OC5022B

{
  "schema_version": 1,
  "type": "component",
  "slug": "oc5022b",
  "title": "OC5022B",
  "brief": "OCX LED Drivers, ESOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led-drv",
    "oc5022b"
  ],
  "component": {
    "mpn": "OC5022B",
    "manufacturer": "OCX",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "LED-drv",
    "subcategory": "LED Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/204d08dc987571514452230b59902e06.pdf",
    "parts": {
      "symbol": "oc5022b.kicad_sym",
      "footprint": "oc5022b.kicad_mod",
      "model_3d": "oc5022b-etched.glb",
      "model_3d_plain": "oc5022b.glb",
      "model_3d_step": "oc5022b-etched.step",
      "model_3d_step_plain": "oc5022b.step",
      "lbr": "oc5022b.lbr"
    },
    "distributor_links": {
      "lcsc": "C842718"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground return. Connect directly to the current-sense resistor RCS ground node with a short, wide trace to preserve output-current accuracy."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating (悬空不接)."
      },
      {
        "number": "3",
        "name": "DIM",
        "type": "input",
        "description": "Dimming control input supporting both PWM and linear (analog) dimming. Pulling DIM to GND shuts off the LED output; DIM > 3.1V gives 100% output current. Linear dimming range is 1.1V-3.1V (shutdown threshold ~0.9V). Must not be left floating; tie high when unused, and add a small (>=10nF) cap to GND when using linear dimming."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "output",
        "description": "Switch node; drain of the internal 60V power MOSFET (RDSON ~70mOhm at VGS=5V). Connect to the inductor and freewheel diode of the buck stage. The ESOP-8 exposed pad is internally tied to SW."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Inductor peak-current sense input. Trips at VCS_TH = 245-265mV (typ. 255mV) across the external RCS sense resistor to terminate the on-time. Pins 5 and 6 are internally tied together; use a short, wide Kelvin connection to RCS."
      },
      {
        "number": "6",
        "name": "CS",
        "type": "input",
        "description": "Inductor peak-current sense input (paralleled with pin 5). Connect together with pin 5 to the RCS/inductor return node."
      },
      {
        "number": "7",
        "name": "TOFF",
        "type": "input",
        "description": "Off-time programming pin. An external capacitor COFF to GND sets TOFF = 0.51 * 150kOhm * (COFF + 8pF) + 61ns. With no capacitor the internal minimum TOFF is ~650ns."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip supply, internally clamped by a Zener to ~5.5V (max Zener sink current 10mA). Powered from VIN through a dropping resistor RVDD = (VIN - 5.5V) / IVDD (IVDD typ 2mA). UVLO releases at ~2.6V rising with 0.4V hysteresis."
      },
      {
        "number": "9",
        "name": "EXPOSED PAD",
        "type": "power_in",
        "description": "Exposed thermal pad. Present in the package land pattern; connect it per the manufacturer datasheet thermal recommendation. Added because the footprint carries this pad and the symbol had no pin for it.",
        "source": "derived-from-footprint"
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/204d08dc987571514452230b59902e06.pdf",
        "pages": 7,
        "sha256": "450ce8ff55ea9080",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm@sha256:5848244c5e72002e",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "oc5022b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "oc5022b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "749689be6b8d21866d387667e73788ae89dd850b804c9efe80587dcb41cb1752",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "OCX",
      "Package": "ESOP-8",
      "Category": "LED-drv",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "oc5022b"
  ],
  "discovery_pitch": "OC5022B (OCX) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "oc5022b.kicad_sym",
    "oc5022b.kicad_mod",
    "oc5022b.glb",
    "oc5022b.step",
    "oc5022b-etched.step",
    "oc5022b.lbr",
    "docs/hero.png",
    "docs/oc5022b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "updated_at": "2026-09-25T03:29:34.478Z"
}