic EVQ-P7L01P - Tactile Push Button
  - Component: SW1, SW2, SW3
  - Quantity: 3
  - Datasheet
  - DigiKey
Oscillators
- ECS ECS-2033-080-BN - STM32 8 MHz HSE
  - Component: Y1
  - Quantity: 1
  - Datasheet
  - DigiKey
- ECS ECS-2033-060-BN - USB Controller 6 MHz
  - Component: Y2
  - Quantity: 1
  - Datasheet
  - DigiKey
Capacitors
- All Components are 0603 MLCC Capacitors unless otherwise noted
- 100nF
  - Component: C1, C2, C3, C4, C5, C9, C11, C12, C34, C35, C37, C39, C41
  - Quantity: 13
  - DigiKey
- 10µF
  - Component: C6, C25, C27, C28, C29, C31, C32, C33
  - Quantity: 8
  - DigiKey
- 1µF
  - Component: C7, C10, C24
  - Quantity: 3
  - DigiKey
- 10nF
  - Component: C8, C13
  - Quantity: 2
  - DigiKey
- 22pF
  - Component: C14, C15, C16, C17, C18, C19, C20, C21, C22, C23
  - Quantity: 10
  - DigiKey
- 4.7µF
  - Component: C26, C30
  - Quantity: 2
  - DigiKey
- 100µF - Tantalum
  - Component: C36, C38, C40
  - Quantity: 3
  - DigiKey
Resistors:
- All Components are 0603 Thick Film Resistors unless otherwise noted
- 200Ω
  - Component: R1, R4, R7
  - Quantity: 3
  - DigiKey
- 62Ω
  - Component: R2, R5, R8
  - Quantity: 3
  - DigiKey
- 27Ω
  - Component: R3, R6, R9, R15, R16, R18, R19, R22, R23, R26, R27, R30, R31
  - Quantity: 13
  - DigiKey
- 10kΩ
  - Component: R10, R11, R12, R46, R47, R48, R40, R45
  - Quantity: 9
  - DigiKey
- 1.74kΩ
  - Component: R13
  - Quantity: 1
  - DigiKey
- 665Ω
  - Component: R14
  - Quantity: 1
  - DigiKey
- 1.5kΩ
  - Component: R17
  - Quantity: 1
  - DigiKey
- 15kΩ
  - Component: R20, R21, R24, R25, R28, R29, R32, R33
  - Quantity: 8
  - DigiKey
- 5.1kΩ
  - Component: R34, R35
  - Quantity: 2
  - DigiKey
- 453kΩ
  - Component: R41, R43
  - Quantity: 2
  - DigiKey
- 100kΩ
  - Component: R42, R44
  - Quantity: 2
  - DigiKey
Inductor
- Bourns SRP4020FA-2R2M - 2.2µH Inductor
  - Component: L1, L2
  - Quantity: 2
  - Datasheet
  - DigiKey

Part Selection

Power Supply selected using TI Webench Power Designer:
- DC-DC: 5V In, 3.3V @ 1A (min) Out
- High-Efficiency
- Webench Page
LED Resistors:
- Indicators:
  - Target Intensity of 2.5mcd
  - Amber:
    - Average 66mcd @ 20mA
    - Forward Voltage of 2V
    - Target Current: ~0.75mA
    - Resistance: 1.74kΩ
  - Green:
    - Average 25.5mcd @ 20mA
    - Forward Voltage of 2V
    - Target Current: ~1.96mA
    - Resistance: 665Ω
- USB:
  - Target Intensity of 200mcd
  - Red:
    - Average 600mcd @ 20mA
    - Forward Voltage of 1.3V
    - Target Current: ~6.5mA
    - Resistance: 200Ω
  - Green:
    - Average 800mcd @ 20mA
    - Forward Voltage of 0.3V
    - Target Current: ~5mA
    - Resistance: 62Ω
  - Blue:
    - Average 350mcd @ 20mA
    - Forward Voltage of 0.3V
    - Target Current: ~11.5mA
    - Resistance: 27Ω

Case Design

3D Printed Top and Bottom Covers

Code

To view all the code, see it here

Extra Notes

Version 1:
- V1 used an Adafruit KB2040 Dev Board instead of a standalone implementation
- V1 used the SL2.1a USB Hub and was a poor attempt to get USB working
Version 2:
- Proper standalone RP2040 implementation
- Switch to TUSB2046 4-Port USB Controller
- Switch to 4 Layer Board with correct implementation of USB Hardware Guidelines
Version 3:
- Switch to STM32 (STM32L552)
- Shrink board
- Switch to Oscillators from Crystals
- 3V3 Regulators using a larger package
- Fully Enclosed 3D Printed Case

Category and platform

LEDs and displays Interfaces and adapters RP2040 STM32

Topics

rgb-led rp2040 usb

Project files

Show this board on your page

https://pcbkit.io/boards/mjhaahr/LED-USB-Hub

The board's own page, for a message or a post.

Source

Repository: mjhaahr/LED-USB-Hub
Board file: led-usb-hub/led-usb-hub.kicad_pcb
Commit: 197e30b
Licence: Not stated

Parts

125

Qty	Value	Footprint	References
13	100nF	Capacitor_SMD:C_0603_1608Metric	C1, C2, C3, C4, C5, C9, C11, C12, C34, C35, C37, C39, C41
13	27	Resistor_SMD:R_0603_1608Metric	R3, R6, R9, R15, R16, R18, R19, R22, R23, R26, R27, R30, R31
10	22pF	Capacitor_SMD:C_0603_1608Metric	C14, C15, C16, C17, C18, C19, C20, C21, C22, C23
9	10k	Resistor_SMD:R_0603_1608Metric	R10, R11, R12, R36, R37, R38, R39, R40, R45
8	10uF	Capacitor_SMD:C_0603_1608Metric	C6, C25, C27, C28, C29, C31, C32, C33
8	15k	Resistor_SMD:R_0603_1608Metric	R20, R21, R24, R25, R28, R29, R32, R33
5	TPD2EUSB30	TPD2EUSB30DRTR:DRT0003A	D3, D4, D5, D6, D7
4	LOGO	LOGO	G***, G1, G2, G3
3	100uF-T	Capacitor_Tantalum_SMD:CP_EIA-3528-15_AVX-H	C36, C38, C40
3	1uF	Capacitor_SMD:C_0603_1608Metric	C7, C10, C24
3	200	Resistor_SMD:R_0603_1608Metric	R1, R4, R7
3	62	Resistor_SMD:R_0603_1608Metric	R2, R5, R8
3	RGBUSB_54-00266	54-00266 RGB-USB Port:RGBUSB_54-00266	J2, J3, J4
2	100k	Resistor_SMD:R_0603_1608Metric	R42, R44
2	10nF	Capacitor_SMD:C_0603_1608Metric	C8, C13
2	2.2uH	SRP4020FA_2R2M:IND_SRP4020FA-2R2M_BRN	L1, L2
2	4.7uF	Capacitor_SMD:C_0603_1608Metric	C26, C30
2	453k	Resistor_SMD:R_0603_1608Metric	R41, R43
2	5.1k	Resistor_SMD:R_0603_1608Metric	R34, R35
2	MountingHole	MountingHole:MountingHole_2mm	H1, H2
2	TLV62569PDDCR	TLV62569PDDCR:SOT95P280X110-6N	U3, U4
2	TPS2042D	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U5, U6
1	1.5k	Resistor_SMD:R_0603_1608Metric	R17
1	1.74k	Resistor_SMD:R_0603_1608Metric	R13
1	3V3L	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP3
1	3V3MCU	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP2
1	665	Resistor_SMD:R_0603_1608Metric	R14
1	BOOT	EVQ_P7L01P:SW_EVQ-P7L01P	SW2
1	ESD441	EasyEDA2KiCad:X2SON-2_L0.6-W0.3-P0.35_ESD441DPLR	D2
1	GND	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP6
1	KC2520Z6.00000C1GX00	KC2520Z6.00000C1GX00:OSC_KC2520Z6.00000C1GX00	Y2
1	KC2520Z8.00000C1KX00	KC2520Z8_00000C1KX00:OSC_KC2520Z8.00000C1KX00	Y1
1	LED EN	EVQ_P7L01P:SW_EVQ-P7L01P	SW3
1	MAX809	Package_TO_SOT_SMD:SOT-23	U7
1	RESET	EVQ_P7L01P:SW_EVQ-P7L01P	SW1
1	RX	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP5
1	STM32L552CETx	Package_QFP:LQFP-48_7x7mm_P0.5mm	U1
1	SWD	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	J5
1	SolderJumper_3_Bridged12	Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm	JP1
1	TUSB2046IBVF	Package_QFP:LQFP-32_7x7mm_P0.8mm	U2
1	TX	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP4
1	USBC_USB2.0	Connector_USB:USB_C_Receptacle_GCT_USB4085	J1
1	VUSB	TestPoint:TestPoint_Pad_1.0x1.0mm_Mod	TP1
1	~	HSMF-C143:HSMF-C143	D1

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Questions

How big is the LED USB Hub PCB?

It measures 58.4 × 38.7 mm and has 4 copper layers, 1.63 mm thick.

What parts does the LED USB Hub use?

125 parts, built around the TLV62569PDDCR, TUSB2046IBVF, TPS2042D and MAX809S. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the LED USB Hub KiCad files?

From the mjhaahr/LED-USB-Hub repository on GitHub, at the commit this page was made from: the board is led-usb-hub/led-usb-hub.kicad_pcb and its schematic led-usb-hub/led-usb-hub.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the LED USB Hub design in my own project?

Its repository states no licence, so its author keeps all rights: ask mjhaahr before reusing the design.