Ultrasonic Transducer Driver PCB Design

flux

I added the full component set for the revised architecture: the project now has 89 components, including RP2040 + flash + 12 MHz crystal, LM5164 / TPS54202H / TLV75733 power tree, MP1923 half-bridge driver, the two Infineon GaN FETs, current monitor, relay-switched inductor bank, TVS/PTC protection, thermistor, and all requested connectors. The important 2 MHz assumption is approved and the half-bridge path is represented in the schematic component set.
What remains:
  • Nothing is wired yet, so the project still has 0 nets.
  • I have not run ERC/review.
  • A few implementation choices were intentionally left for wiring/validation:
    • reverse-polarity protection is still unresolved as a P-channel MOSFET because a suitable 80–100 V library part was not found
    • the 2 MHz output stage is documented as an engineering assumption using MP1923 + GaN, not a vendor 2 MHz reference design
    • role-property labels on many generics were accepted but flagged as nonstandard wording
Recommended next steps when execution is available again:
  1. Wire power rails first: 60 V input protection, 28 V buck, 5 V buck, 3.3 V LDO, all decoupling
  2. Wire RP2040 support: flash, crystal, RUN, UART header, ADC nets
  3. Wire the MP1923 + GaN half-bridge and selected matching network
  4. Wire monitoring: INA138 current sense, envelope detect, thermistors, relay drivers
  5. Run review/ERC and fix violations
  6. Create a firmware starter file with the actual GPIO map for complementary 2 MHz burst generation and dead time
Current state is a populated but unwired schematic skeleton.
Wire power rails
Use ideal diode
Wire half-bridge
Run review
Document assumption

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Project Specification
Design Summary
Status: Draft / Review / Approved
Manufacturing target: Prototype / EVT / DVT / PVT / Production
Software / firmware: repository link
Scope
Purpose
In scope
Out of scope
System context
Requirements
Functional
Electrical
Mechanical / environmental
Key constraints
Dependencies and risks
Dependencies
Key risks
Validation
Success criteria
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Release-facing notes
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Special release notes
Change notes / open questions
Changes in this revision
Open questions

  • Design Summary

  • Scope

  • System context

  • Requirements

  • Functional

  • Electrical

  • Mechanical / environmental

  • Key constraints

  • Dependencies and risks

  • Validation

  • Release-facing notes

  • Change notes / open questions

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