BQ24735RGRT

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq24735rgrt",
  "title": "BQ24735RGRT",
  "brief": "Texas Instruments Battery Management, VQFN-20(3.5x3.5). 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)",
    "bq24735rgrt",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "BQ24735RGRT",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-20(3.5x3.5)",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://www.ti.com/cn/lit/gpn/bq24735",
    "parts": {
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      "lbr": "bq24735rgrt.lbr"
    },
    "distributor_links": {
      "lcsc": "C968583",
      "digikey": "296-29535-2-ND",
      "mouser": "595-BQ24735RGRT"
    },
    "distributor_check": {
      "checked_at": "2026-10-06T03:44:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-29535-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-BQ24735RGRT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ACN",
        "type": "input",
        "description": "Input current sense resistor negative input; place optional 0.1µF ceramic from ACN to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering."
      },
      {
        "number": "2",
        "name": "ACP",
        "type": "input",
        "description": "Input current sense resistor positive input; place 0.1µF ceramic from ACP to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering."
      },
      {
        "number": "3",
        "name": "CMSRC",
        "type": "passive",
        "description": "ACDRV charge pump source input; a 4kΩ resistor to the common source of ACFET (Q1) and RBFET (Q2) limits in-rush current on the pin."
      },
      {
        "number": "4",
        "name": "ACDRV",
        "type": "output",
        "description": "Charge pump output driving ACFET and RBFET gates, 6V above CMSRC when ACDET is between 2.4V and 3.15V, VCC is above UVLO and VCC is 275mV above SRN; use a 4kΩ series resistor to the gates."
      },
      {
        "number": "5",
        "name": "ACOK",
        "type": "output",
        "description": "AC adapter detection open-drain output, pulled high by an external 10kΩ pull-up when ACDET is between 2.4V and 3.15V, VCC is above UVLO and 275mV above SRN, otherwise pulled low by the internal MOSFET."
      },
      {
        "number": "6",
        "name": "ACDET",
        "type": "input",
        "description": "Adapter detection input programmed by a resistor divider from the adapter input to GND; above 0.6V with VCC above UVLO enables the REGN LDO, ACOK comparator and IOUT."
      },
      {
        "number": "7",
        "name": "IOUT",
        "type": "output",
        "description": "Buffered adapter or charge current output selectable by SMBus ChargeOption(), at 20 times the sense resistor differential voltage; use 100pF or less decoupling capacitor to GND."
      },
      {
        "number": "8",
        "name": "SDA",
        "type": "bidirectional",
        "description": "SMBus open-drain data I/O connected to the host or smart battery data line with a 10kΩ pull-up."
      },
      {
        "number": "9",
        "name": "SCL",
        "type": "input",
        "description": "SMBus open-drain clock input connected to the host or smart battery clock line with a 10kΩ pull-up."
      },
      {
        "number": "10",
        "name": "ILIM",
        "type": "input",
        "description": "Charge current limit input set by a divider from the 3.3V rail; the lower of ILIM or DAC limit sets the regulation limit, above 1.6V disables ILIM control, below 75mV disables charge/discharge and above 105mV enables it."
      },
      {
        "number": "11",
        "name": "BATDRV",
        "type": "output",
        "description": "Charge pump output driving the battery-to-system BATFET, 6V above SRN to turn it on and equal to SRN to turn it off; use a 4kΩ resistor to the gate."
      },
      {
        "number": "12",
        "name": "SRN",
        "type": "input",
        "description": "Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω resistor with 0.1µF to GND for filtering."
      },
      {
        "number": "13",
        "name": "SRP",
        "type": "input",
        "description": "Charge current sense resistor positive input; connect through a 10Ω resistor to the sense resistor with 0.1µF differential filtering capacitor."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "IC ground; connect to the analog ground plane and only to the power ground plane through the PowerPAD underneath the IC."
      },
      {
        "number": "15",
        "name": "LODRV",
        "type": "output",
        "description": "Low side power MOSFET driver output connected to the low side n-channel MOSFET gate."
      },
      {
        "number": "16",
        "name": "REGN",
        "type": "power_out",
        "description": "6V linear regulator output supplied from VCC, active when ACDET is above 0.6V and VCC is above UVLO; connect a 1µF ceramic capacitor to GND."
      },
      {
        "number": "17",
        "name": "BTST",
        "type": "power_in",
        "description": "High side MOSFET driver power supply; connect a 0.047µF capacitor from BTST to PHASE and a bootstrap Schottky diode from REGN to BTST."
      },
      {
        "number": "18",
        "name": "HIDRV",
        "type": "output",
        "description": "High side power MOSFET driver output connected to the high side n-channel MOSFET gate."
      },
      {
        "number": "19",
        "name": "PHASE",
        "type": "passive",
        "description": "High side power MOSFET driver source, connected to the source of the high side n-channel MOSFET."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Input supply, diode-ORed from adapter or battery voltage; use a 10Ω resistor and 1µF capacitor to ground as a low pass filter to limit inrush current."
      },
      {
        "number": "21",
        "name": "PowerPAD",
        "type": "power_in",
        "description": "Exposed pad beneath the IC joining analog and power ground at a single star point; always solder to the board with vias to the ground planes, also serves as thermal pad."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 21 added from the footprint"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1556,
        "at": "2026-10-06T03:44:01"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/bq24735",
        "pages": 45,
        "sha256": "49d4e7a43dd79779",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-20(3.5x3.5)",
      "Category": "Power Management (PMIC)",
      "Pins": "21"
    }
  },
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  "discovery_pitch": "BQ24735RGRT (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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