BQ7790509PWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq7790509pwr",
  "title": "BQ7790509PWR",
  "brief": "Texas Instruments Battery Management, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "bq7790509pwr"
  ],
  "component": {
    "mpn": "BQ7790509PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://www.ti.com/cn/lit/gpn/bq77905",
    "parts": {
      "symbol": "bq7790509pwr.kicad_sym",
      "footprint": "bq7790509pwr.kicad_mod",
      "model_3d": "bq7790509pwr-etched.glb",
      "model_3d_plain": "bq7790509pwr.glb",
      "model_3d_step": "bq7790509pwr-etched.step",
      "model_3d_step_plain": "bq7790509pwr.step",
      "lbr": "bq7790509pwr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input. Powers the device from the top of the cell stack it monitors. Absolute max per-cell input rating is 36 V."
      },
      {
        "number": "2",
        "name": "AVDD",
        "type": "power_out",
        "description": "Analog supply regulator output. Connect only to a decoupling capacitor; do not load externally."
      },
      {
        "number": "3",
        "name": "VC5",
        "type": "input",
        "description": "Cell 5 voltage sense input. On the 4-cell BQ77904 variant this pin must be tied to pin 4 (VC4); on the BQ77905 it connects to the top of cell 5."
      },
      {
        "number": "4",
        "name": "VC4",
        "type": "input",
        "description": "Cell 4 voltage sense input. Connects to the top of cell 4 through a series input resistor."
      },
      {
        "number": "5",
        "name": "VC3",
        "type": "input",
        "description": "Cell 3 voltage sense input. Connects to the top of cell 3 through a series input resistor."
      },
      {
        "number": "6",
        "name": "VC2",
        "type": "input",
        "description": "Cell 2 voltage sense input. Connects to the top of cell 2 through a series input resistor."
      },
      {
        "number": "7",
        "name": "VC1",
        "type": "input",
        "description": "Cell 1 voltage sense input. Connects to the top of cell 1 through a series input resistor."
      },
      {
        "number": "8",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground reference for the internal analog circuitry."
      },
      {
        "number": "9",
        "name": "SRP",
        "type": "input",
        "description": "Current sense positive input. Connect to the battery side of the external sense resistor. Used to measure charge/discharge overcurrent and short-circuit conditions (thresholds in the -85 mV to +340 mV range depending on fault type)."
      },
      {
        "number": "10",
        "name": "SRN",
        "type": "input",
        "description": "Current sense negative input. Connect to the PACK- side of the external sense resistor. Reference for the current-sense comparators."
      },
      {
        "number": "11",
        "name": "DSG",
        "type": "output",
        "description": "Discharge FET gate driver output. Drives the gate of the external low-side NMOS discharge FET."
      },
      {
        "number": "12",
        "name": "CHGU",
        "type": "output",
        "description": "CHG FET signal for stacked configurations. Used on the upper device of a stack to feed its CHG signal to the CTRC pin of the device below."
      },
      {
        "number": "13",
        "name": "CHG",
        "type": "output",
        "description": "Charge FET gate driver output. Used on a single device or on the bottom device of a stack to drive the external low-side NMOS charge FET."
      },
      {
        "number": "14",
        "name": "LD",
        "type": "input",
        "description": "PACK- load removal detection input. Senses the PACK- node to determine when the load has been removed for fault recovery."
      },
      {
        "number": "15",
        "name": "TS",
        "type": "input",
        "description": "Thermistor temperature-sense input. Connect a 103AT NTC thermistor between TS and VSS; connect a 10-kΩ bias resistor from VTB to TS. Tie a 10-kΩ resistor from TS to AVSS if temperature protection is not used."
      },
      {
        "number": "16",
        "name": "VTB",
        "type": "output",
        "description": "Thermistor bias output. Provides the bias voltage for the external thermistor divider on the TS pin."
      },
      {
        "number": "17",
        "name": "CCFG",
        "type": "input",
        "description": "Cell in series configuration input. Sets the number of cells the device is configured to monitor."
      },
      {
        "number": "18",
        "name": "CTRC",
        "type": "input",
        "description": "CHG override input. In a stacked configuration, receives the CHGU signal from the device above to force the CHG driver state."
      },
      {
        "number": "19",
        "name": "CTRD",
        "type": "input",
        "description": "DSG override input. In a stacked configuration, receives the DSG signal from the device above to force the DSG driver state."
      },
      {
        "number": "20",
        "name": "DVSS",
        "type": "power_in",
        "description": "Digital ground reference for the internal digital circuitry."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/bq77905",
        "pages": 48,
        "sha256": "f04162b24e7e7c22",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bq7790509pwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bq7790509pwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "304711714174529f10416aaeee27d0e4a4de2e10fecdc30cc97f89cbdc12c8f0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-20",
      "Category": "Power Management (PMIC)",
      "Pins": "20"
    }
  },
  "variants": [
    {
      "mpn": "BQ7790509PWR",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bq7790509pwr"
  ],
  "discovery_pitch": "BQ7790509PWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bq7790509pwr.kicad_sym",
    "bq7790509pwr.kicad_mod",
    "bq7790509pwr.glb",
    "bq7790509pwr.step",
    "bq7790509pwr.lbr",
    "docs/hero.png",
    "docs/bq7790509pwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T18:06:20.275Z"
}