STM32F407VGT6
Compact Multi-Bus Controller PCB
Overview
A compact, battery-powered multi-bus controller designed on a low-cost 2-layer PCB with USB, Ethernet, and CAN bus connectivity.
Gavriel BermanSystem architecture
MCU
POWER
MODULE
- POWER → MCUPowerSystem main power supply
- USB_CONN → POWERPower5V input from USB for battery charging and system power
- USB_CONN → MCUUSBNative USB communication interface
- MCU → CAN_TRANSGPIOCAN peripheral transmit and receive signals
- MCU → ETH_PHYGPIORMII interface and management lines for Ethernet
Bill of materials
| Part number | Type | Component | Manufacturer | Package | Qty | Datasheet | Match |
|---|---|---|---|---|---|---|---|
| STM32F407VET6 | MCU | STM32F407VGT6 Central processing unit managing USB, Ethernet, CAN bus, and system tasks | ST(意法半导体) | LQFP100_14X14MM | 1 | Matched | |
| TPS63020 | POWER | BQ24072 & TPS63020 Manages LiPo battery charging, path management, and generates stable 3.3V system rail | Texas Instruments | Digi-ReelR Alternate Packaging | 1 | Matched | |
| TJA1051T/3 | MODULE | NXP TJA1051T/3 Provides physical layer interface for CAN bus communication | NXP | Digi-ReelR Alternate Packaging | 1 | Matched | |
1 alternatives consideredAI verified | |||||||
| LAN8720A-CP | MODULE | Microchip LAN8720A Provides 10/100 Ethernet physical layer interface via RMII | MICROCHIP | VQFN | 1 | Matched | |
3 alternatives consideredAI verified | |||||||
| USB-TYPE-C-019 | MODULE | USB Type-C Receptacle Provides USB 2.0 connectivity and power input | DEALON | USB-C | 1 | Matched | |
4 alternatives consideredAI verified | |||||||
Build guide
5-7 hoursAdvanced
1
Procurement & Preparation
- Procure all bill of materials components including STM32F407VET6, TPS63020, TJA1051T/3, LAN8720A-CP, and USB-TYPE-C-019 along with the custom 2-layer PCB.
- Prepare the stencil, lead-free solder paste, and clean the 2-layer PCB surface with isopropyl alcohol.
2
Hardware Assembly & Wiring
- Apply lead-free solder paste to the PCB pads using the alignment stencil and secure the board on a flat workstation.
- Place the USB Type-C receptacle (USB-TYPE-C-019), TPS63020 power management IC, TJA1051T/3 CAN transceiver, LAN8720A-CP Ethernet PHY, and STM32F407VET6 MCU onto their designated paste-coated pads.
- Reflow the populated 2-layer PCB assembly using a reflow oven or hot air station following the lead-free thermal profile.
- Inspect solder joints under a microscope for bridging, cold joints, or tombstoning, and perform manual touch-ups with a soldering iron if needed.
3
Firmware Setup
- Connect an ST-LINK programmer to the SWD debug header pads on the 2-layer PCB and link to a host PC running STM32CubeIDE.
- Configure firmware initialization code for system clock, USB 2.0 interface, RMII Ethernet pins (LAN8720A), and CAN bus TX/RX lines (TJA1051T/3).
- Compile and flash the binary image to the STM32F407VET6 flash memory.
4
Testing & Calibration
- Measure the 3.3V system output rail from the TPS63020 regulator using a digital multimeter to confirm proper power delivery.
- Connect a USB-C cable to test USB enumeration, plug in an Ethernet cable to verify link lights and packet transmission on the LAN8720A, and test CAN bus communication via the TJA1051T/3 interface.
Document
Compact Multi-Bus Controller PCB
A compact, battery-powered multi-bus controller designed on a low-cost 2-layer PCB with USB, Ethernet, and CAN bus connectivity.
Design Overview
| Item | Details |
|---|---|
| Product Type | Compact Battery-Powered Controller |
| Key Functions | Wired communication via USB, Ethernet, and CAN bus, Rechargeable battery power management, Compact wearable or handheld operation |
| Power Source | Rechargeable Battery |
| Connectivity | USB, Ethernet, CAN bus |
| Size | Compact / ultra-small wearable or handheld |
| Environment | wearable |
| Difficulty | Advanced |
| Est. Time | 5-7 hours |
System Architecture
Power Topology: Single-cell LiPo battery provides nominal 3.7V, managed by BQ24072 for charging and load sharing. A TPS63020 buck-boost converter steps the battery or USB VBUS voltage to a stable 3.3V rail powering the MCU, CAN transceiver, and Ethernet PHY.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| MCU | MCU | STM32F407VGT6 | Central processing unit managing USB, Ethernet, CAN bus, and system tasks | 3.3V |
| POWER | POWER | BQ24072 & TPS63020 | Manages LiPo battery charging, path management, and generates stable 3.3V system rail | 3.7V - 5V |
| CAN_TRANS | MODULE | NXP TJA1051T/3 | Provides physical layer interface for CAN bus communication | 3.3V |
| ETH_PHY | MODULE | Microchip LAN8720A | Provides 10/100 Ethernet physical layer interface via RMII | 3.3V |
| USB_CONN | MODULE | USB Type-C Receptacle | Provides USB 2.0 connectivity and power input | 5V |
Key Components
5/5 modules matched to real parts. See the BOM tab for the full component table.
STM32F407VGT6 (STM32F407VET6)
The candidate MPN STM32F407VET6 matches the primary MPN family STM32F407VGT6 (with a smaller flash size variant suffix,
BQ24072 & TPS63020 (TPS63020)
The candidate's MPN (TPS63020) matches the primary MPN and is from Texas Instruments, which fits the system requirements
Build Summary
- Difficulty: Advanced
- Estimated time: 5-7 hours
- Tools required: Solder stencil, Squeegee, Reflow oven or Hot air station, Digital microscope, Soldering iron, Solder wick
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Recreate as schematic and PCB