bq24103arhlr

{
  "slug": "bq24103arhlr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Battery Management, QFN-20-EP(3.7x4.7). Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "pmic",
    "bq24103arhlr"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bq24103arhlr.kicad_sym",
    "bq24103arhlr.kicad_mod",
    "bq24103arhlr.glb",
    "bq24103arhlr.step",
    "bq24103arhlr.lbr",
    "docs/hero.png",
    "docs/bq24103arhlr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bq24103arhlr-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "component": {
    "mpn": "BQ24103ARHLR",
    "manufacturer": "Texas Instruments",
    "package": "QFN-20-EP(3.7x4.7)",
    "pin_count": 21,
    "category": "Battery Management",
    "datasheet": "https://www.ti.com/lit/ds/symlink/bq24103arhlr.pdf",
    "parts": {
      "symbol": "bq24103arhlr.kicad_sym",
      "footprint": "bq24103arhlr.kicad_mod",
      "model_3d": "bq24103arhlr-etched.glb",
      "model_3d_plain": "bq24103arhlr.glb",
      "model_3d_step": "bq24103arhlr-etched.step",
      "model_3d_step_plain": "bq24103arhlr.step",
      "lbr": "bq24103arhlr.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "power_out",
        "description": "Charge current output / inductor connection (paired with pin 20). Connect the switching inductor here; add an external Zener/TVS (e.g. MMBZ18VALT1) to PGND to clamp voltage spikes and protect the integrated power MOSFETs during abnormal conditions."
      },
      {
        "number": "2",
        "name": "STAT1",
        "type": "output",
        "description": "Charge status 1, open-drain output (10 mA max sink). Turns on to indicate charge-in-progress. Combined with STAT2 it encodes charger state (see Table 1). Typically drives a status LED with a 1.5 kΩ pull-up."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Charger input voltage (paired with pin 4). Connect adapter/DC input here; 20 V absolute-max, 4.35 V to 16 V recommended operating range. Both IN pins must be tied together and to VCC through the input filter."
      },
      {
        "number": "4",
        "name": "IN",
        "type": "power_in",
        "description": "Charger input voltage (paired with pin 3). Both IN pins are internally connected; tie together to the adapter rail with input bulk/bypass capacitance."
      },
      {
        "number": "5",
        "name": "PG",
        "type": "output",
        "description": "Power-good status, open-drain output (10 mA max sink). Pulls low when a valid VCC is detected; released (high-Z) in sleep mode. Can drive an LED or a host processor input via a pull-up (typ. 1.5 kΩ to VTSB or a logic rail)."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Analog device supply input. Tie to IN through the input filter; requires a 0.1 µF bypass capacitor to VSS. 4.35 V to 16 V recommended, 20 V absolute-max."
      },
      {
        "number": "7",
        "name": "TTC",
        "type": "input",
        "description": "Timer and termination control. Connect a capacitor from this pin to GND to set the safety-timer period. Driving this pin low disables the safety timer and charge-termination detection. 7 V absolute-max input rating."
      },
      {
        "number": "8",
        "name": "ISET1",
        "type": "bidirectional",
        "description": "Fast-charge current set point. Connect a resistor from this pin to GND to program the fast-charge current; IREG ≈ (V(ISET1)/R(ISET1)) × K. 3.3 V absolute-max input rating."
      },
      {
        "number": "9",
        "name": "ISET2",
        "type": "bidirectional",
        "description": "Precharge and termination current set point. Set by a resistor to ground. A low-level CMODE signal (system-controlled variants) selects ISET2 rate; when the battery reaches the regulation set point the part switches to voltage regulation regardless of CMODE. 3.3 V absolute-max input rating."
      },
      {
        "number": "10",
        "name": "VSS",
        "type": "power_in",
        "description": "Analog ground. Must be connected to ground at all times. The exposed thermal pad is internally connected to VSS."
      },
      {
        "number": "11",
        "name": "VTSB",
        "type": "power_out",
        "description": "TS internal bias-regulator output. Connect a 0.1 µF to 1 µF ceramic capacitor from this pin to VSS. Used to power the NTC thermistor divider on the TS pin (and optionally the STAT/PG LED pull-ups). 3.6 V absolute-max."
      },
      {
        "number": "12",
        "name": "TS",
        "type": "input",
        "description": "Battery-temperature sense input. Its voltage is compared against internal thresholds to gate charging. Drive with an NTC thermistor (e.g. 103AT) plus a voltage divider powered from VTSB (see Figure 10). 7 V absolute-max input rating."
      },
      {
        "number": "13",
        "name": "CELLS",
        "type": "input",
        "description": "Cell-count select (available on fixed-output variants including bq24103A). Ground or float this pin for single-cell (4.2 V) operation; pull up to VCC through a resistor for two-cell (8.4 V) operation. 20 V absolute-max input rating."
      },
      {
        "number": "14",
        "name": "BAT",
        "type": "input",
        "description": "Battery-voltage sense input. Connect directly to the battery-pack positive terminal (after the sense resistor). Bypass with a 0.1 µF capacitor to PGND if the leads to the battery are long/inductive. 20 V absolute-max."
      },
      {
        "number": "15",
        "name": "SNS",
        "type": "input",
        "description": "Charge current-sense input. Battery current is sensed via the voltage drop across an external sense resistor (typ. 0.1 Ω) in series with the battery pack between SNS and BAT. Requires a 0.1 µF capacitor to PGND.|V(SNS)-V(BAT)|≤ 1 V."
      },
      {
        "number": "16",
        "name": "CE",
        "type": "input",
        "description": "Charger enable input, active-low. Drive high to suspend charging and place the device in low-power sleep mode; drive low (or leave low) to enable charging. Do NOT pull up this input to VTSB. 20 V absolute-max input rating."
      },
      {
        "number": "17",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the integrated power FETs (paired with pin 18). Route with heavy copper to the input/output capacitor ground; may share a plane with VSS."
      },
      {
        "number": "18",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the integrated power FETs (paired with pin 17). Tie both PGND pins together on the board."
      },
      {
        "number": "19",
        "name": "STAT2",
        "type": "output",
        "description": "Charge status 2, open-drain output (10 mA max sink). Turns on to indicate charge-done; combined with STAT1 encodes charger state (see Table 1). Typically drives a status LED via a 1.5 kΩ pull-up."
      },
      {
        "number": "20",
        "name": "OUT",
        "type": "power_out",
        "description": "Charge current output / inductor connection (paired with pin 1). Both OUT pins are internally connected and must both be routed to the output inductor. -0.7 V to 20 V absolute-max."
      },
      {
        "number": "21",
        "name": "PAD",
        "type": "power_in",
        "description": "Exposed thermal pad on the underside of the RHL package. Internally connected to VSS; must be soldered to a copper pad at the same potential as VSS and stitched to the ground plane with a 2×3 via matrix for thermal performance. Can serve as the star ground between VSS and PGND."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C40964",
      "digikey": "296-22739-2-ND",
      "mouser": "595-BQ24103ARHLR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:54:37Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": "296-22739-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-BQ24103ARHLR",
        "status": "found"
      }
    },
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b7baaecccc8e434d25dca4018e56abf0d52bfa4ab833f927054939e1c879cf4e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "file": "bq24103arhlr-etched.step",
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        "checked": "2026-10-07",
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  }
}