OC5128

{
  "schema_version": 1,
  "type": "component",
  "slug": "oc5128",
  "title": "OC5128",
  "brief": "OCX LED Drivers, ESOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led-drv",
    "oc5128"
  ],
  "component": {
    "mpn": "OC5128",
    "manufacturer": "OCX",
    "package": "ESOP-8",
    "pin_count": 8,
    "category": "LED-drv",
    "subcategory": "LED Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8578978e8ac3cee0489fe70de46daf5b.pdf",
    "parts": {
      "symbol": "oc5128.kicad_sym",
      "footprint": "oc5128.kicad_mod",
      "model_3d": "oc5128-etched.glb",
      "model_3d_plain": "oc5128.glb",
      "model_3d_step": "oc5128-etched.step",
      "model_3d_step_plain": "oc5128.step",
      "lbr": "oc5128.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the chip. Connect to system ground with a short, wide trace to the current sense resistor return."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip supply pin. Fed from VIN through an external supply resistor RVDD; an internal shunt regulator clamps VDD at ~5.8V (max clamp current 10mA). UVLO rising threshold 4.1V with 0.4V hysteresis."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "output",
        "description": "Switch node; drain of the internal 100V power MOSFET. Connects to the inductor / freewheeling diode in the buck topology. Absolute maximum voltage 100V. The exposed thermal pad is internally tied to SW."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Inductor current sense input. Average CS voltage is regulated to 200mV (192-208mV) across the sense resistor RCS; LED current ILED = 0.2V / RCS. Route to RCS and GND with short, wide traces."
      },
      {
        "number": "6",
        "name": "MODE",
        "type": "input",
        "description": "Brightness (dimming) select input with internal ~80kΩ pull-down. Float or tie to GND → full-brightness (100% ILED). Tie to a logic high (VDD) → half-brightness (ILED/2). Absolute max −0.3V to VDD+0.3V."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/8578978e8ac3cee0489fe70de46daf5b.pdf",
        "pages": 6,
        "sha256": "531c4e86661633eb",
        "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"
    },
    "models_3d": [
      {
        "file": "oc5128.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "oc5128-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b940752893ed6cec38dc907886cc6d8a88eec03c47382277a6dc5c58be7798ea",
        "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": [
    "oc5128"
  ],
  "discovery_pitch": "OC5128 (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",
    "oc5128.kicad_sym",
    "oc5128.kicad_mod",
    "oc5128.glb",
    "oc5128.step",
    "oc5128.lbr",
    "docs/hero.png",
    "docs/oc5128-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "oc5128-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T03:29:42.494Z"
}