BQ24078RGTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq24078rgtr",
  "title": "BQ24078RGTR",
  "brief": "Texas Instruments Battery Management, VQFN-16-EP(3x3). 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)",
    "bq24078rgtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BQ24078RGTR",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-16-EP(3x3)",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://www.ti.com/lit/ds/symlink/bq24078.pdf",
    "parts": {
      "symbol": "bq24078rgtr.kicad_sym",
      "footprint": "bq24078rgtr.kicad_mod",
      "model_3d": "bq24078rgtr-etched.glb",
      "model_3d_plain": "bq24078rgtr.glb",
      "model_3d_step": "bq24078rgtr-etched.step",
      "model_3d_step_plain": "bq24078rgtr.step",
      "lbr": "bq24078rgtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C473396"
    },
    "pins": [
      {
        "number": "1",
        "name": "TS",
        "type": "input",
        "description": "External NTC thermistor input monitoring 10-kΩ thermistor in battery pack to prevent dangerous over-temperature conditions during charging."
      },
      {
        "number": "2",
        "name": "BAT",
        "type": "bidirectional",
        "description": "Charger power stage output and battery voltage sense input for positive battery terminal; bypass to VSS with 4.7-μF to 47-μF ceramic capacitor."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "bidirectional",
        "description": "Charger power stage output and battery voltage sense input for positive battery terminal; bypass to VSS with 4.7-μF to 47-μF ceramic capacitor."
      },
      {
        "number": "4",
        "name": "CE",
        "type": "input",
        "description": "Charge enable active-low input with internal 285-kΩ pull-down; drive low to enable charging and high to suspend charging with OUT remaining active."
      },
      {
        "number": "5",
        "name": "EN2",
        "type": "input",
        "description": "Input current limit configuration input with internal 285-kΩ pull-down; use with EN1 to select USB compliance mode and input current limit."
      },
      {
        "number": "6",
        "name": "EN1",
        "type": "input",
        "description": "Input current limit configuration input with internal 285-kΩ pull-down; use with EN2 to select USB compliance mode and input current limit."
      },
      {
        "number": "7",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power good status indication output that pulls to VSS when valid input source is detected within VBAT+VIN(DT) < VIN < VOVP range."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground connection; must connect to thermal pad and circuit ground rail at all times as primary ground input for device."
      },
      {
        "number": "9",
        "name": "CHG",
        "type": "output",
        "description": "Open-drain charging status indication output that pulls to VSS during battery charging and goes high-impedance when charging is complete or disabled."
      },
      {
        "number": "10",
        "name": "OUT",
        "type": "output",
        "description": "System supply output providing regulated power to external load when input is valid; bypass to VSS with 4.7-μF to 47-μF ceramic capacitor."
      },
      {
        "number": "11",
        "name": "OUT",
        "type": "output",
        "description": "System supply output providing regulated power to external load when input is valid; bypass to VSS with 4.7-μF to 47-μF ceramic capacitor."
      },
      {
        "number": "12",
        "name": "ILIM",
        "type": "input",
        "description": "Adjustable current limit programming input; connect 1100-Ω to 8-kΩ resistor to VSS to program maximum input current when EN2=1 and EN1=0."
      },
      {
        "number": "13",
        "name": "IN",
        "type": "power_in",
        "description": "Input power connection from AC adapter or USB port with operating range 4.35 V to 6.6 V; accepts up to 26 V without damage but operation is suspended."
      },
      {
        "number": "14",
        "name": "TMR",
        "type": "input",
        "description": "Timer programming input controlling pre-charge and fast-charge safety timers; connect 18-kΩ to 72-kΩ resistor to VSS to program timer duration."
      },
      {
        "number": "15",
        "name": "SYSOFF",
        "type": "input",
        "description": "System enable input with internal pull-up to VBAT (~5 MΩ); drive high to disconnect battery from system output and disable charging."
      },
      {
        "number": "16",
        "name": "ISET",
        "type": "bidirectional",
        "description": "Fast charge current programming input/output; connect 590-Ω to 8.9-kΩ resistor to VSS to program fast charge current; output voltage monitors charging current."
      },
      {
        "number": "17",
        "name": "Thermal Pad",
        "type": "power_in",
        "description": "Exposed thermal pad with internal electrical connection to VSS for IC junction temperature management; connect to circuit board ground plane via matrix."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Thermal pad is referenced as 'EXPOSED PAD 17' in the stencil example (page 42) but shown as '– –' wi; PGOOD (pin 7) and CHG (pin 9) are open-drain outputs; may be more accurately classified as tri_state"
        ],
        "pages_sent": 43,
        "cost_usd": 0.5581,
        "at": "2026-09-23T12:32:31"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/bq24078.pdf",
        "pages": 43,
        "sha256": "5403169e7534f8c4",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bq24078rgtr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          3.0,
          0.785
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bq24078rgtr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          3.0,
          0.785
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "47dc9533df6fdb7d5aee4c181077ee8e01b63dcadc92c2f05730aa7cf6da36e2",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-16-EP(3x3)",
      "Category": "Power Management (PMIC)",
      "Pins": "17"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bq24078rgtr"
  ],
  "discovery_pitch": "BQ24078RGTR (Texas Instruments) 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",
    "bq24078rgtr.kicad_sym",
    "bq24078rgtr.kicad_mod",
    "bq24078rgtr.glb",
    "bq24078rgtr.step",
    "bq24078rgtr.lbr",
    "docs/hero.png",
    "docs/bq24078rgtr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T18:01:17.609Z"
}