DK912

{
  "schema_version": 1,
  "type": "component",
  "slug": "dk912",
  "title": "DK912",
  "brief": "Shenzhen DongKe Semicon AC-DC Controllers and Regulators, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "dk912"
  ],
  "component": {
    "mpn": "DK912",
    "manufacturer": "Shenzhen DongKe Semicon",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "AC-DC Controllers and Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205271600_Shenzhen-DongKe-Semicon-DK912_C3010422.pdf",
    "parts": {
      "symbol": "dk912.kicad_sym",
      "footprint": "dk912.kicad_mod",
      "model_3d": "dk912-etched.glb",
      "model_3d_plain": "dk912.glb",
      "model_3d_step": "dk912-etched.step",
      "model_3d_step_plain": "dk912.step",
      "lbr": "dk912.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "HV",
        "type": "power_in",
        "description": "High-voltage startup pin. Connects through an external ~2.2 MΩ resistor to the OC pins (7,8) to supply the internal high-voltage startup current source that charges the VDD storage capacitor."
      },
      {
        "number": "2",
        "name": "IS",
        "type": "input",
        "description": "Peak current sense / limit setting pin. An external resistor Ris from IS to GND sets the maximum peak current: Ipmax = 400 mV / Ris (typical 660 mA). IS max turn-on threshold 360-440 mV; min 80-120 mV."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Primary-side feedback input. Senses the reflected VOR voltage from the primary (or auxiliary) winding via an external resistor divider to regulate output voltage/current against the internal 2.5 V reference. Short-circuit threshold ~1.3 V, open-load protection ~3.7 V."
      },
      {
        "number": "4",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip positive supply. Requires an external 10 µF-47 µF capacitor to GND. Typical operating voltage 4.7 V (range 4-6 V); startup ~4.7 V; restart ~3.6 V; OVP ~6.2 V. Self-supply technology holds VDD near 4.7 V without an auxiliary winding."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the controller and internal power MOSFET source. Pins 5 and 6 are internally common and both must be connected to system ground."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the controller and internal power MOSFET source. Pins 5 and 6 are internally common and both must be connected to system ground."
      },
      {
        "number": "7",
        "name": "OC",
        "type": "power_out",
        "description": "Drain of the internal 700 V high-voltage power MOSFET. Connects to the flyback transformer primary winding. Pins 7 and 8 are internally tied together; power MOSFET withstand voltage 700 V, peak current 700 mA."
      },
      {
        "number": "8",
        "name": "OC",
        "type": "power_out",
        "description": "Drain of the internal 700 V high-voltage power MOSFET. Connects to the flyback transformer primary winding. Pins 7 and 8 are internally tied together; power MOSFET withstand voltage 700 V, peak current 700 mA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205271600_Shenzhen-DongKe-Semicon-DK912_C3010422.pdf",
        "pages": 9,
        "sha256": "b6f27ef42f4a4f78",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "dk912.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "dk912-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5424089792cf3877df3c72be436634e70d59a023b7cc25c17726a0511e1f0f65",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen DongKe Semicon",
      "Package": "SOP-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "dk912"
  ],
  "discovery_pitch": "DK912 (Shenzhen DongKe Semicon) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "dk912.kicad_sym",
    "dk912.kicad_mod",
    "dk912.glb",
    "dk912.step",
    "dk912.lbr",
    "docs/hero.png",
    "docs/dk912-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "dk912-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "DK912SOP",
      "kind": "packaging"
    },
    {
      "mpn": "DK912SOP8",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T19:48:14.360Z"
}