LT3795HFE#PBF

{
  "slug": "lt3795hfe-pbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices LED Drivers, TSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "led drivers",
    "lt3795hfe#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "lt3795hfe-pbf.step",
    "lt3795hfe-pbf.lbr",
    "docs/hero.png",
    "docs/lt3795hfe-pbf-datasheet.pdf",
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    "viewers/footprint.html",
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    "lt3795hfe-pbf-hero.overlay.json",
    "lt3795hfe-pbf-etched.glb"
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  "component": {
    "mpn": "LT3795HFE#PBF",
    "manufacturer": "Analog Devices",
    "package": "TSSOP-28-EP",
    "pin_count": 29,
    "category": "LED Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590006638330339328",
    "parts": {
      "symbol": "lt3795hfe-pbf.kicad_sym",
      "footprint": "lt3795hfe-pbf.kicad_mod",
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      "model_3d_step": "lt3795hfe-pbf-etched.step",
      "model_3d_step_plain": "lt3795hfe-pbf.step",
      "lbr": "lt3795hfe-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C580145"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T18:32:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ISP",
        "type": "passive",
        "description": "Connection point for the positive terminal of the current feedback resistor (RLED), which also serves as the positive rail for the TG pin driver."
      },
      {
        "number": "2",
        "name": "ISN",
        "type": "passive",
        "description": "Connection point for the negative terminal of the current feedback resistor (RLED)."
      },
      {
        "number": "3",
        "name": "TG",
        "type": "output",
        "description": "Top gate driver output that inverts and level-shifts the PWM signal to drive a series PMOS between VISP and (VISP - 7V) when VISP > 7V, with an internal 7V clamp limiting VGS; leave unconnected if not used."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground that also serves as the control-loop current sense input, sensing the negative terminal of the N-channel source sense resistor."
      },
      {
        "number": "5",
        "name": "ISMON",
        "type": "output",
        "description": "ISP/ISN current report pin with VISMON = ILED • RLED • 4, driven to ground when PWM is low; leave unconnected if not used and bypass with 47nF or higher if needed."
      },
      {
        "number": "6",
        "name": "CTRL2",
        "type": "input",
        "description": "Current sense threshold adjustment pin 2, identical in function to CTRL1; it must not be left open, and connecting it to GND gives zero LED current."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Voltage loop feedback pin regulated to 1.25V nominal for constant-voltage and LED protection; it must not be tied to GND, and driving it above 1.3V pulls GATE low and drives TG high."
      },
      {
        "number": "8",
        "name": "VC",
        "type": "passive",
        "description": "Transconductance error amplifier output used to stabilize the loop with an RC network; it is high impedance when PWM is low and must not be left open."
      },
      {
        "number": "9",
        "name": "CTRL1",
        "type": "input",
        "description": "Current sense threshold adjustment pin 1, identical in function to CTRL2; connect to VREF for the 250mV default threshold and do not leave open."
      },
      {
        "number": "10",
        "name": "VREF",
        "type": "power_in",
        "description": "Voltage reference output, typically 2.015V, that can supply up to 100µA to drive CTRL pin resistor dividers."
      },
      {
        "number": "11",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start and fault timer pin with a 28µA typical pull-up to an internal 2.5V rail; it must be discharged below 0.2V to restart and must not be left open."
      },
      {
        "number": "12",
        "name": "RT",
        "type": "passive",
        "description": "Switching frequency adjustment pin set by a resistor to GND (see the Typical Performance curve or Table 2); must not be left open."
      },
      {
        "number": "13",
        "name": "RAMP",
        "type": "input",
        "description": "Spread spectrum modulation pin where the modulation frequency is set by 12µA/(2 • 1V • CRAMP); tie to GND if not used."
      },
      {
        "number": "14",
        "name": "PWM",
        "type": "input",
        "description": "PWM input where a low signal turns off switching and drives TG to the ISP level; it has an internal 500k pull-down and should connect to VREF if not used."
      },
      {
        "number": "15",
        "name": "SHORTLED",
        "type": "output",
        "description": "Open-collector pull-down that asserts on FB < 0.3V after SS reaches 1.7V at start-up or on LED overcurrent (V(ISP-ISN) > 375mV), and requires an external pull-up."
      },
      {
        "number": "16",
        "name": "OPENLED",
        "type": "output",
        "description": "Open-collector pull-down that asserts when FB is above 1.20V (typical) and V(ISP-ISN) is below 25mV (typical), and requires an external pull-up."
      },
      {
        "number": "17",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, same function as pin 4."
      },
      {
        "number": "18",
        "name": "SENSE",
        "type": "input",
        "description": "Current sense input for the control loop, to be Kelvin-connected to the positive terminal of the N-channel source sense resistor RSENSE."
      },
      {
        "number": "19",
        "name": "GATE",
        "type": "output",
        "description": "N-channel MOSFET gate driver output that switches between INTVCC and GND and is driven to GND during shutdown, fault or idle states."
      },
      {
        "number": "20",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Regulated internal supply, typically 7.7V from VIN, for internal loads and the GATE driver; bypass with 4.7µF close to the pin, or connect directly to VIN if VIN is always ≤ 8V."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, same function as pin 4."
      },
      {
        "number": "22",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, same function as pin 4."
      },
      {
        "number": "23",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin (110V absolute maximum) that must be locally bypassed with a 0.22µF or larger capacitor placed close to the IC."
      },
      {
        "number": "24",
        "name": "EN/UVLO",
        "type": "input",
        "description": "Enable and undervoltage lockout pin with an accurate 1.22V falling threshold; tie to 0.4V or less to disable the device, and it is rated 110V absolute maximum."
      },
      {
        "number": "25",
        "name": "OVLO",
        "type": "input",
        "description": "Input overvoltage lockout pin with an accurate 1.25V rising threshold that enables switching when power is OK; rated 8V absolute maximum."
      },
      {
        "number": "26",
        "name": "IVINN",
        "type": "passive",
        "description": "Connection point for the negative terminal of the input current sense resistor RINSNS, where IIN = 60mV/RINSNS."
      },
      {
        "number": "27",
        "name": "IVINP",
        "type": "passive",
        "description": "Connection point for the positive terminal of the input current sense resistor RINSNS."
      },
      {
        "number": "28",
        "name": "IVINCOMP",
        "type": "output",
        "description": "Input current sense amplifier output with VIVINCOMP = IIN • RINSNS • 20; it requires a 10nF or larger capacitor to GND and must not be left open or loaded with current."
      },
      {
        "number": "29",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad ground that must be soldered directly to the PCB ground plane."
      }
    ],
    "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 pin-configuration text on page 2 is scrambled, so the pin-to-number mapping was taken from the p; Pin types are KiCad ERC classes inferred from the pin descriptions (the datasheet does not state ERC; The 7-of-32-page extract does not include the TSSOP package outline or its dimensions, so package-le"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0735,
        "at": "2026-10-18T18:31:58"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590006638330339328",
        "pages": 32,
        "sha256": "11ad89e3aee599fa",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "lt3795hfe-pbf-etched.step",
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        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  }
}