BQ25703ARSNR

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  "type": "component",
  "slug": "bq25703arsnr",
  "title": "BQ25703ARSNR",
  "brief": "Texas Instruments Battery Management, VQFN-32-EP(4x4). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "BQ25703ARSNR",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-32-EP(4x4)",
    "pin_count": 33,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://www.ti.com/lit/ds/symlink/bq25703arsnr.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "VBUS",
        "type": "power_in",
        "description": "Charger input voltage (0 to 24 V operating). An input low-pass filter of 1Ω and 0.47 µF (minimum) is recommended."
      },
      {
        "number": "2",
        "name": "ACN",
        "type": "input",
        "description": "Input current sense resistor negative input. Leakage on ACP/ACN are matched. Series resistors on ACP and ACN pins are placed between sense resistor and filter cap."
      },
      {
        "number": "3",
        "name": "ACP",
        "type": "input",
        "description": "Input current sense resistor positive input. Leakage on ACP/ACN are matched."
      },
      {
        "number": "4",
        "name": "CHRG_OK",
        "type": "output",
        "description": "Open-drain active-high indicator that a good power source is connected to the charger input. Pull up to a rail with a 10-kΩ resistor. HIGH when VBUS rises above 3.5V or falls below 24.5V after 50ms deglitch; LOW when VBUS falls below 3.2V or rises above 26V."
      },
      {
        "number": "5",
        "name": "EN_OTG",
        "type": "input",
        "description": "Active HIGH input to enable OTG mode. When EN_OTG is HIGH and REG0x35[4] is HIGH, OTG can be enabled."
      },
      {
        "number": "6",
        "name": "ILIM_HIZ",
        "type": "input",
        "description": "Input current limit input. Program ILIM_HIZ voltage via a resistor divider from supply rail to ground: V(ILIM_HIZ) = 1V + 40 × IDPM × RAC. Below 0.4 V the device enters Hi-Z; above 0.8 V normal operation."
      },
      {
        "number": "7",
        "name": "VDDA",
        "type": "power_in",
        "description": "Internal reference bias pin. Connect a 10-Ω resistor from REGN to VDDA and a 1-µF ceramic capacitor from VDDA to power ground."
      },
      {
        "number": "8",
        "name": "IADPT",
        "type": "output",
        "description": "Buffered adapter current output. V(IADPT) = 20 or 40 × (V(ACP) − V(ACN)), ratio selectable in REG0x00[4]. Place resistor to ground for inductor value (137 kΩ for 2.2 µH). Output clamped below 3.3 V."
      },
      {
        "number": "9",
        "name": "IBAT",
        "type": "output",
        "description": "Buffered battery current output selected by I2C. V(IBAT) = 8 or 16 × (V(SRP) − V(SRN)) for charge current, or 8 or 16 × (V(SRN) − V(SRP)) for discharge current, with ratio in REG0x00[3]. Output clamped below 3.3 V; may float if unused."
      },
      {
        "number": "10",
        "name": "PSYS",
        "type": "output",
        "description": "Current-mode system power monitor. Output current proportional to total power from adapter and battery, gain selectable via I2C. Place resistor from PSYS to ground to generate output voltage. Output clamped below 3.3 V."
      },
      {
        "number": "11",
        "name": "PROCHOT",
        "type": "output",
        "description": "Active-low open-drain processor-hot indicator output. Monitors adapter input current, battery discharge current and system voltage. Asserts a minimum 10-ms pulse (width adjustable in REG0x36[5:2]) after any event in the PROCHOT profile."
      },
      {
        "number": "12",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C open-drain data I/O. Connect to data line from host controller or smart battery. Connect a 10-kΩ pullup resistor per I2C specifications."
      },
      {
        "number": "13",
        "name": "SCL",
        "type": "input",
        "description": "I2C clock input. Connect to clock line from host controller or smart battery. Connect a 10-kΩ pullup resistor per I2C specifications."
      },
      {
        "number": "14",
        "name": "CMPIN",
        "type": "input",
        "description": "Input of independent comparator; compares voltage sensed on CMPIN to an internal reference. Polarity, output polarity and deglitch time selectable via I2C. With polarity HIGH (REG0x30[6]=1) place resistor between CMPIN and CMPOUT for hysteresis programming; with polarity LOW internal hysteresis is 100 mV. Tie to ground if unused."
      },
      {
        "number": "15",
        "name": "CMPOUT",
        "type": "output",
        "description": "Open-drain output of independent comparator. Place pullup resistor from CMPOUT to pullup supply rail. Internal reference, output polarity and deglitch time are selectable by I2C."
      },
      {
        "number": "16",
        "name": "COMP1",
        "type": "passive",
        "description": "Buck-boost converter compensation pin 1. Refer to bq25700 EVM schematic for COMP1 RC network."
      },
      {
        "number": "17",
        "name": "COMP2",
        "type": "passive",
        "description": "Buck-boost converter compensation pin 2. Refer to bq25700 EVM schematic for COMP2 RC network."
      },
      {
        "number": "18",
        "name": "CELL_BATPRESZ",
        "type": "input",
        "description": "Battery cell-count selection and battery-presence pin for 1- to 4-cell settings. Biased from VDDA. Also sets SYSOVP threshold (5 V for 1-cell, 12 V for 2-cell, 18.5 V for 3-cell). Pulled below V(CELL_BATPRESZ_FALL) indicates battery removal; the device exits LEARN mode and disables charge."
      },
      {
        "number": "19",
        "name": "SRN",
        "type": "input",
        "description": "Charge current sense resistor negative input. Also used for battery voltage sensing. Connect optional 0.1-µF ceramic capacitor to GND for common-mode filtering; connect 0.1-µF between SRP and SRN for differential-mode filtering. 10-Ω series resistors are placed on SRP/SRN for reverse-battery protection."
      },
      {
        "number": "20",
        "name": "SRP",
        "type": "input",
        "description": "Charge current sense resistor positive input. Connect 0.1-µF ceramic capacitor from SRP to SRN for differential-mode filtering. Optional 0.1-µF to GND for common-mode filtering. 10-Ω series resistors for reverse-battery protection."
      },
      {
        "number": "21",
        "name": "BATDRV",
        "type": "output",
        "description": "P-channel battery FET (BATFET) gate driver output. Shorted to VSYS to turn OFF BATFET; 10 V below VSYS to fully turn ON BATFET. In linear mode regulates VSYS at minimum system voltage when battery is depleted. Fully ON during fast charge and supplement mode."
      },
      {
        "number": "22",
        "name": "VSYS",
        "type": "power_in",
        "description": "Charger system voltage sensing. The system voltage regulation limit is programmed in REG0x05/04() and REG0x0D/0C()."
      },
      {
        "number": "23",
        "name": "SW2",
        "type": "power_in",
        "description": "Boost mode high-side power MOSFET driver source. Connect to the source of the high-side n-channel MOSFET (Q4)."
      },
      {
        "number": "24",
        "name": "HIDRV2",
        "type": "output",
        "description": "Boost mode high-side power MOSFET (Q4) driver. Connect to high-side n-channel MOSFET gate."
      },
      {
        "number": "25",
        "name": "BTST2",
        "type": "power_in",
        "description": "Boost mode high-side power MOSFET driver power supply. Connect a 0.047-µF capacitor between SW2 and BTST2. Bootstrap diode between REGN and BTST2 is integrated."
      },
      {
        "number": "26",
        "name": "LODRV2",
        "type": "output",
        "description": "Boost mode low-side power MOSFET (Q3) driver. Connect to low-side n-channel MOSFET gate."
      },
      {
        "number": "27",
        "name": "PGND",
        "type": "power_in",
        "description": "Device power ground."
      },
      {
        "number": "28",
        "name": "REGN",
        "type": "power_out",
        "description": "6-V linear regulator output supplied from VBUS or VSYS. LDO is active when VBUS is above V(VBUS_CONVEN). Connect a 2.2- or 3.3-µF ceramic capacitor from REGN to power ground. REGN output is for the power-stage gate drive."
      },
      {
        "number": "29",
        "name": "LODRV1",
        "type": "output",
        "description": "Buck mode low-side power MOSFET (Q2) driver. Connect to low-side n-channel MOSFET gate."
      },
      {
        "number": "30",
        "name": "BTST1",
        "type": "power_in",
        "description": "Buck mode high-side power MOSFET driver power supply. Connect a 0.047-µF capacitor between SW1 and BTST1. Bootstrap diode between REGN and BTST1 is integrated."
      },
      {
        "number": "31",
        "name": "HIDRV1",
        "type": "output",
        "description": "Buck mode high-side power MOSFET (Q1) driver. Connect to high-side n-channel MOSFET gate."
      },
      {
        "number": "32",
        "name": "SW1",
        "type": "power_in",
        "description": "Buck mode high-side power MOSFET driver source. Connect to the source of the high-side n-channel MOSFET (Q1)."
      },
      {
        "number": "33",
        "name": "PAD",
        "type": "power_in",
        "description": "Exposed thermal pad beneath the IC. Analog ground and power ground star-connected near the IC's ground. Always solder to board with vias to power-ground planes for both grounding and thermal dissipation."
      }
    ],
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        "described": 33,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-32-EP(4x4)",
      "Category": "PMIC",
      "Pins": "33"
    }
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