STCMB1TR

{
  "slug": "stcmb1tr",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics AC-DC Controllers & Regulators, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "stcmb1tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stcmb1tr.kicad_sym",
    "stcmb1tr.kicad_mod",
    "stcmb1tr.glb",
    "stcmb1tr.step",
    "stcmb1tr.lbr",
    "docs/hero.png",
    "docs/stcmb1tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stcmb1tr-hero.glb",
    "stcmb1tr-hero.overlay.json",
    "stcmb1tr-etched.glb"
  ],
  "component": {
    "mpn": "STCMB1TR",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Power Supply Chip",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://www.st.com/resource/en/datasheet/stcmb1tr.pdf",
    "parts": {
      "symbol": "stcmb1tr.kicad_sym",
      "footprint": "stcmb1tr.kicad_mod",
      "model_3d": "stcmb1tr-hero.glb",
      "model_3d_plain": "stcmb1tr-etched.glb",
      "model_3d_step": "stcmb1tr-etched.step",
      "model_3d_step_plain": "stcmb1tr.step",
      "lbr": "stcmb1tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C472579"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T22:21:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "HV",
        "type": "input",
        "description": "800 V-rated high-voltage start-up generator and ac sensing input, connected to the ac side of the bridge via two diodes and a mandatory 3 k to 9 k series resistor; it also supplies X-capacitor discharge."
      },
      {
        "number": "2",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; high-voltage spacer for creepage distance."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "PFC output voltage feedback with 2.5 V reference, 7% overvoltage stop, latch-off below 0.5 V, HB enabled above 2.4 V and inhibited below 1.75 V (dc brown-out)."
      },
      {
        "number": "4",
        "name": "COMP",
        "type": "output",
        "description": "PFC error amplifier output; the PFC gate driver is inhibited (burst mode) when the voltage falls below 1 V (typ.)."
      },
      {
        "number": "5",
        "name": "TON",
        "type": "passive",
        "description": "Sets PFC MOSFET maximum on-time via a parallel resistor and capacitor to ground, generating a ramp compared with COMP."
      },
      {
        "number": "6",
        "name": "ZCD",
        "type": "input",
        "description": "Boost inductor demagnetization sensing input; a negative-going edge triggers PFC MOSFET turn-on (absolute maximum 3 mA)."
      },
      {
        "number": "7",
        "name": "CF",
        "type": "passive",
        "description": "Timing capacitor for the HB oscillator, connected to GND and charged by the current set at RFMIN."
      },
      {
        "number": "8",
        "name": "CSS",
        "type": "passive",
        "description": "HB soft-start capacitor to GND with resistor to RFMIN; burst mode and second-level OCP are inhibited while below 0.3 V."
      },
      {
        "number": "9",
        "name": "RFMIN",
        "type": "output",
        "description": "Accurate 2 V reference; resistor to GND sets the maximum timeshift and optocoupler phototransistor sets the minimum (max source current 2 mA)."
      },
      {
        "number": "10",
        "name": "STBY",
        "type": "input",
        "description": "HB burst mode threshold input with 1.25 V reference and 40 mV restart hysteresis; requires RC filter with R > 100 ohm and C > 100 pF; tie to RFMIN if unused."
      },
      {
        "number": "11",
        "name": "ISEN_PFC",
        "type": "input",
        "description": "PFC inductor current sense input with -25 mV PWM start threshold and -0.5 V overcurrent threshold; requires RC filter with R > 100 ohm and C > 100 pF."
      },
      {
        "number": "12",
        "name": "ISEN_HB",
        "type": "input",
        "description": "HB resonant current sense input with 0.8 V soft-start discharge threshold and 1.5 V immediate shutdown threshold; RC filter R > 50 ohm, C > 100 pF recommended; do not short to ground."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for signal circuits, the PFC gate driver and the HB low-side gate driver."
      },
      {
        "number": "14",
        "name": "GD_PFC",
        "type": "output",
        "description": "PFC gate driver totem pole output with 0.6 A source and 0.8 A sink minimum, actively pulled to GND during UVLO."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Signal part supply, operating range 10 to 20 V, requiring at least 22 uF electrolytic capacitor to GND (absolute maximum 21 V)."
      },
      {
        "number": "16",
        "name": "LVG",
        "type": "output",
        "description": "HB low-side gate drive output with 0.3 A source and 0.8 A sink minimum, actively pulled to GND during UVLO."
      },
      {
        "number": "17",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; high-voltage spacer for creepage distance."
      },
      {
        "number": "18",
        "name": "OUT",
        "type": "passive",
        "description": "High-side gate drive floating ground and current return for the high-side gate drive current."
      },
      {
        "number": "19",
        "name": "HVG",
        "type": "output",
        "description": "HB high-side gate drive output with 0.3 A source and 0.8 A sink minimum, with internal resistor to OUT during UVLO."
      },
      {
        "number": "20",
        "name": "BOOT",
        "type": "power_in",
        "description": "High-side gate drive floating supply, bootstrap capacitor to OUT fed by internal synchronous bootstrap diode (absolute maximum 620 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet lists only the SO20W package (300 mil wide SOIC-20), which matches the hint; pin order tak; Pin types for COMP, RFMIN, OUT, HV and timing pins are inferred from the function text; the datashee; Table 1 lists N.C. for pin 17 on page 6 together with pin 2."
        ],
        "pages_sent": 12,
        "cost_usd": 0.1346,
        "at": "2026-10-22T22:21:30"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/stcmb1tr.pdf",
        "pages": 59,
        "sha256": "6782dcbd1e92b66a",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stcmb1tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          12.8,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stcmb1tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ccd5146f32a1ce2fd7b8315952f11315afc3eea886c8b72310a1b895378b6768",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}