VIPER35HDTR

{
  "slug": "viper35hdtr",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics AC-DC Controllers & Regulators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "viper35hdtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "viper35hdtr.kicad_sym",
    "viper35hdtr.kicad_mod",
    "viper35hdtr.glb",
    "viper35hdtr.step",
    "viper35hdtr.lbr",
    "docs/hero.png",
    "docs/viper35hdtr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "viper35hdtr-hero.glb",
    "viper35hdtr-hero.overlay.json",
    "viper35hdtr-etched.glb"
  ],
  "component": {
    "mpn": "VIPER35HDTR",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Power Management ICs",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://www.st.com/resource/en/datasheet/viper35hdtr.pdf",
    "parts": {
      "symbol": "viper35hdtr.kicad_sym",
      "footprint": "viper35hdtr.kicad_mod",
      "model_3d": "viper35hdtr-hero.glb",
      "model_3d_plain": "viper35hdtr-etched.glb",
      "model_3d_step": "viper35hdtr-etched.step",
      "model_3d_step_plain": "viper35hdtr.step",
      "lbr": "viper35hdtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2970727",
      "digikey": "497-VIPER35HDTR-ND",
      "mouser": "511-VIPER35HDTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T18:57:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-VIPER35HDTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-VIPER35HDTR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground and source of the power MOSFET."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground and source of the power MOSFET."
      },
      {
        "number": "3",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; it can be connected to GND."
      },
      {
        "number": "4",
        "name": "N.A.",
        "type": "passive",
        "description": "Not available for user; it is mechanically connected to the controller die pad of the frame and should be connected to GND (pins 1, 2) to improve noise immunity."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage of the control section that provides the charging current of the external capacitor during power-up; the absolute maximum VDD is self-limited and the input current IDD is rated at 25 mA."
      },
      {
        "number": "6",
        "name": "ZCD",
        "type": "input",
        "description": "Multifunction pin providing zero-current detection for quasi-resonant operation, drain current limit (IDlim) setup via RLIM, feed-forward compensation setup via RFF, and output overvoltage protection setup via the ROVP/RLIM divider; the input pin voltage is self-limited with IZCD = 1 mA."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Control input for duty cycle control, where a voltage below VFBbm activates burst-mode operation and a level close to VFBlin means the cycle-by-cycle overcurrent set-point is close; the absolute input voltage range is -0.3 V to 5.5 V."
      },
      {
        "number": "8",
        "name": "BR",
        "type": "input",
        "description": "Brown-out protection input with hysteresis that shuts down (does not latch) the device when below VBRth and restarts when the voltage exceeds VBRth + VBRhyst; it must be connected to ground when not used."
      },
      {
        "number": "9",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "10",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "11",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "12",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "13",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin rated for 800 V drain-to-source (ground); the built-in high voltage start-up bias current is drawn from this pin, and it is connected to the metal frame to facilitate heat dissipation."
      },
      {
        "number": "14",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin rated for 800 V drain-to-source (ground); the built-in high voltage start-up bias current is drawn from this pin, and it is connected to the metal frame to facilitate heat dissipation."
      },
      {
        "number": "15",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin rated for 800 V drain-to-source (ground); the built-in high voltage start-up bias current is drawn from this pin, and it is connected to the metal frame to facilitate heat dissipation."
      },
      {
        "number": "16",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin rated for 800 V drain-to-source (ground); the built-in high voltage start-up bias current is drawn from this pin, and it is connected to the metal frame to facilitate heat dissipation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 4 (N.A.) is labelled 'Not available for user' but the datasheet recommends connecting it to GND;; The datasheet does not give an ERC class for DRAIN; passive was chosen because it is the MOSFET drai; ZCD, FB and BR are typed as input based on the function descriptions. The datasheet does not state t"
        ],
        "pages_sent": 19,
        "cost_usd": 0.0715,
        "at": "2026-10-30T18:56:51"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/viper35hdtr.pdf",
        "pages": 44,
        "sha256": "99aabfeaadc8ea2d",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "viper35hdtr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "viper35hdtr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2aae5e5ae1c62353e721686b8db052e68e12c3e881bac31083d0b1307c419ab3",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SO16N",
      "source_page": 39,
      "D": {
        "nom_mm": 9.9,
        "range_mm": [
          9.8,
          10.0
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4.0
        ]
      },
      "E": {
        "nom_mm": 6.0,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.75,
        "range_mm": [
          null,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "viper35hdtr.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}