Mobile EV Charger Control Board Design

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

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Power Section Design Notes — URIMKOREA UR-150K Control Board
Scope
Power-section schematic only. PCB layout has not been created.
Input and Protection Chain
  • Input connector: J1 24V DC industrial input terminal block
  • Input net sequence:
    1. 24V_IN_RAW
    2. F1 input fuse
    3. 24V_FUSED
    4. D1 TVS surge clamp to 0V_IN
    5. U1 + Q1 ideal-diode reverse polarity protection
    6. 24V_REVPROT
    7. L1 common-mode EMI choke
    8. 24V_EMI_OUT
    9. L2 + C3 LC filter
    10. 24V_IN_FILTERED
Isolation Boundary
  • Primary/input ground: 0V_IN / 0V_FILTERED
  • Secondary isolated ground: ISO_GND
  • Isolation is provided by the isolated DC/DC converters U2 and U3.
  • No intentional connection was made between input ground and ISO_GND in this schematic.
Output Rails

Table

RailSourceIntended LoadNominal Capability
ISO_12VU2 PDQ30-Q24-S12-DRelay and contactor drivers12V, up to 2.5A
ISO_5VU3 IRE-24/5-Q12PF-CIsolated communication interfaces5V, up to 5A
ISO_3V3_MCUU4 SGM2212-3.3XKC3G/TR from ISO_5VSTM32H743 and logic3.3V, up to 800mA
Note: a direct 24V-input isolated 3.3V / 1A module was not available in the library search results, so 3.3V is derived from the isolated 5V rail using a low-noise LDO. It remains isolated from the 24V input because the upstream 5V converter is isolated.
Power-Good Monitoring
  • PG_12V: U5 monitors scaled ISO_12V via divider R4/R5.
  • PG_5V: U6 monitors ISO_5V.
  • PG_3V3: U7 monitors ISO_3V3_MCU.
  • R1, R2, and R3 pull the power-good outputs up to ISO_3V3_MCU for MCU-compatible logic.
Open Engineering Assumptions
  • Final load currents for relay coils, contactors, fans, communications, and MCU peripherals are not yet defined; fuse and filter values should be rechecked once the full system BOM is known.
  • Power-good thresholds should be finalized against the selected voltage detector suffixes and exact undervoltage trip requirements.
  • DC/DC converter remote enable and trim pins are marked no-connect for now; confirm against final converter datasheets before release.

  • Scope

  • Input and Protection Chain

  • Isolation Boundary

  • Output Rails

  • Power-Good Monitoring

  • Open Engineering Assumptions

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