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Ray Set visibility: public 7324546 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "sn3948",
  "title": "SN3948",
  "brief": "ISSI Integrated Silicon Solution DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "sn3948",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN3948",
    "manufacturer": "ISSI Integrated Silicon Solution",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838754354794496",
    "parts": {
      "symbol": "sn3948.kicad_sym",
      "footprint": "sn3948.kicad_mod",
      "model_3d": "sn3948-hero.glb",
      "model_3d_plain": "sn3948-etched.glb",
      "model_3d_step": "sn3948-etched.step",
      "model_3d_step_plain": "sn3948.step",
      "lbr": "sn3948.lbr"
    },
    "distributor_links": {
      "lcsc": "C3041112"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T02:25:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Chip supply pin, internally regulated to 5 V typical (clamp 4.4 V to 5.6 V at Rin = 10 kΩ), with a maximum VCC input current of 10 mA before the clamp may fail."
      },
      {
        "number": "2",
        "name": "TOFF",
        "type": "input",
        "description": "Resistor to GND sets the minimum constant off-time of the NMOS; the datasheet gives 10 µs at Rext = 250 kΩ and recommends about 1 µs typical."
      },
      {
        "number": "3",
        "name": "ADJ",
        "type": "input",
        "description": "Chip enable and input peak-current threshold control: below 0.5 V the NMOS is held off, 0.5 V to 2.4 V sets VCSTH = VADJ/10, above 2.4 V VCSTH is fixed at 0.24 V, and when floating it is pulled up internally to 4.5 V (VCSTH = 0.24 V)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the controller; the Rfb ground return should run short and wide to this pin for output-current accuracy."
      },
      {
        "number": "5",
        "name": "GATE",
        "type": "output",
        "description": "Gate drive output for the external NMOS switch, with gate drive current set by switching frequency and the NMOS gate charge."
      },
      {
        "number": "6",
        "name": "CS",
        "type": "input",
        "description": "Input peak-current sense pin fed from the resistor Rcs between the NMOS source and GND; the sense threshold VCSTH is 215 mV to 265 mV (240 mV typical) at ADJ = 5 V."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Output-current sense pin fed from the external sense resistor Rfb in series with the LED string; the feedback threshold is 0.29 V to 0.31 V (0.3 V typical), so Iout = 0.3 V / Rfb."
      },
      {
        "number": "8",
        "name": "OVP",
        "type": "input",
        "description": "Overvoltage-protection sense pin: when the voltage on this pin exceeds 1 V (VOVP-TH 0.9 V to 1.1 V) the NMOS is turned off."
      }
    ],
    "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: The datasheet is by SI-EN Technology (矽恩微电子), not ISSI Integrated Silicon Solution as stated in the ; The datasheet's ordering table lists the SOP-8 variant as SN3948ID08E (2500 pcs/reel, RoHS, -40 °C t"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0635,
        "at": "2026-10-18T02:23:41"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838754354794496",
        "pages": 13,
        "sha256": "01443d38f21bc0fb",
        "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": "sn3948.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn3948-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b1a98950a94bd677f101664761942a7885a66dc99542602c86232ab3122853e7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ISSI Integrated Silicon Solution",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "01443d38f21bc0fb1f50faec2f6eafea9a9b518f011b052c4c52fbc1c6eed40d",
      "rows": [
        {
          "name": "VCC to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CS, ADJ, GATE, TOFF, OVP, FB voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "VCC maximum input current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD human body model",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3500,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range (ordering info SN3948ID08E, industrial grade)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range",
          "symbol": "VINDC",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": null,
          "max": 100,
          "conditions": "external resistor between supply and VCC pin (note 2)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC clamp voltage",
          "symbol": "VCC",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": 5,
          "max": 5.6,
          "conditions": "Rin=10K",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage lockout threshold (VCC rising)",
          "symbol": "UVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": 2.7,
          "max": 3,
          "conditions": "VCC rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 250,
          "max": 400,
          "conditions": "VCC=5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current during chip undervoltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 50,
          "max": 75,
          "conditions": "VCC=2.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input peak current detection threshold",
          "symbol": "VCSTH",
          "kind": "electrical",
          "unit": "mV",
          "min": 215,
          "typ": 240,
          "max": 265,
          "conditions": "ADJ=5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback threshold (output current)",
          "symbol": "VfbTH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.29,
          "typ": 0.3,
          "max": 0.31,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Overvoltage protection threshold",
          "symbol": "VOVP-TH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input current sense blanking time",
          "symbol": "TBLANK",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 500,
          "max": null,
          "conditions": "VCS=VCSTH+50mV",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum constant off time",
          "symbol": "TOFF",
          "kind": "electrical",
          "unit": "µs",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "Rext=250KΩ",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak current control low threshold",
          "symbol": "VADJ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak current control high threshold",
          "symbol": "VADJ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.4,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Overtemperature protection threshold",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Overtemperature protection hysteresis",
          "symbol": "TSD-HYS",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage lockout hysteresis",
          "symbol": "ΔUVLO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 300,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn3948"
  ],
  "discovery_pitch": "SN3948 (ISSI Integrated Silicon Solution) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "files": [
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    "sn3948.step",
    "sn3948.lbr",
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    "viewers/symbol.html",
    "viewers/footprint.html",
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    "sn3948-hero.overlay.json",
    "sn3948-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}