BQ24735RGRR

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq24735rgrr",
  "title": "BQ24735RGRR",
  "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)",
    "bq24735rgrr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BQ24735RGRR",
    "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": {
      "symbol": "bq24735rgrr.kicad_sym",
      "footprint": "bq24735rgrr.kicad_mod",
      "model_3d": "bq24735rgrr-etched.glb",
      "model_3d_plain": "bq24735rgrr.glb",
      "model_3d_step": "bq24735rgrr-etched.step",
      "model_3d_step_plain": "bq24735rgrr.step",
      "lbr": "bq24735rgrr.lbr"
    },
    "distributor_links": {
      "lcsc": "C353879",
      "digikey": "296-47742-2-ND",
      "mouser": "595-BQ24735RGRR"
    },
    "distributor_check": {
      "checked_at": "2026-10-01T18:03:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-47742-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-BQ24735RGRR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ACN",
        "type": "input",
        "description": "Input current sense resistor negative input; place an optional 0.1µF ceramic capacitor from ACN to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V."
      },
      {
        "number": "2",
        "name": "ACP",
        "type": "input",
        "description": "Input current sense resistor positive input; place a 0.1µF ceramic capacitor from ACP to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V."
      },
      {
        "number": "3",
        "name": "CMSRC",
        "type": "input",
        "description": "ACDRV charge pump source input; connect to the common source of ACFET (Q1) and RBFET (Q2) through a 4kΩ series resistor to limit in-rush current; sets the reference for the 6V ACDRV gate overdrive."
      },
      {
        "number": "4",
        "name": "ACDRV",
        "type": "output",
        "description": "Charge pump output driving the adapter NMOS selector (ACFET) and reverse-blocking NMOS (RBFET); outputs VCMSRC + 6V when ACDET is 2.4V-3.15V and VCC is above UVLO; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ, turn-off resistance 5kΩ-7.4kΩ."
      },
      {
        "number": "5",
        "name": "ACOK",
        "type": "tri_state",
        "description": "AC adapter detection open-drain output; pulled HIGH by external pull-up when ACDET is 2.4V-3.15V, VCC > UVLO, and VCC is ≥275mV above SRN; pulled LOW internally otherwise; ACOK rising deglitch 150ms (first insertion) or 1.3s (default subsequent); output saturation voltage ≤500mV at 5mA."
      },
      {
        "number": "6",
        "name": "ACDET",
        "type": "input",
        "description": "Adapter detection analog input; program the valid adapter threshold with an external resistor divider from adapter input to GND; ACOK rising threshold 2.4V, ACOVP threshold 3.15V; when above 0.6V and VCC > UVLO, REGN LDO, ACOK comparator, and IOUT become active."
      },
      {
        "number": "7",
        "name": "IOUT",
        "type": "output",
        "description": "Buffered current sense amplifier output selectable between adapter current (ACP-ACN) or charge current (SRP-SRN) via SMBus ChargeOption() bit[5]; output equals 20× the differential sense voltage; output range 0V-3.3V, max output current 1mA, max load capacitance 100pF."
      },
      {
        "number": "8",
        "name": "SDA",
        "type": "bidirectional",
        "description": "SMBus open-drain data I/O; connect to SMBus data line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; output saturation voltage ≤500mV at 5mA; supports 10kHz-100kHz clock."
      },
      {
        "number": "9",
        "name": "SCL",
        "type": "input",
        "description": "SMBus open-drain clock input; connect to SMBus clock line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; supports 10kHz-100kHz clock frequency."
      },
      {
        "number": "10",
        "name": "ILIM",
        "type": "input",
        "description": "Charge current limit analog input; program with a resistor divider from 3.3V rail to GND; the lower of ILIM or the charge current DAC sets the regulation limit; charge disabled when VILIM < 75mV (CE falling threshold), charge enabled when VILIM > 105mV (CE rising threshold); to disable ILIM control pull above 1.6V."
      },
      {
        "number": "11",
        "name": "BATDRV",
        "type": "output",
        "description": "Charge pump output driving the battery-to-system NMOS (BATFET); outputs VSRN + 6V to turn on BATFET and VSRN to turn off BATFET; charge pump current limit 40µA-60µA; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ."
      },
      {
        "number": "12",
        "name": "SRN",
        "type": "input",
        "description": "Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω series resistor then to GND via 0.1µF for common-mode filtering and across sense resistor via 0.1µF for differential filtering; output common-mode range 0V-19.2V."
      },
      {
        "number": "13",
        "name": "SRP",
        "type": "input",
        "description": "Charge current sense resistor positive input; connect through a 10Ω series resistor to the sense resistor; place a 0.1µF capacitor between SRP and SRN for differential filtering; SRP capacitance must not exceed 0.1µF for correct cycle-by-cycle OCP detection."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "IC analog ground; on PCB connect to analog ground plane and connect to power ground plane only through the exposed PowerPad beneath the IC."
      },
      {
        "number": "15",
        "name": "LODRV",
        "type": "output",
        "description": "Low-side synchronous power MOSFET gate driver output; connect to low-side n-channel MOSFET gate; turn-on resistance 7.5Ω typ / 12Ω max at VREGN = 6V, 10mA; turn-off resistance 0.9Ω typ / 1.4Ω max; dead time from high side to low side 20ns."
      },
      {
        "number": "16",
        "name": "REGN",
        "type": "power_out",
        "description": "Internal 6V linear regulator output supplied from VCC; regulates to 5.5V-6.5V when VCC > 6.5V and ACDET > 0.6V; current limit 50mA typ (75mA max) during charge; connect a 1µF ceramic capacitor to GND for stability."
      },
      {
        "number": "17",
        "name": "BTST",
        "type": "passive",
        "description": "High-side MOSFET gate driver bootstrap supply; connect a 0.047µF ceramic capacitor from BTST to PHASE and an external Schottky bootstrap diode from REGN to BTST; a low-side refresh pulse is triggered when VBTST-VPHASE falls below 4.3V typ."
      },
      {
        "number": "18",
        "name": "HIDRV",
        "type": "output",
        "description": "High-side synchronous power MOSFET gate driver output; connect to high-side n-channel MOSFET gate; turn-on resistance 6Ω typ / 10Ω max at VBTST-VPHASE = 5.5V, 10mA; turn-off resistance 0.65Ω typ / 1.3Ω max; dead time from low side to high side 20ns."
      },
      {
        "number": "19",
        "name": "PHASE",
        "type": "passive",
        "description": "High-side MOSFET driver source and PWM switching node; connect to the source of the high-side n-channel MOSFET; voltage range −2V to 24V (recommended operating); low-side short-circuit protection monitored between PHASE and GND."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Input supply pin; diode-OR connection from AC adapter or battery; operating range 4.5V to 24V; UVLO rising threshold 3.5V-4V, falling hysteresis 340mV; use a 10Ω resistor and 1µF capacitor to GND as a low-pass filter to limit inrush current."
      },
      {
        "number": "21",
        "name": "PowerPAD",
        "type": "power_in",
        "description": "Exposed thermal and ground pad beneath the IC; analog ground and power ground are star-connected at this pad; must always be soldered to the PCB with thermal vias to analog and power ground planes; θJCbot = 4.4°C/W."
      }
    ],
    "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-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "1/21 pins cited to the wrong page (name found elsewhere): ['21:PowerPAD@p14']"
        ],
        "pages_sent": 45,
        "cost_usd": 0.5067,
        "at": "2026-10-01T18:03:22"
      },
      "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"
    }
  },
  "variants": [],
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  "discovery_pitch": "BQ24735RGRR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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}