component
LT3795HFE#PBF
Public Made by Adomby adom
Analog Devices LED Drivers, TSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"schema_version": 1,
"type": "component",
"slug": "lt3795hfe-pbf",
"title": "LT3795HFE#PBF",
"brief": "Analog Devices LED Drivers, TSSOP-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",
"led drivers",
"lt3795hfe#pbf",
"factory-2.0.0",
"extractor-text"
],
"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",
"model_3d": "lt3795hfe-pbf-hero.glb",
"model_3d_plain": "lt3795hfe-pbf-etched.glb",
"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
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
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"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
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"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "lt3795hfe-pbf-etched.step",
"role": "eda",
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"seat": "z = 0",
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"footprint_binding": "identity",
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"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Analog Devices",
"Package": "TSSOP-28-EP",
"Category": "LED Drivers",
"Pins": "29"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "11ad89e3aee599fa1e1ad636a13fdd65f67a94b21758f5c9a87a1867875452b8",
"rows": [
{
"name": "VIN",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 110,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "EN/UVLO",
"symbol": "EN/UVLO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 110,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "ISP, ISN",
"symbol": "ISP, ISN",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 110,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "IVINP, IVINN",
"symbol": "IVINP, IVINN",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 110,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VIN - IVINN",
"symbol": "VIN - IVINN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 4,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "PWM, SHORTLED, OPENLED",
"symbol": "PWM, SHORTLED, OPENLED",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 12,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "FB, RAMP, OVLO",
"symbol": "FB, RAMP, OVLO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 8,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "CTRL1, CTRL2",
"symbol": "CTRL1, CTRL2",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 15,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "ISMON, IVINCOMP",
"symbol": "ISMON, IVINCOMP",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VC, VREF, SS",
"symbol": "VC, VREF, SS",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "RT",
"symbol": "RT",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 2,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Operating Junction Temperature Range (LT3795H)",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "LT3795H grade",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum Junction Temperature",
"symbol": "TJMAX",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Thermal Resistance, Junction to Ambient",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 30,
"max": null,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Thermal Resistance, Junction to Case",
"symbol": "θJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 10,
"max": null,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VIN Minimum Operating Voltage",
"symbol": "VIN",
"kind": "electrical",
"unit": "V",
"min": 4.5,
"typ": null,
"max": null,
"conditions": "VIN Tied to INTVCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN Shutdown IQ",
"symbol": "IQ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 10,
"conditions": "EN/UVLO = 0V, PWM = 0V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN Shutdown IQ",
"symbol": "IQ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 22,
"conditions": "EN/UVLO = 1.15V, PWM = 0V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN Operating IQ (Not Switching)",
"symbol": "IQ",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2.9,
"max": 3.5,
"conditions": "RT = 82.5k to GND, FB = 1.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VREF Voltage",
"symbol": "VREF",
"kind": "electrical",
"unit": "V",
"min": 1.97,
"typ": 2.015,
"max": 2.06,
"conditions": "–100µA ≤ IREF ≤ 10µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VREF Pin Line Regulation",
"symbol": "VREF",
"kind": "electrical",
"unit": "m%/V",
"min": null,
"typ": null,
"max": 1.5,
"conditions": "4.5V < VIN < 110V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "SENSE Current Limit Threshold",
"symbol": "SENSE",
"kind": "electrical",
"unit": "mV",
"min": 100,
"typ": 117,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "SS Sourcing Current",
"symbol": "SS",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 28,
"max": null,
"conditions": "SS = 0V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Full Scale LED Current Sense Threshold (V(ISP-ISN))",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 243,
"typ": 250,
"max": 257,
"conditions": "ISP = 48V, CTRL1 ≥ 1.2V, CTRL2 ≥ 1.2V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "9/10th LED Current Sense Threshold (V(ISP-ISN))",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 220,
"typ": 225,
"max": 230,
"conditions": "ISP = 48V, CTRL1 = 1V, CTRL2 = 1.2V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "1/2 LED Current Sense Threshold (V(ISP-ISN))",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 119,
"typ": 125,
"max": 130,
"conditions": "ISP = 48V, CTRL1 = 0.6V, CTRL2 = 1.2V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "1/10th LED Current Sense Threshold (V(ISP-ISN))",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 16,
"typ": 25,
"max": 32,
"conditions": "ISP = 48V, CTRL1 = 0.2V, CTRL2 = 1.2V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ISP/ISN Current Monitor Voltage (VISMON)",
"symbol": "VISMON",
"kind": "electrical",
"unit": "V",
"min": 0.96,
"typ": 1,
"max": 1.04,
"conditions": "V(ISP-ISN) = 250mV, ISP = 48V, –50µA ≤ IISMON ≤ 0 µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ISP/ISN Overcurrent Protection Threshold (V(ISP-ISN))",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 360,
"typ": 375,
"max": 390,
"conditions": "ISN = 48V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "CTRL1, CTRL2 Input Bias Current",
"symbol": "ICTRL",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 50,
"max": 200,
"conditions": "Current Out of Pin, CTRL = 1V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ISP/ISN Current Sense Amplifier Input Common Mode Range",
"symbol": "VISP, VISN",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 110,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ISP/ISN Input Current Bias Current (Combined)",
"symbol": "IISP, IISN",
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