BD81A44EFV-ME2

{
  "schema_version": 1,
  "type": "component",
  "slug": "bd81a44efv-me2",
  "title": "BD81A44EFV-ME2",
  "brief": "ROHM Semicon LED Drivers, HTSSOP-28-EP. 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",
    "display modules - led drivers - display drivers",
    "bd81a44efv-me2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BD81A44EFV-ME2",
    "manufacturer": "ROHM Semicon",
    "package": "HTSSOP-28-EP",
    "pin_count": 29,
    "category": "Display Modules / LED Drivers / Display Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c4079242f1bef224fca2d092f55c8703.pdf",
    "parts": {
      "symbol": "bd81a44efv-me2.kicad_sym",
      "footprint": "bd81a44efv-me2.kicad_mod",
      "model_3d": "bd81a44efv-me2-hero.glb",
      "model_3d_plain": "bd81a44efv-me2-etched.glb",
      "model_3d_step": "bd81a44efv-me2-etched.step",
      "model_3d_step_plain": "bd81a44efv-me2.step",
      "lbr": "bd81a44efv-me2.lbr"
    },
    "distributor_links": {
      "lcsc": "C2678913",
      "digikey": "BD81A44EFV-ME2TR-ND",
      "mouser": "755-BD81A44EFV-ME2"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:37:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BD81A44EFV-ME2TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "755-BD81A44EFV-ME2",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Input power supply pin."
      },
      {
        "number": "2",
        "name": "SS",
        "type": "passive",
        "description": "Soft start capacitor connection."
      },
      {
        "number": "3",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output."
      },
      {
        "number": "4",
        "name": "RT",
        "type": "passive",
        "description": "Oscillation frequency setting resistor connection."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "External synchronization input pin."
      },
      {
        "number": "6",
        "name": "SHDETEN",
        "type": "input",
        "description": "Short detection enable signal input."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Small signal GND pin."
      },
      {
        "number": "8",
        "name": "PWM",
        "type": "input",
        "description": "PWM light modulation signal input pin."
      },
      {
        "number": "9",
        "name": "FAIL1",
        "type": "output",
        "description": "Failure signal output pin 1."
      },
      {
        "number": "10",
        "name": "FAIL2",
        "type": "output",
        "description": "Failure signal output pin 2."
      },
      {
        "number": "11",
        "name": "LEDEN1",
        "type": "input",
        "description": "Enable pin 1 for LED output."
      },
      {
        "number": "12",
        "name": "LEDEN2",
        "type": "input",
        "description": "Enable pin 2 for LED output."
      },
      {
        "number": "13",
        "name": "LED1",
        "type": "output",
        "description": "LED output pin 1."
      },
      {
        "number": "14",
        "name": "LED2",
        "type": "output",
        "description": "LED output pin 2."
      },
      {
        "number": "15",
        "name": "LED3",
        "type": "output",
        "description": "LED output pin 3."
      },
      {
        "number": "16",
        "name": "LED4",
        "type": "output",
        "description": "LED output pin 4."
      },
      {
        "number": "17",
        "name": "OVP",
        "type": "input",
        "description": "Over voltage detection pin."
      },
      {
        "number": "18",
        "name": "ISET",
        "type": "passive",
        "description": "LED output current setting pin."
      },
      {
        "number": "19",
        "name": "PGND",
        "type": "power_in",
        "description": "LED output GND pin."
      },
      {
        "number": "20",
        "name": "OUTL",
        "type": "output",
        "description": "Low side FET gate pin."
      },
      {
        "number": "21",
        "name": "DGND",
        "type": "power_in",
        "description": "DC/DC converter output GND pin."
      },
      {
        "number": "22",
        "name": "VDISC",
        "type": "passive",
        "description": "Output voltage discharge pin."
      },
      {
        "number": "23",
        "name": "SW",
        "type": "passive",
        "description": "High side FET source pin."
      },
      {
        "number": "24",
        "name": "OUTH",
        "type": "output",
        "description": "High side FET gate pin."
      },
      {
        "number": "25",
        "name": "BOOT",
        "type": "power_in",
        "description": "High side FET driver power supply pin."
      },
      {
        "number": "26",
        "name": "VREG",
        "type": "power_out",
        "description": "Internal constant voltage output."
      },
      {
        "number": "27",
        "name": "EN",
        "type": "input",
        "description": "Enable pin."
      },
      {
        "number": "28",
        "name": "CS",
        "type": "input",
        "description": "DC/DC converter current sense pin."
      },
      {
        "number": "29",
        "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-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin electrical types (e.g. LED1-4, COMP, VDISC, SW, BOOT, SS, RT, ISET) are inferred from the functi; The exposed pad has no pin number in the datasheet ('-'). 'EP' is used as its identifier."
        ],
        "pages_sent": 7,
        "cost_usd": 0.078,
        "at": "2026-10-27T01:36:49"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c4079242f1bef224fca2d092f55c8703.pdf",
        "pages": 47,
        "sha256": "af0ccb61ebed8547",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.2,
          9.7,
          1.05
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ff242f1d3be9d09e7f929707a2c5b1ee974a4f882053b04bcdb1cd2cb21223ef",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "extents_mm": [
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        "sha256": "42a34e5b0d1bdab7c8156212ce5c268db2db030b626cdbed4f41576f510128bd",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "HTSSOP-28-EP",
      "Category": "Display Modules / LED Drivers / Display Drivers",
      "Pins": "29"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "af0ccb61ebed8547895ebcebea2dce8ffc7e2ab3b74b83d88fbc6e178dc15e15",
      "rows": [
        {
          "name": "Power Supply Voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": 12,
          "max": 35,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": 25,
          "max": 125,
          "conditions": "",
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        },
        {
          "name": "DC/DC Oscillation Frequency",
          "symbol": "fOSC",
          "kind": "recommended_operating",
          "unit": "kHz",
          "min": 200,
          "typ": 300,
          "max": 2200,
          "conditions": "",
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        },
        {
          "name": "External Synchronized Pulse Duty",
          "symbol": "DSYNC",
          "kind": "recommended_operating",
          "unit": "%",
          "min": 40,
          "typ": 50,
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          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "VREG Capacity",
          "symbol": "CVREG",
          "kind": "recommended_operating",
          "unit": "μF",
          "min": 1,
          "typ": 2.2,
          "max": 4.7,
          "conditions": "",
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        {
          "name": "LED Current Setting Resistance",
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        {
          "name": "Oscillation Frequency Setting Resistance",
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          "min": 3.6,
          "typ": 27,
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          "conditions": "",
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        },
        {
          "name": "Soft Start Capacity Setting",
          "symbol": "CSS",
          "kind": "recommended_operating",
          "unit": "μF",
          "min": 0.047,
          "typ": 0.1,
          "max": 0.47,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Circuit Current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "EN = High, SYNC = High, RT = OPEN, PWM = Low, ISET = OPEN, CIN = 10 μF",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Standby Current",
          "symbol": "IST",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "EN = Low, VDISC = OPEN",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Reference Voltage",
          "symbol": "VVREG",
          "kind": "electrical",
          "unit": "V",
          "min": 4.5,
          "typ": 5,
          "max": 5.5,
          "conditions": "IVREG = -5 mA, CVREG = 2.2 μF",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OUTH High Side ON-Resistor",
          "symbol": "RONHH",
          "kind": "electrical",
          "unit": "Ω",
          "min": 1.5,
          "typ": 3.5,
          "max": 7,
          "conditions": "IOUTH = -10 mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OUTH Low Side ON-Resistor",
          "symbol": "RONHL",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.8,
          "typ": 2.5,
          "max": 5.5,
          "conditions": "IOUTH = 10 mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OCP Detection Voltage",
          "symbol": "VOLIMIT",
          "kind": "electrical",
          "unit": "V",
          "min": -0.22,
          "typ": -0.2,
          "max": -0.18,
          "conditions": "Printed as VCC-0.22 / VCC-0.20 / VCC-0.18 V (relative to VCC)",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OUTL High Side ON-Resistor",
          "symbol": "RONLH",
          "kind": "electrical",
          "unit": "Ω",
          "min": 1.5,
          "typ": 3.5,
          "max": 10,
          "conditions": "IOUTL = -10 mA",
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          "source": "datasheet"
        },
        {
          "name": "OUTL Low Side ON-Resistor",
          "symbol": "RONLL",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.8,
          "typ": 2.5,
          "max": 5.5,
          "conditions": "IOUTL = 10 mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "SW ON-Resistor",
          "symbol": "RON_SW",
          "kind": "electrical",
          "unit": "Ω",
          "min": 4,
          "typ": 10,
          "max": 25,
          "conditions": "ISW = 10 mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LED Control Voltage",
          "symbol": "VLED",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "COMP Sink Current",
          "symbol": "ICOMPSINK",
          "kind": "electrical",
          "unit": "μA",
          "min": 35,
          "typ": 80,
          "max": 145,
          "conditions": "VLEDn = 2 V (n = 1 to 4), VCOMP = 1 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "COMP Source Current",
          "symbol": "ICOMPSOUCE",
          "kind": "electrical",
          "unit": "μA",
          "min": -145,
          "typ": -80,
          "max": -35,
          "conditions": "VLEDn = 0.5 V (n = 1 to 4), VCOMP = 1 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Oscillation Frequency 1",
          "symbol": "fOSC1",
          "kind": "electrical",
          "unit": "kHz",
          "min": 285,
          "typ": 300,
          "max": 315,
          "conditions": "RRT = 27 kΩ",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Oscillation Frequency 2",
          "symbol": "fOSC2",
          "kind": "electrical",
          "unit": "kHz",
          "min": 1800,
          "typ": 2000,
          "max": 2200,
          "conditions": "RRT = 3.9 kΩ",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OVP Detection Voltage",
          "symbol": "VOVP1",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": 2,
          "max": 2.1,
          "conditions": "VOVP: Sweep up",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "OVP Hysteresis Width",
          "symbol": "VOVPHYS1",
          "kind": "electrical",
          "unit": "V",
          "min": 0.02,
          "typ": 0.06,
          "max": 0.1,
          "conditions": "VOVP: Sweep down",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "UVLO Detection Voltage",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 3.2,
          "typ": 3.5,
          "max": 3.8,
          "conditions": "VCC: Sweep down",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "UVLO Hysteresis Width",
          "symbol": "VUHYS",
          "kind": "electrical",
          "unit": "V",
          "min": 0.25,
          "typ": 0.5,
          "max": 0.75,
          "conditions": "VCC: Sweep up, VVREG > 3.5 V",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "LED Current Relative Dispersion",
          "symbol": "ΔILED1",
          "kind": "electrical",
          "unit": "%",
          "min": -3,
          "typ": null,
          "max": 3,
          "conditions": "ILED = 50 mA, Ta = 25 °C",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "LED Current Relative Dispersion",
          "symbol": "ΔILED1",
          "kind": "electrical",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "ILED = 50 mA, Ta = -40 °C to +125 °C",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "LED Current Absolute Dispersion",
          "symbol": "ΔILED2",
          "kind": "electrical",
          "unit": "%",
          "min": -3,
          "typ": null,
          "max": 3,
          "conditions": "ILED = 50 mA, Ta = 25 °C",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "LED Current Absolute Dispersion",
          "symbol": "ΔILED2",
          "kind": "electrical",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "ILED = 50 mA, Ta = -40 °C to +125 °C",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "ISET Voltage",
          "symbol": "VISET",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "RISET = 100 kΩ",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "PWM Minimum Pulse Width",
          "symbol": "tMIN",
          "kind": "timing",
          "unit": "μs",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "fPWM = 100 Hz to 20 kHz, ILED = 20 mA to 100 mA",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "PWM Frequency",
          "symbol": "fPWM",
          "kind": "timing",
          "unit": "kHz",
          "min": 0.1,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 16,
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        {
          "name": "LED Open Detection Voltage",
          "symbol": "VOPEN",
          "kind": "electrical",
          "unit": "V",
          "min": 0.2,
          "typ": 0.3,
          "max": 0.4,
          "conditions": "VLEDn (n = 1 to 4) Sweep down",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "LED Short Detection Voltage",
          "symbol": "VSHORT",
          "kind": "electrical",
          "unit": "V",
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          "typ": 4.5,
          "max": 4.8,
          "conditions": "VLEDn (n = 1 to 4) Sweep up",
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        {
          "name": "LED Short Detection Latch OFF Delay Time",
          "symbol": "tSHORT",
          "kind": "timing",
          "unit": "ms",
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          "typ": 100,
          "max": 130,
          "conditions": "RRT = 27 kΩ",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "SCP Latch OFF Delay Time",
          "symbol": "tSCP",
          "kind": "timing",
          "unit": "ms",
          "min": 70,
          "typ": 100,
          "max": 130,
          "conditions": "RRT = 27 kΩ",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "PWM Latch OFF Delay Time",
          "symbol": "tPWM",
          "kind": "timing",
          "unit": "ms",
          "min": 70,
          "typ": 100,
          "max": 130,
          "conditions": "RRT = 27 kΩ",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "ISET-GND Short Protection Impedance",
          "symbol": "ISETPROT",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": null,
          "max": 4.7,
          "conditions": "",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Input High Voltage",
          "symbol": "VINH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.1,
          "typ": null,
          "max": null,
          "conditions": "EN, SYNC, PWM, SHDETEN, LEDEN1, LEDEN2; max printed as VVREG",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage",
          "symbol": "VINL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "EN, SYNC, PWM, SHDETEN, LEDEN1, LEDEN2; min printed as GND",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Input Current",
          "symbol": "IIN",
          "kind": "electrical",
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