TL3844BDR

{
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  "type": "component",
  "slug": "tl3844bdr",
  "title": "TL3844BDR",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "tl3844bdr"
  ],
  "component": {
    "mpn": "TL3844BDR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-14",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tl3844b.pdf",
    "parts": {
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      "footprint": "tl3844bdr.kicad_mod",
      "model_3d": "tl3844bdr-etched.glb",
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      "lbr": "tl3844bdr.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier compensation pin. Provides access to the error amplifier output for loop compensation networks between COMP and VFB. Typical high-level output ≥5 V, low-level ≤1.1 V; source ≈0.5 mA, sink ≈2 mA."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input (voltage feedback). Regulated to the internal reference divided down to ~2.5 V. Input bias current ≈ -0.3 µA typ."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current-sense comparator input. Trips the PWM latch at ~1.0 V typ (0.9-1.1 V), providing cycle-by-cycle peak current limiting. Input range 0 V to 5.5 V; propagation delay to output ≈150 ns typ."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Oscillator RC input. External timing resistor to VREF and timing capacitor to GND set the oscillator frequency (up to 500 kHz recommended). Trimmed internal discharge current ≈8.3 mA typ; output frequency is one-half the oscillator frequency on the TL3844B (internal toggle flip-flop)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Device power supply ground (analog/signal and PWM return). All device voltages are referenced to this terminal. On the 8-pin package, output ground and signal ground share this pin."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Totem-pole PWM output for driving an N-channel power MOSFET gate. Delivers high peak current with rise/fall times ≈25 ns typ (150 ns max) into 1 nF; average output current up to 200 mA. VOH ≈13.5 V @ IOH = -20 mA; VOL ≈0.1 V @ IOL = 20 mA. Held low in UVLO (VOL ≤1.2 V while sinking 10 mA)."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Device positive supply. UVLO start threshold ≈16 V (14.5-17.5 V), stop threshold ≈10 V (8.5-11.5 V). Absolute maximum 30 V (low-impedance source) or self-limiting for ICC < 30 mA; start-up current <0.5 mA, operating current ≈11 mA typ (17 mA max)."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "Internally trimmed 5 V reference output (5.0 V ±0.1 V at TJ = 25 °C, IO = 1 mA). Sources up to 20 mA (short-circuit current -100 mA typ) for external bias including the RT/CT timing resistor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tl3844b.pdf",
        "pages": 31,
        "sha256": "42e42dc7a6e780d9",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tl3844bdr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          8.7,
          1.75
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        "zmin_mm": -0.0,
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        "checked": "2026-10-07",
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "e02d4a8c675c4faf290735c8167a099615ddeaa2c6ae9cfa95ce745d9dc4ebf1",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-14",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [
    {
      "mpn": "TL3844BDRD",
      "kind": "packaging"
    },
    {
      "mpn": "TL3844BDR",
      "kind": "packaging"
    },
    {
      "mpn": "TL3844BDRIDR",
      "kind": "packaging"
    },
    {
      "mpn": "TL3844BDRIDGSR",
      "kind": "packaging"
    },
    {
      "mpn": "TL3844BDRP",
      "kind": "packaging"
    },
    {
      "mpn": "TL3844BDRD (14)",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "TL3844BDR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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  "updated_at": "2026-09-25T09:53:11.689Z"
}