12 V to 5 V / 1 A Buck Molecule (TPS54202)

@@ -2,14 +2,16 @@  Every step of the adom-aiflow run records its own clip of the KiCad window on the test box. This page is appended as each clip lands, so it can stay open in a browser tab while the build runs. -Last updated 2026-09-29 12:16 UTC. 4 clip(s).+Last updated 2026-09-29 12:56 UTC. 6 clip(s).  | # | step | recorded | clip | state | |---|---|---|---|---| | 1 | Placement (and the first traces) | 2026-09-29 02:34 UTC | [10x cut](#clip-1) | ok | | 2 | Routing landed, first pours | 2026-09-29 02:57 UTC | [10x cut](#clip-2) | see note |-| 3 | Routing rework (back from the current analysis) | 2026-09-29 11:56 UTC | [10x cut](#clip-3) | ok |-| 4 | Pours rework (back from the Fields solve) | 2026-09-29 12:11 UTC | [10x cut](#clip-4) | ok |+| 3 | Fields walkthrough (Adom Fields app) | 2026-09-29 12:52 UTC | [10x cut](#clip-3) | ok |+| 4 | Routing rework (back from the current analysis) | 2026-09-29 11:56 UTC | [10x cut](#clip-4) | ok |+| 5 | Pours rework (back from the Fields solve) | 2026-09-29 12:11 UTC | [10x cut](#clip-5) | ok |+| 6 | Thermal analysis, SW throat widened | 2026-09-29 12:43 UTC | [10x cut](#clip-6) | ok |  ### Clip 1: Placement (and the first traces) @@ -39,27 +41,55 @@ Contact sheet (nine frames): ![clip 2 contact sheet](docs/clips/window-461694-20  Raw recording: `window-461694-20260929-025743.mp4`, 1110 MB, kept with the run (not uploaded). -### Clip 3: Routing rework (back from the current analysis)+### Clip 3: Fields walkthrough (Adom Fields app)  <a id="clip-3"></a> +Recorded 2026-09-29 12:52 UTC. The Fields app walks the solved board: heat flow in each copper layer in 3D with the vias, the bottom ground plane, temperature in still air (+44 C at U1) and moving air (+24 C), and current density. 0 issues against the 55 C budget.++<video src="docs/clips/window-4852048-20260929-125229-10x.mp4" controls muted playsinline></video>++Motion-only action cut: [docs/clips/window-4852048-20260929-125229-action.mp4](clips/window-4852048-20260929-125229-action.mp4)++Contact sheet (nine frames): ![clip 3 contact sheet](docs/clips/window-4852048-20260929-125229-sheet.png)++Raw recording: `window-4852048-20260929-125229.mp4`, 181 MB, kept with the run (not uploaded).++### Clip 4: Routing rework (back from the current analysis)++<a id="clip-4"></a>+ Recorded 2026-09-29 11:56 UTC. FB and VOUT come off the bottom layer under the input hot loop; the feedback column (R1, R2, C9) is turned 180 degrees so it reads VOUT, R1, FBM, R2, FB; the LED moves beside the output; the VOUT sense re-routes along the top edge.  <video src="docs/clips/window-593052-20260929-115650-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): ![clip 3 contact sheet](docs/clips/window-593052-20260929-115650-sheet.png)+Contact sheet (nine frames): ![clip 4 contact sheet](docs/clips/window-593052-20260929-115650-sheet.png)  Raw recording: `window-593052-20260929-115650.mp4`, 463 MB, kept with the run (not uploaded). -### Clip 4: Pours rework (back from the Fields solve)+### Clip 5: Pours rework (back from the Fields solve) -<a id="clip-4"></a>+<a id="clip-5"></a>  Recorded 2026-09-29 12:11 UTC. SW patch from U1 to the inductor, solid ground at U1's GND pin with thermal vias, the stray SW vias and corridor GND vias removed, every zone refilled.  <video src="docs/clips/window-593052-20260929-121139-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): ![clip 4 contact sheet](docs/clips/window-593052-20260929-121139-sheet.png)+Contact sheet (nine frames): ![clip 5 contact sheet](docs/clips/window-593052-20260929-121139-sheet.png)  Raw recording: `window-593052-20260929-121139.mp4`, 87 MB, kept with the run (not uploaded). +### Clip 6: Thermal analysis, SW throat widened++<a id="clip-6"></a>++Recorded 2026-09-29 12:43 UTC. The board while the current and thermal gates ran; the SW patch opened right after U1's SW pin and the pours were re-landed (peak current density 215 to 50 A/mm2 over the rework).++<video src="docs/clips/window-593052-20260929-124348-10x.mp4" controls muted playsinline></video>++Motion-only action cut: [docs/clips/window-593052-20260929-124348-action.mp4](clips/window-593052-20260929-124348-action.mp4)++Contact sheet (nine frames): ![clip 6 contact sheet](docs/clips/window-593052-20260929-124348-sheet.png)++Raw recording: `window-593052-20260929-124348.mp4`, 344 MB, kept with the run (not uploaded).+