BQ25887RGER

{
  "slug": "bq25887rger",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Battery Management ICs, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "bq25887rger",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bq25887rger.kicad_sym",
    "bq25887rger.kicad_mod",
    "bq25887rger.glb",
    "bq25887rger.step",
    "bq25887rger.lbr",
    "docs/hero.png",
    "docs/bq25887rger-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bq25887rger-hero.glb",
    "bq25887rger-hero.overlay.json",
    "bq25887rger-etched.glb"
  ],
  "component": {
    "mpn": "BQ25887RGER",
    "manufacturer": "Texas Instruments",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Power Supply Chip",
    "subcategory": "Battery Management ICs",
    "datasheet": "https://www.ti.com/cn/lit/gpn/bq25887",
    "parts": {
      "symbol": "bq25887rger.kicad_sym",
      "footprint": "bq25887rger.kicad_mod",
      "model_3d": "bq25887rger-hero.glb",
      "model_3d_plain": "bq25887rger-etched.glb",
      "model_3d_step": "bq25887rger-etched.step",
      "model_3d_step_plain": "bq25887rger.step",
      "lbr": "bq25887rger.lbr"
    },
    "distributor_links": {
      "lcsc": "C2761614"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:04:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PG",
        "type": "output",
        "description": "Open-drain active-low power good indicator, connect to pull-up rail via 10-kΩ resistor; LOW indicates a good input source within VVBUS_OP that can provide more than IPOORSRC (30 mA)."
      },
      {
        "number": "2",
        "name": "STAT",
        "type": "output",
        "description": "Open-drain charge status indicator, connect to pull-up rail via 10-kΩ resistor; LOW means charge in progress, HIGH means charge complete or disabled, blinks at 1 Hz on any fault, and can be disabled with the STAT_DIS bit."
      },
      {
        "number": "3",
        "name": "CD",
        "type": "input",
        "description": "Active-high chip disable pin; pulling it high disables charge and places the device in HIZ mode (ADC and I2C still allowed), internally pulled low with a 900-kΩ resistor."
      },
      {
        "number": "4",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C interface data, connect to the pull-up rail through a 10-kΩ resistor."
      },
      {
        "number": "5",
        "name": "SCL",
        "type": "input",
        "description": "I2C interface clock, connect to the pull-up rail through a 10-kΩ resistor."
      },
      {
        "number": "6",
        "name": "INT",
        "type": "output",
        "description": "Open-drain active-low interrupt output, connect to pull-up rail via a 10-kΩ resistor; sends a 256-µs pulse to the host to report charger status and faults."
      },
      {
        "number": "7",
        "name": "TS",
        "type": "input",
        "description": "Temperature qualification voltage input for a negative temperature coefficient thermistor (103AT-2 recommended), with the window programmed by a resistor divider from REGN to TS to GND; charge suspends when out of range."
      },
      {
        "number": "8",
        "name": "ILIM",
        "type": "input",
        "description": "Input current limit pin regulated at 0.8 V, where a resistor to ground sets IINMAX = KILIM/RILIM (limits below 500 mA not supported) and the pin can monitor input current; pull to GND if unused and do not float."
      },
      {
        "number": "9",
        "name": "MID",
        "type": "input",
        "description": "Voltage input for the midpoint between cells in 2S1P configuration, used for cell balancing and VMID ADC measurement; a 300-ohm series resistor to the cell midpoint is recommended for bottom-cell reverse-plug protection."
      },
      {
        "number": "10",
        "name": "CBSET",
        "type": "power_in",
        "description": "Cell balancing power pin, connected to the midpoint between the two batteries through a current-limit resistor that sets the balancing current, which should not exceed 400 mA."
      },
      {
        "number": "11",
        "name": "REGN",
        "type": "power_out",
        "description": "Gate drive supply and bias for the internal MOSFET drivers and IC, bypass to GND with a 4.7-µF ceramic capacitor; REGN current limit is 50 mA."
      },
      {
        "number": "12",
        "name": "BTST",
        "type": "passive",
        "description": "PWM high-side driver supply connected internally to the bootstrap diode cathode; connect a 47-nF bootstrap capacitor from SW to BTST."
      },
      {
        "number": "13",
        "name": "BAT",
        "type": "passive",
        "description": "Battery power connection; connect at least 10 µF of capacitance after derating close to the BAT pin and GND."
      },
      {
        "number": "14",
        "name": "BAT",
        "type": "passive",
        "description": "Battery power connection; connect at least 10 µF of capacitance after derating close to the BAT pin and GND."
      },
      {
        "number": "15",
        "name": "SNS",
        "type": "output",
        "description": "Sense output for charge current sensing; place a 44-µF ceramic capacitor on this pin for stability."
      },
      {
        "number": "16",
        "name": "SNS",
        "type": "output",
        "description": "Sense output for charge current sensing; place a 44-µF ceramic capacitor on this pin for stability."
      },
      {
        "number": "17",
        "name": "SW",
        "type": "passive",
        "description": "Inductor connection to the switched side of the external inductor."
      },
      {
        "number": "18",
        "name": "SW",
        "type": "passive",
        "description": "Inductor connection to the switched side of the external inductor."
      },
      {
        "number": "19",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return."
      },
      {
        "number": "20",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return."
      },
      {
        "number": "21",
        "name": "PMID",
        "type": "passive",
        "description": "Blocking MOSFET connection; minimum total low-ESR capacitance on VBUS and PMID after derating is 10 µF, with at least 1 µF at VBUS and the remainder at PMID."
      },
      {
        "number": "22",
        "name": "PMID",
        "type": "passive",
        "description": "Blocking MOSFET connection; minimum total low-ESR capacitance on VBUS and PMID after derating is 10 µF, with at least 1 µF at VBUS and the remainder at PMID."
      },
      {
        "number": "23",
        "name": "VBUS",
        "type": "power_in",
        "description": "Input supply connected to the external DC supply; bypass to GND with at least 1-µF ceramic capacitor placed as close to the IC as possible."
      },
      {
        "number": "24",
        "name": "PSEL",
        "type": "input",
        "description": "Power source selection input; HIGH indicates USB host source (500 mA) and LOW indicates adapter source (3.0 A)."
      },
      {
        "number": "25",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin table does not list the exposed thermal pad (the package hint says EP), so no pad pin was ad; The datasheet gives only I/O classes (P, AO, DO, DI, AI) for these pins. The KiCad types for the pow"
        ],
        "pages_sent": 23,
        "cost_usd": 0.2272,
        "at": "2026-10-22T21:03:59"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/bq25887",
        "pages": 85,
        "sha256": "381299f22ca68e82",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bq25887rger.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bq25887rger-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1031232ecaacca370f6964c0d8a0772975989c9087ee659d47d7813042b0e516",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}