molecule
12 V to 5 V / 1 A Buck Molecule (TPS54202), built in Altium Designer
Public Unreviewedby Colby Knox
A 12 V to 5 V, 1 A TPS54202 buck molecule designed and built by AI in Altium Designer from one sentence, with the Altium project, Gerbers, BOM, simulation and current and heat analysis.
main
Colby Knox
Altium Designer build of the TPS54202 buck molecule: Altium project, manufacturing set, STEP and GLB, design, simulatio…
845dd0d
4d ago
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{
"barrelCoupling": {
"drillVoidsRemoved": true,
"model": "distributed-plated-wall",
"platingUm": 25,
"quadrature": "uniform-perimeter-32-samples-per-cell-minimum-128",
"unresolvedWall": "nearest cells with copper on both faces (fallback: true on the connection)"
},
"board": {
"cellMm": 0.2,
"cols": 140,
"copperLayers": [
"F.Cu",
"B.Cu"
],
"copperUm": 35.0,
"copperUmByLayer": {
"B.Cu": 35.0,
"F.Cu": 35.0,
"In1.Cu": 35.0,
"In2.Cu": 35.0,
"In3.Cu": 35.0,
"In4.Cu": 35.0
},
"description": "12 V to 5 V / 1 A buck (TI TPS54202 synchronous buck, 500 kHz), Altium Designer, 28 x 20 mm Adom molecule, 2 layers, medium machine pins on a 24 x 16 mm grid",
"dielectricMm": [
1.53
],
"heightMm": 20.0,
"layers": [
"F.Cu",
"In1.Cu",
"In2.Cu",
"In3.Cu",
"In4.Cu",
"B.Cu"
],
"name": "12 V to 5 V / 1 A buck",
"rows": 100,
"slotDielectricMm": [
0.306,
0.306,
0.306,
0.306,
0.306
],
"stackupFrom": "board file (its stackup, else its thickness)",
"thicknessMm": 1.6,
"widthMm": 28.0,
"x0": 0.0,
"y0": -20.0
},
"chips": [
{
"airW": 0.011,
"dielW": 0.014,
"otherViaW": 0.071,
"otherVias": 1,
"planeW": 0.148,
"reference": "U1",
"riseC": 43.4,
"riseMovingC": 23.2,
"tabNet": "GND",
"viaW": 0.007,
"vias": 3,
"viasWanted": 0,
"watts": 0.25,
"x": 15.1375,
"y": -10.05
},
{
"airW": 0.01,
"dielW": 0.011,
"otherViaW": 0.013,
"otherVias": 0,
"planeW": 0.086,
"reference": "L1",
"riseC": 37.6,
"riseMovingC": 17.4,
"tabNet": "VOUT",
"viaW": 0.0,
"vias": 1,
"viasWanted": 0,
"watts": 0.12,
"x": 23.175,
"y": -11.0
}
],
"fixPlan": [
{
"action": {
"count": 1,
"from": [
20.4,
0.0
],
"insetMm": 0.6,
"net": "GND",
"pitchMm": 9.2,
"points": [
[
16.0,
-0.6
]
],
"to": [
12.0,
0.0
],
"type": "add-vias"
},
"at": [
16.0,
0.0
],
"do": "Add 1 ground via(s) along the edge (the action lists each point) from (20.4, 0.0) to (12.0, 0.0), one every 9.2 mm, about 0.6 mm in from the edge.",
"kind": "stitching-gap",
"severity": "low",
"step": 1
},
{
"action": {
"count": 1,
"from": [
7.6,
-20.0
],
"insetMm": 0.6,
"net": "GND",
"pitchMm": 9.2,
"points": [
[
11.2,
-19.4
]
],
"to": [
14.8,
-20.0
],
"type": "add-vias"
},
"at": [
11.2,
-20.0
],
"do": "Add 1 ground via(s) along the edge (the action lists each point) from (7.6, -20.0) to (14.8, -20.0), one every 9.2 mm, about 0.6 mm in from the edge.",
"kind": "stitching-gap",
"severity": "low",
"step": 2
},
{
"action": {
"between": [
"VIN",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J1.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
2.0,
-14.0
],
"do": "If J1 faces the outside world, add a TVS (low capacitance, for a signal) from VIN to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"severity": "low",
"step": 3
},
{
"action": {
"between": [
"EN",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J3.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
2.0,
-6.0
],
"do": "If J3 faces the outside world, add a TVS (low capacitance, for a signal) from EN to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"severity": "low",
"step": 4
},
{
"action": {
"between": [
"VOUT",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J4.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
26.0,
-14.0
],
"do": "If J4 faces the outside world, add a TVS (low capacitance, for a signal) from VOUT to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"severity": "low",
"step": 5
},
{
"action": {
"between": [
"VMON",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J6.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
26.0,
-6.0
],
"do": "If J6 faces the outside world, add a TVS (low capacitance, for a signal) from VMON to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"severity": "low",
"step": 6
},
{
"action": {
"byMm": 0.7,
"gap": {
"blockingNet": "BOOT",
"blockingPad": "C5.1",
"from": [
13.9,
-8.7
],
"gapMm": 0.4,
"joinedThroughVias": true,
"pieceAreaMm2": 4.08,
"to": [
13.9,
-9.1
]
},
"layer": "F.Cu",
"net": "GND",
"orRotateDeg": 90,
"pad": "1",
"reference": "C5",
"type": "move",
"why": "join a split pour"
},
"at": [
13.9,
-8.9
],
"do": "Rotate C5 90° or move it about 0.7 mm so its 1 pad (BOOT) leaves the gap and GND's pour on F.Cu closes; re-pour and re-run.",
"kind": "pour-fragmented",
"severity": "low",
"step": 7
},
{
"action": {
"at": [
2.6,
-15.5
],
"gap": {
"blockingNet": "GND",
"blockingPad": null,
"from": [
2.9,
-15.9
],
"gapMm": 1.0,
"joinedThroughVias": true,
"pieceAreaMm2": 12.84,
"to": [
2.3,
-15.1
]
},
"layer": "F.Cu",
"net": "GND",
"type": "reroute",
"why": "join a split pour"
},
"at": [
2.6,
-15.5
],
"do": "Reroute GND out of the 1.0 mm gap at (2.6, -15.5) on F.Cu so VIN's pour closes; re-pour and re-run.",
"kind": "pour-fragmented",
"severity": "low",
"step": 8
},
{
"action": {
"connectors": [
"J7",
"J5",
"J2"
],
"type": "review",
"what": "ground cabling"
},
"at": [
5.0,
-7.0
],
"do": "Return each cable's ground on its own connector and route paired wires together (twisted or adjacent), or tie the grounds at one point.",
"kind": "ground-loop-risk",
"severity": "low",
"step": 9
}
],
"flow": {
"cellMm": 0.2,
"cols": 140,
"file": "flow.bin",
"jMax": 41.724795976395775,
"layers": [
"F.Cu",
"In1.Cu",
"In2.Cu",
"In3.Cu",
"In4.Cu",
"B.Cu"
],
"layout": "for each layer in order: jx, jy (A/mm², physical sense, +x right, +y down the board as KiCad), volt (V; NaN off copper or where the rail is unknown), net (index into nets, -1 off copper); each float32 little-endian, rows*cols, row-major from (x0, y0)",
"method": "The DC solve per loaded net, signed: current enters at the source terminals and leaves at the sinks (a ground returns to its connector; the spec's `sources` names the part a net is fed from). Voltage = the net's rail at its anchor plus the solved IR drop; the rail comes from the spec's `voltages` or the net's name. A switching node is drawn as a tide between its rails at a slowed, stated rate.",
"nets": [
{
"loaded": false,
"name": "BOOT",
"railV": null,
"switching": null
},
{
"loaded": false,
"name": "EN",
"railV": null,
"switching": null
},
{
"loaded": false,
"name": "FB",
"railV": null,
"switching": null
},
{
"loaded": false,
"name": "FBM",
"railV": null,
"switching": null
},
{
"amps": 1.0,
"dropV": 0.001968493949830931,
"ground": true,
"loaded": true,
"name": "GND",
"note": null,
"railV": 0.0,
"sense": "from U1 to J2, J5, J7",
"switching": null,
"terminals": [
{
"amps": 0.3333333333333333,
"pad": "1",
"ref": "J7",
"role": "sink",
"x": 8.0,
"y": -4.0
},
{
"amps": 0.3333333333333333,
"pad": "1",
"ref": "J5",
"role": "sink",
"x": 26.0,
"y": -10.0
},
{
"amps": 0.3333333333333333,
"pad": "1",
"ref": "J2",
"role": "sink",
"x": 2.0,
"y": -10.0
},
{
"amps": 1.0,
"pad": "1",
"ref": "U1",
"role": "source",
"x": 15.1375,
"y": -10.05
}
],
"vias": [
{
"amps": -0.0007620228620170931,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.9000000000000001,
"y": -18.7
},
{
"amps": -0.0008243033627465544,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.1,
"y": -18.7
},
{
"amps": 0.0012029904288980776,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.900000000000002,
"y": -18.7
},
{
"amps": 0.0011306007560924986,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.1,
"y": -18.7
},
{
"amps": -0.00028930251993460743,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -18.5
},
{
"amps": -0.0007836648376480648,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.7000000000000002,
"y": -18.5
},
{
"amps": -0.0014012699968428126,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.3000000000000003,
"y": -18.5
},
{
"amps": -0.0006709529155104224,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -18.5
},
{
"amps": 0.0006265561630450317,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -18.5
},
{
"amps": 0.001614204775657306,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.700000000000003,
"y": -18.5
},
{
"amps": 0.0014319162228782932,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.3,
"y": -18.5
},
{
"amps": 0.0006044005096699953,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -18.5
},
{
"amps": -0.0006221982702330122,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -18.3
},
{
"amps": -0.0017699142497697496,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -18.3
},
{
"amps": 0.0011724247268045972,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -18.3
},
{
"amps": 0.0014473397960444057,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -18.3
},
{
"amps": -0.00040569688443020473,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.3,
"y": -18.1
},
{
"amps": -0.0016209826967827753,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.7,
"y": -18.1
},
{
"amps": 0.00025774312156229506,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.3,
"y": -18.1
},
{
"amps": 0.0011387371360911845,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.700000000000003,
"y": -18.1
},
{
"amps": -0.000424583650297384,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.3,
"y": -17.9
},
{
"amps": -0.0017250828720655892,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.7,
"y": -17.9
},
{
"amps": 0.00010596475413920551,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.3,
"y": -17.9
},
{
"amps": 0.0011203758096823334,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.700000000000003,
"y": -17.9
},
{
"amps": -0.0009388933103772583,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -17.7
},
{
"amps": -0.0024459054979940617,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -17.7
},
{
"amps": 0.000700644949756791,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -17.7
},
{
"amps": 0.0017546002176230902,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -17.7
},
{
"amps": -0.0005053255680041512,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -17.5
},
{
"amps": -0.0016636410646247773,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.7000000000000002,
"y": -17.5
},
{
"amps": -0.002794710928145894,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.3000000000000003,
"y": -17.5
},
{
"amps": -0.0010937496317008396,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -17.5
},
{
"amps": 0.0004384780923291915,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -17.5
},
{
"amps": 0.001415944348013828,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.700000000000003,
"y": -17.5
},
{
"amps": 0.0020082780234768837,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.3,
"y": -17.5
},
{
"amps": 0.0008085655783723573,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -17.5
},
{
"amps": -0.0016647221975342162,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.9000000000000001,
"y": -17.3
},
{
"amps": -0.0018186715623337761,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.1,
"y": -17.3
},
{
"amps": 0.001622100056318549,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.900000000000002,
"y": -17.3
},
{
"amps": 0.0016535870569950573,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.1,
"y": -17.3
},
{
"amps": -0.0019079224730398163,
"from": "F.Cu",
"to": "B.Cu",
"x": 15.9,
"y": -14.7
},
{
"amps": -0.003323159365531351,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.1,
"y": -14.7
},
{
"amps": -0.0025965661535429837,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.3,
"y": -14.7
},
{
"amps": -0.0037002892614951453,
"from": "F.Cu",
"to": "B.Cu",
"x": 15.9,
"y": -14.5
},
{
"amps": -0.004683770436336049,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.3,
"y": -14.5
},
{
"amps": -0.0030660440478117216,
"from": "F.Cu",
"to": "B.Cu",
"x": 15.9,
"y": -14.3
},
{
"amps": -0.005532564514809745,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.1,
"y": -14.3
},
{
"amps": -0.0034312194428475088,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.3,
"y": -14.3
},
{
"amps": -0.0005045570605101309,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.3,
"y": -13.7
},
{
"amps": -0.007665371263964134,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.5,
"y": -13.7
},
{
"amps": -0.006198389701855947,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.7,
"y": -13.7
},
{
"amps": -0.004934342734455226,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.3,
"y": -13.5
},
{
"amps": -0.01123267379497509,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.7,
"y": -13.5
},
{
"amps": -0.0061722400945588615,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.5,
"y": -13.3
},
{
"amps": -0.0006987542357490898,
"from": "F.Cu",
"to": "B.Cu",
"x": 17.7,
"y": -13.3
},
{
"amps": -0.022868605864698598,
"from": "F.Cu",
"to": "B.Cu",
"x": 10.100000000000001,
"y": -10.9
},
{
"amps": -0.04006080399141648,
"from": "F.Cu",
"to": "B.Cu",
"x": 9.9,
"y": -10.7
},
{
"amps": -0.03329051774635586,
"from": "F.Cu",
"to": "B.Cu",
"x": 10.3,
"y": -10.7
},
{
"amps": -0.002915494228535135,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.9000000000000001,
"y": -10.5
},
{
"amps": -0.0026135432264782024,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.1,
"y": -10.5
},
{
"amps": -0.043585716420510866,
"from": "F.Cu",
"to": "B.Cu",
"x": 9.9,
"y": -10.5
},
{
"amps": -0.037614027129826734,
"from": "F.Cu",
"to": "B.Cu",
"x": 10.3,
"y": -10.5
},
{
"amps": -0.005227017816405776,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.900000000000002,
"y": -10.5
},
{
"amps": -0.005457757688450038,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.1,
"y": -10.5
},
{
"amps": -0.009175980364100856,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.7000000000000002,
"y": -10.299999999999999
},
{
"amps": -0.006663370052441291,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.3000000000000003,
"y": -10.299999999999999
},
{
"amps": -0.03247120080771772,
"from": "F.Cu",
"to": "B.Cu",
"x": 10.100000000000001,
"y": -10.299999999999999
},
{
"amps": -0.00990093777276566,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.700000000000003,
"y": -10.299999999999999
},
{
"amps": -0.016067777307906688,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.3,
"y": -10.299999999999999
},
{
"amps": -0.0021098643008759617,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -10.1
},
{
"amps": -0.0017659418960907806,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -10.1
},
{
"amps": -0.0009223193614917915,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -10.1
},
{
"amps": -0.0035314476288354378,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -10.1
},
{
"amps": -0.0019558653840814995,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.5,
"y": -9.899999999999999
},
{
"amps": -0.0016883583100710513,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.5,
"y": -9.899999999999999
},
{
"amps": 0.06412069204238059,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.3,
"y": -9.899999999999999
},
{
"amps": -0.0003669511915257906,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.5,
"y": -9.899999999999999
},
{
"amps": -0.0032159485828622144,
"from": "F.Cu",
"to": "B.Cu",
"x": 26.5,
"y": -9.899999999999999
},
{
"amps": -0.004459471083976357,
"from": "F.Cu",
"to": "B.Cu",
"x": 1.7000000000000002,
"y": -9.7
},
{
"amps": -0.0035824875716318626,
"from": "F.Cu",
"to": "B.Cu",
"x": 2.3000000000000003,
"y": -9.7
},
{
"amps": 0.10192664276131014,
"from": "F.Cu",
"to": "B.Cu",
"x": 16.1,
"y": -9.7
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{
"amps": -0.0011442169750410618,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.700000000000003,
"y": -10.9
},
{
"amps": 0.002945958435889199,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.900000000000002,
"y": -10.9
},
{
"amps": -0.006601893372608572,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.5,
"y": -10.7
},
{
"amps": 0.001877049271751872,
"from": "F.Cu",
"to": "B.Cu",
"x": 25.1,
"y": -10.7
},
{
"amps": -0.010635007944950129,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.700000000000003,
"y": -10.5
},
{
"amps": -0.006876320786319861,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.900000000000002,
"y": -10.5
},
{
"amps": 0.004506035220093775,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.5,
"y": -7.299999999999999
},
{
"amps": 0.004712740790172995,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.700000000000003,
"y": -7.299999999999999
},
{
"amps": 0.002400234302770221,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.3,
"y": -7.1
},
{
"amps": 0.0027407705296955223,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.900000000000002,
"y": -7.1
},
{
"amps": 0.0029738923364980834,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.5,
"y": -6.899999999999999
},
{
"amps": 0.003100758546302981,
"from": "F.Cu",
"to": "B.Cu",
"x": 24.700000000000003,
"y": -6.899999999999999
},
{
"amps": -0.00010883814759014196,
"from": "F.Cu",
"to": "B.Cu",
"x": 22.700000000000003,
"y": -5.1
},
{
"amps": -0.00011867112175821175,
"from": "F.Cu",
"to": "B.Cu",
"x": 22.5,
"y": -4.899999999999999
},
{
"amps": -0.00010089563562392101,
"from": "F.Cu",
"to": "B.Cu",
"x": 22.700000000000003,
"y": -4.699999999999999
}
],
"voltKnown": false,
"voltRange": [
-0.000460558633951238,
0.0001235709157281084
]
}
],
"rows": 100,
"topRailV": 0.0,
"voltMax": 0.0019119768499298668,
"voltMin": -0.00005651709990106405,
"x0": 0.0,
"y0": -20.0
},
"fragments": [
{
"areasMm2": [
286.48,
4.08
],
"isolated": 0,
"joinedThroughVias": 1,
"layer": "F.Cu",
"nearestGap": {
"blockingNet": "BOOT",
"blockingPad": "C5.1",
"from": [
13.9,
-8.7
],
"gapMm": 0.4,
"joinedThroughVias": true,
"pieceAreaMm2": 4.08,
"to": [
13.9,
-9.1
]
},
"net": "GND",
"pieces": 2
},
{
"areasMm2": [
456.52
],
"layer": "B.Cu",
"net": "GND",
"pieces": 1
},
{
"areasMm2": [
20.08
],
"layer": "F.Cu",
"net": "SW",
"pieces": 1
},
{
"areasMm2": [
74.36,
12.84
],
"isolated": 0,
"joinedThroughVias": 1,
"layer": "F.Cu",
"nearestGap": {
"blockingNet": "GND",
"blockingPad": null,
"from": [
2.9,
-15.9
],
"gapMm": 1.0,
"joinedThroughVias": true,
"pieceAreaMm2": 12.84,
"to": [
2.3,
-15.1
]
},
"net": "VIN",
"pieces": 2
},
{
"areasMm2": [
75.12
],
"layer": "F.Cu",
"net": "VOUT",
"pieces": 1
}
],
"heat": {
"budgetC": 55.0,
"jouleW": 0.003,
"movingAirWPerM2K": 25.0,
"peakRiseC": 49.182159423828125,
"peakRiseMovingC": 29.02578353881836,
"sourcesModelled": 2,
"status": "parts modelled",
"stillAirWPerM2K": 10.0,
"tabW": 0.37
},
"heatsinks": [],
"inputIdentity": {
"algorithm": "sha256",
"board": "746b14c3282d4458d4423180270cbbfad738133ef256cd511fdcd95e6fa4fee5",
"solverVersion": "0.7.20",
"spec": "7e3eb04a7a0049626b542e9f8261d4ac9f0ff21322a5f1735f88a369e0049502"
},
"issues": [
{
"action": {
"connectors": [
"J7",
"J5",
"J2"
],
"type": "review",
"what": "ground cabling"
},
"at": [
5.0,
-7.0
],
"fix": "Return each cable's ground on its own connector and route paired wires together (twisted or adjacent), or tie the grounds at one point.",
"kind": "ground-loop-risk",
"layer": "F.Cu",
"net": "GND",
"reference": null,
"severity": "low",
"what": "3 connectors carry GND off the board (J7, J5, J2): cables that meet off the board close a loop"
},
{
"action": {
"count": 1,
"from": [
20.4,
0.0
],
"insetMm": 0.6,
"net": "GND",
"pitchMm": 9.2,
"points": [
[
16.0,
-0.6
]
],
"to": [
12.0,
0.0
],
"type": "add-vias"
},
"at": [
16.0,
0.0
],
"fix": "Add 1 ground via(s) along the edge (the action lists each point) from (20.4, 0.0) to (12.0, 0.0), one every 9.2 mm, about 0.6 mm in from the edge.",
"kind": "stitching-gap",
"layer": "F.Cu",
"net": "GND",
"reference": null,
"severity": "low",
"what": "GND: 8.8 mm of board edge with no ground via within 4.6 mm"
},
{
"action": {
"count": 1,
"from": [
7.6,
-20.0
],
"insetMm": 0.6,
"net": "GND",
"pitchMm": 9.2,
"points": [
[
11.2,
-19.4
]
],
"to": [
14.8,
-20.0
],
"type": "add-vias"
},
"at": [
11.2,
-20.0
],
"fix": "Add 1 ground via(s) along the edge (the action lists each point) from (7.6, -20.0) to (14.8, -20.0), one every 9.2 mm, about 0.6 mm in from the edge.",
"kind": "stitching-gap",
"layer": "F.Cu",
"net": "GND",
"reference": null,
"severity": "low",
"what": "GND: 7.6 mm of board edge with no ground via within 4.6 mm"
},
{
"action": {
"between": [
"VIN",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J1.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
2.0,
-14.0
],
"fix": "If J1 faces the outside world, add a TVS (low capacitance, for a signal) from VIN to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"layer": "F.Cu",
"net": "VIN",
"reference": "J1",
"severity": "low",
"what": "J1 pin 1 (VIN): no protection diode from VIN to GND"
},
{
"action": {
"between": [
"EN",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J3.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
2.0,
-6.0
],
"fix": "If J3 faces the outside world, add a TVS (low capacitance, for a signal) from EN to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"layer": "F.Cu",
"net": "EN",
"reference": "J3",
"severity": "low",
"what": "J3 pin 1 (EN): no protection diode from EN to GND"
},
{
"action": {
"between": [
"VOUT",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J4.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
26.0,
-14.0
],
"fix": "If J4 faces the outside world, add a TVS (low capacitance, for a signal) from VOUT to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"layer": "F.Cu",
"net": "VOUT",
"reference": "J4",
"severity": "low",
"what": "J4 pin 1 (VOUT): no protection diode from VOUT to GND"
},
{
"action": {
"between": [
"VMON",
"GND"
],
"maxDistMm": 3.0,
"nearPin": "J6.1",
"signal": true,
"type": "add-part",
"what": "TVS diode"
},
"at": [
26.0,
-6.0
],
"fix": "If J6 faces the outside world, add a TVS (low capacitance, for a signal) from VMON to GND within 3 mm of the pin, before any chip.",
"kind": "esd-unprotected",
"layer": "F.Cu",
"net": "VMON",
"reference": "J6",
"severity": "low",
"what": "J6 pin 1 (VMON): no protection diode from VMON to GND"
},
{
"action": {
"byMm": 0.7,
"gap": {
"blockingNet": "BOOT",
"blockingPad": "C5.1",
"from": [
13.9,
-8.7
],
"gapMm": 0.4,
"joinedThroughVias": true,
"pieceAreaMm2": 4.08,
"to": [
13.9,
-9.1
]
},
"layer": "F.Cu",
"net": "GND",
"orRotateDeg": 90,
"pad": "1",
"reference": "C5",
"type": "move",
"why": "join a split pour"
},
"at": [
13.9,
-8.9
],
"fix": "Rotate C5 90° or move it about 0.7 mm so its 1 pad (BOOT) leaves the gap and GND's pour on F.Cu closes; re-pour and re-run.",
"kind": "pour-fragmented",
"layer": "F.Cu",
"net": "GND",
"reference": "C5",
"severity": "low",
"what": "GND: its pour on F.Cu is in 2 pieces (1 joined through vias, 0 isolated); the nearest one (4.1 mm², joined only through the net's vias on other layers) is 0.4 mm from the main piece"
},
{
"action": {
"at": [
2.6,
-15.5
],
"gap": {
"blockingNet": "GND",
"blockingPad": null,
"from": [
2.9,
-15.9
],
"gapMm": 1.0,
"joinedThroughVias": true,
"pieceAreaMm2": 12.84,
"to": [
2.3,
-15.1
]
},
"layer": "F.Cu",
"net": "GND",
"type": "reroute",
"why": "join a split pour"
},
"at": [
2.6,
-15.5
],
"fix": "Reroute GND out of the 1.0 mm gap at (2.6, -15.5) on F.Cu so VIN's pour closes; re-pour and re-run.",
"kind": "pour-fragmented",
"layer": "F.Cu",
"net": "VIN",
"reference": null,
"severity": "low",
"what": "VIN: its pour on F.Cu is in 2 pieces (1 joined through vias, 0 isolated); the nearest one (12.8 mm², joined only through the net's vias on other layers) is 1.0 mm from the main piece"
}
],
"log": [
"GND: 1 A, 2 layer(s), 1322 iterations, residual 9.8e-8",
"SW: 1 A, 1 layer(s), 144 iterations, residual 7.6e-8",
"VIN: 0.6 A, 2 layer(s), 439 iterations, residual 8.9e-8",
"VOUT: 1 A, 2 layer(s), 744 iterations, residual 9.1e-8",
"heat, still air: 858 iterations, residual 9.7e-8",
"heat, moving air: 819 iterations"
],
"method": "Copper fraction per cell from the board's filled polygons, tracks, pads and vias, drill holes left empty; DC conduction per loaded net between its terminals (σ 5.8e4 S/mm × thickness), each via and plated pad barrel joining its layers around its wall; heat: the board's 2 copper layer(s) (F.Cu, B.Cu) coupled through the dielectric and every via and plated pad barrel, copper 0.40 W/mm·K, FR4 0.3/0.6 W/m·K, 10 (still) or 25 (moving) W/m²K to the air on both faces; one steady-state solve each. Optional rectangular heatsinks use a 3D finite-volume conducting block with specified conductivity, contact resistance and air loss on exposed faces. Copper thickness may differ by layer; Joule heat is deposited on its source layer. This remains a screening model: rectangular board outline, prescribed chip watts and convection; no fins, radiation, airflow solve or junction-temperature qualification.",
"nets": [
{
"amps": 1.0,
"converged": true,
"copperMm2": 699.4,
"iterations": 1322,
"jouleW": 0.001,
"layers": [
"F.Cu",
"B.Cu"
],
"net": "GND",
"peakAt": [
15.700000000000001,
-9.7
],
"peakJ": 41.724796295166016,
"peakLayer": "F.Cu",
"platedConnections": [
{
"amps": 0.03740632888606848,
"at": [
17.55,
-13.55
],
"barrelAreaMm2": 0.02552544031041707,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 1.4654528357265106,
"plated": false,
"resolvedPerimeterFraction": 0.8719512195121951,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.5211372872275885,
"at": [
15.7,
-9.25
],
"barrelAreaMm2": 0.02552544031041707,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 20.416387764128384,
"plated": false,
"resolvedPerimeterFraction": 0.9146341463414633,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.02824153569541432,
"at": [
16.1,
-14.5
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.8460762365047335,
"plated": false,
"resolvedPerimeterFraction": 1.0,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.20989087196052622,
"at": [
10.1,
-10.6
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 6.288031959037334,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.4788626813261329,
"at": [
16.3,
-9.6
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 14.346044761466933,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.23577481900286806,
"at": [
18.7,
-8.4
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 7.063478193111226,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747663,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 4.0320815206713973e-10,
"at": [
14.0,
-9.4
],
"barrelAreaMm2": 0.02552544031041707,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 1.5796325045276038e-8,
"plated": false,
"resolvedPerimeterFraction": 1.0,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -2.715341504814595e-10,
"at": [
11.5,
-11.5
],
"barrelAreaMm2": 0.02552544031041707,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 1.063778517350962e-8,
"plated": false,
"resolvedPerimeterFraction": 1.0,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.08265251088832504,
"at": [
8.0,
-4.0
],
"barrelAreaMm2": 0.06322455215349458,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 1.3072850352132803,
"plated": true,
"resolvedPerimeterFraction": 0.47654320987654314,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.05489658431475644,
"at": [
26.0,
-10.0
],
"barrelAreaMm2": 0.06322455215349458,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.8682795282041735,
"plated": true,
"resolvedPerimeterFraction": 0.47654320987654314,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.03819129339340051,
"at": [
2.0,
-10.0
],
"barrelAreaMm2": 0.06322455215349458,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.6040579504727986,
"plated": true,
"resolvedPerimeterFraction": 0.47654320987654314,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.022255452523450972,
"at": [
26.0,
-18.0
],
"barrelAreaMm2": 0.09621127501618743,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.2313185488884387,
"plated": true,
"resolvedPerimeterFraction": 0.831168831168831,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.024225594878993246,
"at": [
2.0,
-18.0
],
"barrelAreaMm2": 0.09621127501618743,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.25179579914014566,
"plated": true,
"resolvedPerimeterFraction": 0.831168831168831,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.05150325677371115,
"at": [
26.0,
-2.0
],
"barrelAreaMm2": 0.09621127501618743,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.5353141486280666,
"plated": true,
"resolvedPerimeterFraction": 0.831168831168831,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.030360829698201763,
"at": [
2.0,
-2.0
],
"barrelAreaMm2": 0.09621127501618743,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.31556415496098134,
"plated": true,
"resolvedPerimeterFraction": 0.831168831168831,
"to": "B.Cu",
"unconnected": false
}
],
"platedPads": 7,
"residual": 9.752066870900384e-8,
"vias": 8
},
{
"amps": 1.0,
"converged": true,
"copperMm2": 18.1,
"iterations": 144,
"jouleW": 0.001,
"layers": [
"F.Cu"
],
"net": "SW",
"peakAt": [
15.700000000000001,
-11.5
],
"peakJ": 32.402366638183594,
"peakLayer": "F.Cu",
"platedConnections": [],
"platedPads": 0,
"residual": 7.606945734569967e-8,
"vias": 0
},
{
"amps": 1.0,
"converged": true,
"copperMm2": 106.9,
"iterations": 744,
"jouleW": 0.0,
"layers": [
"F.Cu",
"B.Cu"
],
"net": "VOUT",
"peakAt": [
25.1,
-10.5
],
"peakJ": 7.689986228942871,
"peakLayer": "F.Cu",
"platedConnections": [
{
"amps": 0.00002392141267176485,
"at": [
8.2,
-14.5
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.0007166514959910547,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.00067814190535031,
"at": [
22.7,
-4.9
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.020316166843154456,
"plated": false,
"resolvedPerimeterFraction": 1.0,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 3.0070923319983335e-10,
"at": [
20.1,
-4.6
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 9.008820874753308e-9,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.020434431371278552,
"at": [
24.8,
-10.7
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.6121864963785559,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.020434431725533574,
"at": [
24.6,
-7.1
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.6121865069915324,
"plated": false,
"resolvedPerimeterFraction": 0.9065420560747662,
"to": "B.Cu",
"unconnected": false
},
{
"amps": 0.0006781404781236045,
"at": [
22.1,
-15.3
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.020316124085472557,
"plated": false,
"resolvedPerimeterFraction": 1.0,
"to": "B.Cu",
"unconnected": false
},
{
"amps": -0.000023915793650526274,
"at": [
7.8,
-12.9
],
"barrelAreaMm2": 0.03337942194439156,
"fallback": false,
"from": "F.Cu",
"meanBarrelJ": 0.0007164831581076744,
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