LM3492HCMHX

{
  "slug": "lm3492hcmhx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments LED Drivers, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "nixie tube driver-led driver",
    "lm3492hcmhx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "lm3492hcmhx.kicad_mod",
    "lm3492hcmhx.glb",
    "lm3492hcmhx.step",
    "lm3492hcmhx.lbr",
    "docs/hero.png",
    "docs/lm3492hcmhx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm3492hcmhx-hero.glb",
    "lm3492hcmhx-hero.overlay.json"
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  "component": {
    "mpn": "LM3492HCMHX",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Nixie Tube Driver/LED Driver",
    "subcategory": "LED Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm3492hc",
    "parts": {
      "symbol": "lm3492hcmhx.kicad_sym",
      "footprint": "lm3492hcmhx.kicad_mod",
      "model_3d": "lm3492hcmhx-hero.glb",
      "model_3d_plain": "lm3492hcmhx.glb",
      "model_3d_step": "lm3492hcmhx-etched.step",
      "model_3d_step_plain": "lm3492hcmhx.step",
      "lbr": "lm3492hcmhx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2679252"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T09:23:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EN",
        "type": "input",
        "description": "Enable input with an internal pullup; connect to a voltage higher than 1.63 V to provide precision enable for the device."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage pin; the input voltage range is 4.5 V to 65 V."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Switch node, internally connected to the drain of the integrated MOSFET."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "output",
        "description": "Switch node, internally connected to the drain of the integrated MOSFET."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "input",
        "description": "Output voltage sense pin that senses the output voltage for nearly constant switching frequency control."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "input",
        "description": "Frequency control pin; an external resistor from the VOUT pin to this pin sets the switching frequency."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Output voltage feedback input connected through a feedback resistor divider; the voltage on this pin is from 1.05 V to 2.5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Analog signal ground; connect directly to the exposed pad beneath the device."
      },
      {
        "number": "9",
        "name": "IOUT2",
        "type": "input",
        "description": "Current regulator input for channel 2; the regulated current is programmable via the IREF pin."
      },
      {
        "number": "10",
        "name": "IOUT1",
        "type": "input",
        "description": "Current regulator input for channel 1; the regulated current is programmable via the IREF pin."
      },
      {
        "number": "11",
        "name": "CDHC",
        "type": "input",
        "description": "Dynamic headroom control pin; an external capacitor sets the DHC sensitivity and a 12 µA internal current source charges it at start-up for soft start."
      },
      {
        "number": "12",
        "name": "IREF",
        "type": "input",
        "description": "Current setting pin; an external resistor from this pin to ground programs the regulated current of channels 1 and 2."
      },
      {
        "number": "13",
        "name": "COMM",
        "type": "bidirectional",
        "description": "Open-drain bidirectional logic pin for power-good, overtemperature, IOUT overvoltage and undervoltage indications, and command sending (switching frequency tuning and channel 1 disabling)."
      },
      {
        "number": "14",
        "name": "LGND",
        "type": "power_in",
        "description": "Current regulator ground; must be connected to the GND pin and exposed pad for normal operation, and is not internally connected to GND."
      },
      {
        "number": "15",
        "name": "DIM1/CLK",
        "type": "bidirectional",
        "description": "Dimming control of channel 1 that turns the channel 1 current regulator on and off; internally pulled low by 5 µA, and also serves as the clock for latching COMM input and output data."
      },
      {
        "number": "16",
        "name": "DIM2",
        "type": "input",
        "description": "Dimming control of channel 2 that turns the channel 2 current regulator on and off; internally pulled low by 5 µA."
      },
      {
        "number": "17",
        "name": "PGND",
        "type": "power_in",
        "description": "Integrated MOSFET ground; must be connected to the GND pin and exposed pad for normal operation, and is not internally connected to GND."
      },
      {
        "number": "18",
        "name": "PGND",
        "type": "power_in",
        "description": "Integrated MOSFET ground; must be connected to the GND pin and exposed pad for normal operation, and is not internally connected to GND."
      },
      {
        "number": "19",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal LED regulator output, nominally regulated to 5.5 V; connect a capacitor of 0.47 µF or larger between the VCC and GND pins."
      },
      {
        "number": "20",
        "name": "ILIM",
        "type": "input",
        "description": "Peak current limit adjust; an external resistor from ILIM to VCC reduces the peak current limit, and connecting ILIM to ground gives the maximum current limit."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 labels the thermal pad 'Exposed Pad' with no printed number, so it is omitted from the; The datasheet's pin table lists VIN as type 'I'. It is mapped to power_in because it is the supply i; The datasheet's pin table lists SW as type 'I'. It is mapped to output because it is the switch node",
          "exposed pad 21 added from the footprint"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0751,
        "at": "2026-10-11T09:23:00"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm3492hc",
        "pages": 32,
        "sha256": "45f254841b8a2c5b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b1ddda4740350ac26c1ee0c8713472f9a0486d47c0185095bb0203669b77ee3d",
        "checked": "2026-10-11",
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        "sha256": "574e69559001f9e02a92a5dad17969ac916cd95e2e5c1346e514dc6984c669bd",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}