ESC G431

{
 "$shape": "adom-board-viewer-config/0.2",
 "_note": "Path B ESC viewer; content from the designer's schematic notes; captions author-asserted; behaviours illustrative.",
 "board": {
  "name": "ESC G431",
  "subtitle": "ECS_G431 v2.0.1",
  "rev": "as-drawn from ECS_G431_v2.0.1.kicad_pcb",
  "source": "KiCad project (4-layer PCB + STEP export)",
  "size_mm": [
   64.0,
   74.0
  ],
  "thickness_mm": 1.6,
  "copper_layers": 4
 },
 "blocks": [
  {
   "id": "power",
   "label": "Power in / rails",
   "color": "#f5a524",
   "short": "SMBJ26A TVS, TPSM365 buck to 12V, AP2112K-3.3"
  },
  {
   "id": "mcu",
   "label": "Microcontroller",
   "color": "#3b82f6",
   "short": "STM32G431CBT6 + 8 MHz crystal (AM32)"
  },
  {
   "id": "gate",
   "label": "Gate driver",
   "color": "#a855f7",
   "short": "DRV8300, external deadtime"
  },
  {
   "id": "bridge",
   "label": "3-phase bridge",
   "color": "#ef4444",
   "short": "6x BSC016N06NS MOSFETs"
  },
  {
   "id": "isense",
   "label": "Current sense",
   "color": "#06b6d4",
   "short": "INA181A2, 25 mV/A, 131 A full-scale"
  },
  {
   "id": "status",
   "label": "Status LEDs",
   "color": "#22c55e",
   "short": "2x green + 1 blue"
  },
  {
   "id": "debug",
   "label": "Debug",
   "color": "#8b5cf6",
   "short": "STDC14 SWD (J1)"
  },
  {
   "id": "pins",
   "label": "Machine pins",
   "color": "#64748b",
   "short": "contacts + corner MP1-4"
  }
 ],
 "modes": {
  "assembly": {
   "label": "Assembly",
   "blurb": "Each grouping seats onto the board while its caption explains it.",
   "order": [
    "pins",
    "power",
    "bridge",
    "gate",
    "isense",
    "mcu",
    "status",
    "debug"
   ],
   "timing": {
    "fall_s": 0.47,
    "stagger_s": 0.027,
    "dwell_s": 6.5,
    "rest_s": 4.0,
    "drop_height_mm": 16
   },
   "intro": {
    "d": 6,
    "eyebrow": "ESC G431",
    "head": "STM32G431 + DRV8300 3-phase ESC, AM32",
    "rows": [
     [
      "Drive",
      "3-phase, 6x BSC016N06NS"
     ],
     [
      "MCU",
      "STM32G431CBT6"
     ],
     [
      "Sense",
      "INA181A2, 25 mV/A"
     ]
    ],
    "note": "A single-motor ESC: a synchronous buck makes 12 V for the gate driver, the DRV8300 drives a 6-MOSFET bridge, and an INA181 senses phase current. VBAT operating 26 V (TVS standoff), transient clamp ~42 V."
   },
   "captions": {
    "pins": {
     "eyebrow": "Datum",
     "head": "Machine-pin contacts",
     "rows": [
      [
       "Corners",
       "MP1-4"
      ]
     ],
     "note": "Locates the board and carries VBAT, phases and sense to the cell. GND and 3v3 contacts are sense-only; GND_OUT is battery-out only."
    },
    "power": {
     "eyebrow": "Power",
     "head": "Clamped, bucked, regulated",
     "rows": [
      [
       "Protection",
       "D1 SMBJ26A TVS (~42 V clamp)"
      ],
      [
       "Buck",
       "TPSM365R6V5 module (U2) -> +12 V"
      ],
      [
       "MCU rail",
       "AP2112K-3.3 (U3)"
      ],
      [
       "Range",
       "+18.0 to +25.2 V in"
      ]
     ],
     "note": "VBAT is TVS-clamped, a synchronous buck module makes 12 V for the gate driver, and the AP2112K makes 3.3 V for the MCU. Absolute max: VBAT operating 26 V, transient clamp ~42 V."
    },
    "bridge": {
     "eyebrow": "Power stage",
     "head": "Three half-bridges",
     "rows": [
      [
       "MOSFETs",
       "6x BSC016N06NS (Q1-Q6)"
      ],
      [
       "Phases",
       "A / B / C"
      ]
     ],
     "note": "Three half-bridges drive the motor's three phases. Deadtime is configured externally at the gate driver."
    },
    "gate": {
     "eyebrow": "Gate driver",
     "head": "DRV8300, bootstrap-fed",
     "rows": [
      [
       "Part",
       "DRV8300DPWR (U4)"
      ],
      [
       "Drive",
       "source 750 mA, sink 1.5 A"
      ],
      [
       "Bootstrap",
       "C_BST >= 8.6 nF, C_GVDD >= 10x"
      ]
     ],
     "note": "The DRV8300 level-shifts and drives the six gates from the 12 V rail, deadtime set externally; the bootstrap caps are sized from the MOSFET gate charge."
    },
    "isense": {
     "eyebrow": "Feedback",
     "head": "Low-side current sense",
     "rows": [
      [
       "Amp",
       "INA181A2 (U6), gain 50 V/V"
      ],
      [
       "Shunt",
       "0.5 mOhm"
      ],
      [
       "Scale",
       "25 mV/A, 58.5 A -> 1.46 V, full 131 A"
      ]
     ],
     "note": "A 0.5 mOhm shunt and INA181A2 give 25 mV/A into the MCU ADC; total error about +/-0.47 A (0.8%). A back-EMF divider/filter feeds commutation sensing."
    },
    "mcu": {
     "eyebrow": "Control",
     "head": "STM32G431 running AM32",
     "rows": [
      [
       "Part",
       "STM32G431CBT6 (U5)"
      ],
      [
       "Clock",
       "8 MHz crystal (Y1)"
      ],
      [
       "Reset",
       "SW1 tact"
      ]
     ],
     "note": "An STM32G431 running AM32 firmware. Max expected unloaded ERPM 300k, min cycle period 200 us. BOOT0 is not routed, so the DSHOT-wire bootloader (or SWD) is the flashing path."
    },
    "status": {
     "eyebrow": "Indicators",
     "head": "Two green, one blue",
     "rows": [
      [
       "Green",
       "LED1 ~0.49 mA (12 V), LED2 ~0.45 mA (3.3 V)"
      ],
      [
       "Blue",
       "LED3 ~0.51 mA"
      ]
     ],
     "note": "Illustrative: rail/status indicators, LED currents as annotated on the schematic."
    },
    "debug": {
     "eyebrow": "Debug",
     "head": "SWD landing",
     "rows": [
      [
       "Connector",
       "J1 STDC14"
      ]
     ],
     "note": "ST STDC14 SWD connector, and a jumper selects an external 5 V."
    }
   }
  },
  "static": {
   "label": "Static",
   "blurb": "The seated board. Camera is yours; hover a part, click legend rows to isolate a section.",
   "functions": {
    "power_leds": {
     "label": "Power",
     "refs": [
      "LED1",
      "LED2",
      "LED3"
     ],
     "color": "#39ff88",
     "default": false,
     "_src": "AUTHOR/illustrative: LED1/LED2 green rail indicators, LED3 blue, per the schematic notes."
    }
   }
  }
 },
 "tooltips": {
  "enabled": true,
  "_note": "Measured from geometry + schematic notes; no datasheet citations."
 }
}