UCC21550ADWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc21550adwr",
  "title": "UCC21550ADWR",
  "brief": "Texas Instruments Isolators - Gate Drivers, SOIC-16. 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",
    "power management (pmic)",
    "ucc21550adwr",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "UCC21550ADWR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "Isolators - Gate Drivers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc21550.pdf?ts=1704488082590&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526searchTerm%253DUCC21550ADWR%2526nr%253D3",
    "parts": {
      "symbol": "ucc21550adwr.kicad_sym",
      "footprint": "ucc21550adwr.kicad_mod",
      "model_3d": "ucc21550adwr-hero.glb",
      "model_3d_plain": "ucc21550adwr-etched.glb",
      "model_3d_step": "ucc21550adwr-etched.step",
      "model_3d_step_plain": "ucc21550adwr.step",
      "lbr": "ucc21550adwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C22427509",
      "digikey": "296-UCC21550ADWRTR-ND",
      "mouser": "595-UCC21550ADWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T18:58:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-UCC21550ADWRTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-UCC21550ADWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "INA",
        "type": "input",
        "description": "Input signal for A channel with TTL/CMOS compatible threshold, pulled low internally if left open; an RC filter of R = 10 Ω to 100 Ω and C = 10 pF to 100 pF is recommended."
      },
      {
        "number": "2",
        "name": "INB",
        "type": "input",
        "description": "Input signal for B channel with TTL/CMOS compatible threshold, pulled low internally if left open; an RC filter of R = 10 Ω to 100 Ω and C = 10 pF to 100 pF is recommended."
      },
      {
        "number": "3",
        "name": "VCCI",
        "type": "power_in",
        "description": "Primary-side supply voltage, to be locally decoupled to GND with a low ESR/ESL capacitor placed as close to the device as possible."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Primary-side ground reference to which all primary-side signals are referenced."
      },
      {
        "number": "5",
        "name": "DIS",
        "type": "input",
        "description": "Disables both driver outputs when high and enables both when low; tie to ground if unused, internally pulled high if floating, with a recommended RC filter of R = 0 Ω to 100 Ω and C = 100 pF to 1000 pF."
      },
      {
        "number": "6",
        "name": "DT",
        "type": "input",
        "description": "Dead time programming: float or short to VCCI disables the interlock, a 1.7-kΩ to 100-kΩ resistor to GND sets the minimum dead time, and 0 Ω to 150 Ω or a short to GND interlocks the outputs; do not bypass with a ceramic capacitor >1nF."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "8",
        "name": "VCCI",
        "type": "power_in",
        "description": "Primary-side supply voltage, internally shorted to pin 3."
      },
      {
        "number": "9",
        "name": "VSSB",
        "type": "power_in",
        "description": "Ground reference for secondary side B channel."
      },
      {
        "number": "10",
        "name": "OUTB",
        "type": "output",
        "description": "Output of driver B, connected to the gate of the B channel transistor through a gate resistor."
      },
      {
        "number": "11",
        "name": "VDDB",
        "type": "power_in",
        "description": "Secondary-side power for driver B, to be locally decoupled to VSSB with a low ESR/ESL capacitor placed as close to the device as possible."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "14",
        "name": "VSSA",
        "type": "power_in",
        "description": "Ground reference for secondary side A channel."
      },
      {
        "number": "15",
        "name": "OUTA",
        "type": "output",
        "description": "Output of driver A, connected to the gate of the A channel transistor through a gate resistor."
      },
      {
        "number": "16",
        "name": "VDDA",
        "type": "power_in",
        "description": "Secondary-side power for driver A, to be locally decoupled to VSSA with a low ESR/ESL capacitor placed as close to the device as possible."
      }
    ],
    "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": [],
        "pages_sent": 17,
        "cost_usd": 0.1541,
        "at": "2026-10-26T18:58:06"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc21550.pdf?ts=1704488082590&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526searchTerm%253DUCC21550ADWR%2526nr%253D3",
        "pages": 54,
        "sha256": "5f80a86ae72418d7",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          10.3,
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "159663ceb2b4996b1b89d3111e4a355fc27de3e24d3570f50e5ed9086e0d73af",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "Power Management (PMIC)",
      "Pins": "16"
    },
    "appearance": {
      "contacts": {
        "quote": "• Increasing the PCB copper connecting to VDDA, VDDB, VSSA and VSSB pins is recommended, with priority",
        "page": 39,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "5f80a86ae72418d7d538067f3f0438907b9692b74554a8d7aa6866c2f6ffc7ba"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5f80a86ae72418d7d538067f3f0438907b9692b74554a8d7aa6866c2f6ffc7ba",
      "rows": [
        {
          "name": "Input bias supply voltage",
          "symbol": "VCCI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "VCCI to GND",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output bias supply voltage",
          "symbol": "VDDA, VDDB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 30,
          "conditions": "VDDA, VDDB to VSS",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input signal DC voltage INA, INB, DT, DIS",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "to GND; max printed as VCCI + 0.3, must not exceed 6 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2000,
          "typ": null,
          "max": 2000,
          "conditions": "Human body model, all pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD CDM",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1000,
          "typ": null,
          "max": 1000,
          "conditions": "Charged device model, all pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input bias pin supply voltage",
          "symbol": "VCCI",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output bias supply voltage",
          "symbol": "VDDA, VDDB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 6.5,
          "typ": null,
          "max": 25,
          "conditions": "UCC21550A - 5V UVLO, VDDA-VSSA, VDDB-VSSB",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 69.8,
          "max": null,
          "conditions": "DW 16 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case (top) thermal resistance",
          "symbol": "RθJC(top)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 33.1,
          "max": null,
          "conditions": "DW 16 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 36.9,
          "max": null,
          "conditions": "DW 16 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-top characterization parameter",
          "symbol": "ΨJT",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 22.2,
          "max": null,
          "conditions": "DW 16 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board characterization parameter",
          "symbol": "ΨJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 36,
          "max": null,
          "conditions": "DW 16 pins",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum power dissipation (both sides)",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 950,
          "conditions": "VCCI = 5V, VDDA/VDDB = 20V, INA/B = 3.3V, 460kHz 50% duty cycle square wave, CL=2.2nF, TJ=150℃, TA=25℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum power dissipation by transmitter side",
          "symbol": "PDI",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum power dissipation by each driver side",
          "symbol": "PDA, PDB",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 450,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VCC quiescent current",
          "symbol": "IVCC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 2,
          "conditions": "VINx = 0 V, DIS = GND; VCC=3.3V (same for VCC=5V)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC quiescent current",
          "symbol": "IVCC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.2,
          "max": 4.8,
          "conditions": "VINx = VCC, DIS = GND; VCC=3.3V (same for VCC=5V)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC quiescent current",
          "symbol": "IVCC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.7,
          "max": 3.2,
          "conditions": "VINx PWM at 0V to VCC at fSW = 500kHz, DIS = GND; VCC=3.3V (same for VCC=5V)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx quiescent current",
          "symbol": "IVDDx",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.2,
          "max": 2,
          "conditions": "VINx = 0 V, DIS = GND",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx quiescent current",
          "symbol": "IVDDx",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 2.3,
          "conditions": "VINx = 0 V, DIS = GND; VDD=25V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx quiescent current",
          "symbol": "IVDDx",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 2.2,
          "conditions": "VINx = VCC, DIS = GND",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx quiescent current",
          "symbol": "IVDDx",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.5,
          "max": 2.5,
          "conditions": "VINx = VCC, DIS = GND; VDD=25V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx quiescent current",
          "symbol": "IVDDx",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.7,
          "max": 4.4,
          "conditions": "VINx PWM at 0V to VCC at fSW = 500kHz, DIS = GND (same for VDD=25V)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO Rising Threshold",
          "symbol": "VVCC_ON",
          "kind": "electrical",
          "unit": "V",
          "min": 2.55,
          "typ": 2.7,
          "max": 2.85,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO Falling Threshold",
          "symbol": "VVCC_OFF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.35,
          "typ": 2.5,
          "max": 2.65,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO Threshold Hysteresis",
          "symbol": "VVCC_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO ON Delay",
          "symbol": "tVCC+ to OUT",
          "kind": "timing",
          "unit": "µs",
          "min": 18,
          "typ": 42,
          "max": 80,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO OFF Delay",
          "symbol": "tVCC– to OUT",
          "kind": "timing",
          "unit": "µs",
          "min": 0.5,
          "typ": 1.2,
          "max": 7,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO Deglitch Filter",
          "symbol": "tVCCFIL",
          "kind": "timing",
          "unit": "µs",
          "min": 0.4,
          "typ": 0.9,
          "max": 3.1,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx UVLO Rising Threshold",
          "symbol": "VVDD_ON",
          "kind": "electrical",
          "unit": "V",
          "min": 5.7,
          "typ": 6,
          "max": 6.3,
          "conditions": "5-V UVLO Option",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx UVLO Falling Threshold",
          "symbol": "VVDD_OFF",
          "kind": "electrical",
          "unit": "V",
          "min": 5.4,
          "typ": 5.7,
          "max": 6,
          "conditions": "5-V UVLO Option",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx UVLO Threshold Hysteresis",
          "symbol": "VVDD_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "5-V UVLO Option",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx UVLO ON Delay",
          "symbol": "tVDD+ to OUT",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "VDDx UVLO OFF Delay",
          "symbol": "tVDD– to OUT",
          "kind": "timing",
          "unit": "µs",
          "min": 0.1,
          "typ": 0.5,
          "max": 2,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input High Threshold Voltage",
          "symbol": "VINx_H, VDIS_H",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2,
          "max": 2.3,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input Low Threshold Voltage",
          "symbol": "VINx_L, VDIS_L",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input Threshold Hysteresis",
          "symbol": "VINx_HYS, VDIS_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "INx Pin Pull Down Resistance",
          "symbol": "RINxD",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 50,
          "typ": 90,
          "max": 185,
          "conditions": "INx = 3.3V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "DIS Pin Pull Up Resistance",
          "symbol": "RDISD",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 50,
          "typ": 90,
          "max": 185,
          "conditions": "DIS= 3.3V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Peak Output Source Current",
          "symbol": "IO+",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": -4,
          "max": null,
          "conditions": "CVDDx = 10 µF, CL = 0.22 µF, f = 1 kHz",
          "source_page": 9,
          "source": "datasheet"
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          "name": "Dead time, RDT≤0.15kΩ",
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          "name": "Dead time RDT = 10 kΩ",
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          "name": "Dead time RDT = 50 kΩ",
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          "min": 399,
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          "min": 0,
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          "min": 0,
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          "min": 125,
          "typ": null,
          "max": null,
          "conditions": "VCM = 1500V",
          "source_page": 10,
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