Mobile EV Charger Control Board Design

flux

Completed the dedicated Ethernet schematic section as ETH Sheet / ETH_COMM using LAN8742A, RJ45 MagJack, ESD protection, 25MHz crystal, Link/Activity LEDs, PHY reset RC, and strap resistors. No PCB layout was created, and ERC/passive/component checks show no current errors or warnings.
Notes: ETH Sheet Design Notes
Estimated time saved vs. manual EDA workflow: ~4–6 hours.
Open items:
  • Confirm final LAN8742A strap logic before PCB layout.
  • Keep Ethernet ESD devices near the RJ45 during layout.
Suggested next steps:
  1. Create the dedicated CAN Sheet.
  2. Create the dedicated RS485 Sheet.
  3. Define the remaining sheets: SECC, IMD, SAFETY, OUTPUT DRIVER, and ANALOG SENSING.

flux

I’ll open the attached text file and apply its instructions to the current schematic workflow if it contains design requirements.

flux

Created the dedicated CAN Sheet / CAN_COMM schematic section for CAN FD x2 using ISO1042-family isolated CAN FD transceivers, selectable 120Ω termination, common-mode chokes, TVS/ESD protection, external connectors, and separated logic/field-side isolated nets. ERC/passive/component checks show no current errors or warnings.
Notes: CAN Sheet Design Notes
Estimated time saved vs. manual EDA workflow: ~4–6 hours.
Open items:
  • Confirm dedicated isolated 5V field-side supply source for each CAN channel before layout.
  • Confirm CAN connector pinout/order before manufacturing documentation.
Suggested next steps:
  1. Create the dedicated RS485 Sheet.
  2. Create the SECC Sheet.
  3. Create the IMD Sheet.
  4. Create SAFETY, OUTPUT DRIVER, and ANALOG SENSING sheets.
Create next sheets
Create RS485 sheet
Create SECC sheet
Create IMD sheet
Review sheet structure
Explain CAN isolation
Sign up to send

Files

Schematic

Layout

Preview

ETH Sheet Design Notes — ETH_COMM
Scope
Dedicated Ethernet communication schematic section for URIMKOREA UR-150K. PCB layout was not created.
Sheet / Group
  • Schematic section/group name used: ETH Sheet
  • Functional sheet name requested: ETH_COMM
  • Existing MCU and POWER sections were not intentionally edited for this ETH-specific update; ETH signals are connected by named RMII nets.
Main Components
  • U20 — LAN8742A-CZ RMII Ethernet PHY
  • J20 — RJ45 connector with integrated magnetics
  • Y20 — 25MHz crystal
  • D20, D12 — Ethernet differential pair ESD protection
  • LED20 — Link LED
  • LED2 — Activity LED
  • R40 — PHY RBIAS resistor
  • R32, C49 — PHY reset RC network
  • R33, R34 — LED current-limit resistors
  • R35, R36, R37 — PHY strap resistors
  • C47, C48 — 25MHz crystal load capacitors
  • C50, C51, C52 — PHY VDDCR, local decoupling, and local bulk capacitance
Key Nets

Table

FunctionNet
RMII REF_CLKETH_RMII_REF_CLK
RMII MDIO/MDCETH_MDIO, ETH_MDC
RMII CRS_DVETH_CRS_DV
RMII RXD0/RXD1ETH_RXD0, ETH_RXD1
RMII TX_ENETH_TX_EN
RMII TXD0/TXD1ETH_TXD0, ETH_TXD1
PHY crystalETH_LAN8742_XTAL1, ETH_LAN8742_XTAL2
RJ45 pairsETH_LAN8742_TXP/TXN, ETH_LAN8742_RXP/RXN
PHY resetETH_PHY_NRST
LEDsETH_LINK_LED, ETH_ACTIVITY_LED
Verification
ERC/passive/component checks were run after the ETH Sheet update. No current errors or warnings remained for the requested review set.
Open Items
  • Confirm final LAN8742A strap resistor logic against the exact selected operating mode before layout release.
  • Keep Ethernet ESD parts physically near J20 during PCB layout.
  • Maintain RMII trace-length and impedance discipline during layout.

  • Scope

  • Sheet / Group

  • Main Components

  • Key Nets

  • Verification

  • Open Items