LM3445MMX

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm3445mmx",
  "title": "LM3445MMX",
  "brief": "Texas Instruments LED Drivers, VSSOP-10-0.5mm. 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",
    "led drivers",
    "lm3445mmx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM3445MMX",
    "manufacturer": "Texas Instruments",
    "package": "VSSOP-10-0.5mm",
    "pin_count": 10,
    "category": "LED Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm3445",
    "parts": {
      "symbol": "lm3445mmx.kicad_sym",
      "footprint": "lm3445mmx.kicad_mod",
      "model_3d": "lm3445mmx-hero.glb",
      "model_3d_plain": "lm3445mmx.glb",
      "model_3d_step": "lm3445mmx-etched.step",
      "model_3d_step_plain": "lm3445mmx.step",
      "lbr": "lm3445mmx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2679032",
      "digikey": "2156-LM3445MMX-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T02:11:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM3445MMX-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ASNS",
        "type": "output",
        "description": "PWM output of TRIAC dim decoder circuit with 0-4 V range; duty cycle proportional to dimmer on-time."
      },
      {
        "number": "2",
        "name": "FLTR1",
        "type": "input",
        "description": "First filter input; 120-Hz PWM signal compared to 1-3 V, 5.85-kHz ramp to generate proportional frequency PWM."
      },
      {
        "number": "3",
        "name": "DIM",
        "type": "bidirectional",
        "description": "Input/output dual function dim pin; can be driven with external PWM or used as output to other drivers; pull above 4.9 V to tri-state."
      },
      {
        "number": "4",
        "name": "COFF",
        "type": "input",
        "description": "OFF time setting pin; user-set RC network connected to this pin sets constant OFF time of switching controller."
      },
      {
        "number": "5",
        "name": "FLTR2",
        "type": "input",
        "description": "Second filter input; capacitor filters PWM dimming signal to provide DC voltage for LED current control or analog dimming."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Circuit ground connection and power return path."
      },
      {
        "number": "7",
        "name": "ISNS",
        "type": "input",
        "description": "LED current sense input; external resistor from MOSFET source to GND through this pin sets maximum LED current."
      },
      {
        "number": "8",
        "name": "GATE",
        "type": "output",
        "description": "Power MOSFET driver output; provides gate drive for power switching MOSFET of buck controller."
      },
      {
        "number": "9",
        "name": "VCC",
        "type": "power_in",
        "description": "Input voltage pin; supplies 8-12 V to internal control circuitry and gate driver."
      },
      {
        "number": "10",
        "name": "BLDR",
        "type": "input",
        "description": "Bleeder pin with internal switched 230-Ω resistor; provides input path and current for proper TRIAC dimmer firing."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 7,
        "cost_usd": 0.109,
        "at": "2026-10-07T02:11:38"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm3445",
        "pages": 46,
        "sha256": "e690e402245bfa5e",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 10,
        "described": 10,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm3445mmx.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b8f88eac3ce221c2ccb0b5048f9ad49c2ef4af148f8ae50c4e232e357683f547",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm3445mmx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "16d0f149128b4b02c016d0d04360fcb7c49546926fe383460607d703ca44c79c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VSSOP-10-0.5mm",
      "Category": "LED Drivers",
      "Pins": "10"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm3445mmx"
  ],
  "discovery_pitch": "LM3445MMX (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "lm3445mmx.step",
    "lm3445mmx.lbr",
    "docs/hero.png",
    "docs/lm3445mmx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm3445mmx-hero.glb",
    "lm3445mmx-hero.overlay.json"
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  "visibility": {
    "public": true
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}