AS4950

{
  "schema_version": 1,
  "type": "component",
  "slug": "as4950",
  "title": "AS4950",
  "brief": "ASSEMSTAR Brushed DC Motor Drivers, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "motor driver ics",
    "as4950",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "AS4950",
    "manufacturer": "ASSEMSTAR",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "Motor Driver ICs",
    "subcategory": "Brushed DC Motor Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941110521024512",
    "parts": {
      "symbol": "as4950.kicad_sym",
      "footprint": "as4950.kicad_mod",
      "model_3d": "as4950-hero.glb",
      "model_3d_plain": "as4950.glb",
      "model_3d_step": "as4950-etched.step",
      "model_3d_step_plain": "as4950.step",
      "lbr": "as4950.lbr"
    },
    "distributor_links": {
      "lcsc": "C2929412"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V reference) for logic and output circuits."
      },
      {
        "number": "2",
        "name": "IN2",
        "type": "input",
        "description": "Logic input 2 for H-bridge control; accepts 0 to 6 V with thresholds at 0.8 V (low) and 2.0 V (high)."
      },
      {
        "number": "3",
        "name": "IN1",
        "type": "input",
        "description": "Logic input 1 for H-bridge control; accepts 0 to 6 V with thresholds at 0.8 V (low) and 2.0 V (high)."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_in",
        "description": "Analog reference voltage input for current limiting; sets target current via 10 V/V gain comparator with LSEN."
      },
      {
        "number": "5",
        "name": "VP",
        "type": "power_in",
        "description": "Power supply input for full bridge output drivers; 8 V to 40 V operating range."
      },
      {
        "number": "6",
        "name": "OUT1",
        "type": "tri_state",
        "description": "Full bridge DMOS output 1 for motor phase control; capable of ±3.5 A peak current (2 A continuous) with high impedance during dead time and coast mode."
      },
      {
        "number": "7",
        "name": "LSEN",
        "type": "input",
        "description": "Current sense resistor connection; monitors voltage across external sense resistor (-0.5 V to 0.5 V) for PWM current limiting."
      },
      {
        "number": "8",
        "name": "OUT2",
        "type": "tri_state",
        "description": "Full bridge DMOS output 2 for motor phase control; capable of ±3.5 A peak current (2 A continuous) with high impedance during dead time and coast mode."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: VREF maximum voltage specification is not explicitly shown in the datasheet specifications table on ",
          "exposed pad 9 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1541,
        "at": "2026-09-22T08:55:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941110521024512",
        "pages": 7,
        "sha256": "930fd933bcba95ee",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "as4950.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "as4950-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "47ac5a81053d397a821b798bce78d710c18c0babe357efb16d022b110f4e5f1b",
        "checked": "2026-11-13",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ASSEMSTAR",
      "Package": "ESOP-8",
      "Category": "Motor Driver ICs",
      "Pins": "9"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "as4950"
  ],
  "discovery_pitch": "AS4950 (ASSEMSTAR) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "as4950.kicad_sym",
    "as4950.kicad_mod",
    "as4950.glb",
    "as4950.step",
    "as4950.lbr",
    "docs/hero.png",
    "docs/as4950-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "as4950-etched.step",
    "as4950-hero.glb",
    "as4950-hero.overlay.json"
  ],
  "visibility": "public",
  "updated_at": "2026-09-24T16:58:51.299Z",
  "description": "ASSEMSTAR Brushed DC Motor Drivers, ESOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}