IS31FL3199-QFLS2-TR

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  "type": "component",
  "slug": "is31fl3199-qfls2-tr",
  "title": "IS31FL3199-QFLS2-TR",
  "brief": "ISSI Integrated Silicon Solution LED Drivers, UQFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "led drivers",
    "is31fl3199-qfls2-tr",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "IS31FL3199-QFLS2-TR",
    "manufacturer": "ISSI Integrated Silicon Solution",
    "package": "UQFN-20-EP(3x3)",
    "pin_count": 21,
    "category": "LED Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881680128495616",
    "parts": {
      "symbol": "is31fl3199-qfls2-tr.kicad_sym",
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      "lbr": "is31fl3199-qfls2-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C150408",
      "digikey": "2521-IS31FL3199-QFLS2-TR-ND",
      "mouser": "870-31FL3199QFLS2TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T05:51:51Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2521-IS31FL3199-QFLS2-TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "870-31FL3199QFLS2TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, 2.7V to 5.5V."
      },
      {
        "number": "2",
        "name": "C_FILT",
        "type": "passive",
        "description": "Filter capacitor for audio control."
      },
      {
        "number": "3",
        "name": "OUT1",
        "type": "output",
        "description": "Current source output for channel 1, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "4",
        "name": "OUT2",
        "type": "output",
        "description": "Current source output for channel 2, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "5",
        "name": "OUT3",
        "type": "output",
        "description": "Current source output for channel 3, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "6",
        "name": "OUT4",
        "type": "output",
        "description": "Current source output for channel 4, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "8",
        "name": "OUT5",
        "type": "output",
        "description": "Current source output for channel 5, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "9",
        "name": "OUT6",
        "type": "output",
        "description": "Current source output for channel 6, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "10",
        "name": "OUT7",
        "type": "output",
        "description": "Current source output for channel 7, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "11",
        "name": "OUT8",
        "type": "output",
        "description": "Current source output for channel 8, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "12",
        "name": "OUT9",
        "type": "output",
        "description": "Current source output for channel 9, with output current set by the CS bits up to 40mA."
      },
      {
        "number": "13",
        "name": "SDB",
        "type": "input",
        "description": "Shuts down the chip when pulled low (hardware shutdown, about 1µA typical)."
      },
      {
        "number": "14",
        "name": "I_AUD",
        "type": "bidirectional",
        "description": "Audio current input or output used for chip cascade synchronization of the audio current."
      },
      {
        "number": "15",
        "name": "R_EXT",
        "type": "passive",
        "description": "Input terminal for an external resistor, which must be about 100kΩ."
      },
      {
        "number": "16",
        "name": "AD",
        "type": "input",
        "description": "I2C address setting: connect to GND (00), VCC (11), SCL (01) or SDA (10)."
      },
      {
        "number": "17",
        "name": "IN",
        "type": "input",
        "description": "Audio input."
      },
      {
        "number": "18",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock."
      },
      {
        "number": "19",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data, bidirectional open-collector with an external pull-up resistor (typically 4.7kΩ)."
      },
      {
        "number": "20",
        "name": "CLK/V_BM",
        "type": "bidirectional",
        "description": "CLK input or output for cascade synchronization of breathing; when the breathing mark function is enabled this pin is the V_BM output."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
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        "primary_model": "claude-haiku-5-5",
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        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Package naming mismatch: the hint says UQFN-20-EP(3x3), but the datasheet names the package QFN-20 (; Thermal pad (exposed pad) is specified only as 'Connect to GND' and is not given a pin number in the; The pin configuration drawing text is partly garbled in the extracted text and does not give a full ",
          "exposed pad 21 added from the footprint",
          "3/21 pins cited to the wrong page (name found elsewhere): ['4:OUT2@p3', '5:OUT3@p3', '11:OUT8@p3']"
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        "at": "2026-10-19T05:49:31"
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      "Manufacturer": "ISSI Integrated Silicon Solution",
      "Package": "UQFN-20-EP(3x3)",
      "Category": "LED Drivers",
      "Pins": "21"
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          "unit": "mA",
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          "conditions": "PWM Control Mode, VDS = 0.4V, PWM Register(07h~0Fh) = 0xFF (Note 1)",
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          "name": "Current sink headroom voltage",
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          "name": "Bus free time between a STOP and a START condition",
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          "name": "External resistor at R_EXT",
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