A3930KJPTR-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "a3930kjptr-t",
  "title": "A3930KJPTR-T",
  "brief": "Allegro MicroSystems LLC Brushless DC (BLDC) Motor Driver, LQFP-48-EP(7x7). 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",
    "motor driver ics",
    "a3930kjptr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "A3930KJPTR-T",
    "manufacturer": "Allegro MicroSystems LLC",
    "package": "LQFP-48-EP(7x7)",
    "pin_count": 49,
    "category": "Motor Driver ICs",
    "subcategory": "Brushless DC (BLDC) Motor Driver",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885141339459584",
    "parts": {
      "symbol": "a3930kjptr-t.kicad_sym",
      "footprint": "a3930kjptr-t.kicad_mod",
      "model_3d": "a3930kjptr-t-etched.glb",
      "model_3d_plain": "a3930kjptr-t.glb",
      "model_3d_step": "a3930kjptr-t-etched.step",
      "model_3d_step_plain": "a3930kjptr-t.step",
      "lbr": "a3930kjptr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C459252"
    },
    "pins": [
      {
        "number": "1",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "2",
        "name": "RESET",
        "type": "input",
        "description": "Sleep mode control input; when low disables all circuits and draws ≤10 µA; input high threshold 2.2 V with 50 kΩ internal pull-down."
      },
      {
        "number": "3",
        "name": "V5BD",
        "type": "output",
        "description": "5V base drive output for external regulator transistor QV5; provides up to 2 mA drive current."
      },
      {
        "number": "4",
        "name": "V5",
        "type": "power_out",
        "description": "5V reference output (4.75 to 5.25 V); powers Hall pull-ups and logic; requires ≥200 nF decoupling to AGND."
      },
      {
        "number": "5",
        "name": "FF2",
        "type": "output",
        "description": "Open drain fault flag output (active low); asserts for short-to-ground, short-to-supply, shorted winding, and low load faults."
      },
      {
        "number": "6",
        "name": "FF1",
        "type": "output",
        "description": "Open drain fault flag output (active low); asserts for undervoltage, overtemperature, logic faults, and low load faults."
      },
      {
        "number": "7",
        "name": "TACHO",
        "type": "output",
        "description": "Tachometer output toggling at each motor commutation; VOH = V5 - 1 V typical, VOL ≤0.4 V."
      },
      {
        "number": "8",
        "name": "BRAKE",
        "type": "input",
        "description": "Active low brake input; shorts motor windings through low-side FETs when low; overridden by RESET or COAST."
      },
      {
        "number": "9",
        "name": "DIR",
        "type": "input",
        "description": "Direction control input (VIL ≤0.8 V, VIH ≥2 V); high for forward, low for reverse per Hall commutation sequence."
      },
      {
        "number": "10",
        "name": "H1",
        "type": "input",
        "description": "Hall sensor input with 100 kΩ pull-up to V5 and 500 mV hysteresis; 120° electrical spacing with internal filtering."
      },
      {
        "number": "11",
        "name": "H2",
        "type": "input",
        "description": "Hall sensor input with 100 kΩ pull-up to V5 and 500 mV hysteresis; 120° electrical spacing with internal filtering."
      },
      {
        "number": "12",
        "name": "H3",
        "type": "input",
        "description": "Hall sensor input with 100 kΩ pull-up to V5 and 500 mV hysteresis; 120° electrical spacing with internal filtering."
      },
      {
        "number": "13",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "14",
        "name": "PWM",
        "type": "input",
        "description": "External PWM control input; high enables drivers per Hall inputs, low disables for current recirculation."
      },
      {
        "number": "15",
        "name": "MODE",
        "type": "input",
        "description": "Decay mode input; high for slow decay (high-side off only), low for fast decay (both high and low-side off)."
      },
      {
        "number": "16",
        "name": "RC",
        "type": "input",
        "description": "Oscillator timing input; fOSC ≈1/(RT×CT + tBLANK + tDEAD) with RT=5 to 400 kΩ; pull to AGND to disable PWM."
      },
      {
        "number": "17",
        "name": "TEST",
        "type": "input",
        "description": "Production test pin for Allegro use only; must be connected to AGND during normal operation."
      },
      {
        "number": "18",
        "name": "RDEAD",
        "type": "input",
        "description": "Dead time resistor connection; RDEAD (10 to 100 kΩ optimal) sets cross-conduction protection delay tDEAD."
      },
      {
        "number": "19",
        "name": "CSOUT",
        "type": "output",
        "description": "Current sense amplifier output; VCSOUT ≈VOOS + 19×(CSP - CSN), output range 0.1 to V5 - 0.2 V, output impedance ~80 Ω."
      },
      {
        "number": "20",
        "name": "REF",
        "type": "input",
        "description": "Current limit reference input; clamped internally to 4 V; typical pull-up RREF = 20 to 200 kΩ to V5."
      },
      {
        "number": "21",
        "name": "CSN",
        "type": "input",
        "description": "Differential amplifier inverting input; connect to negative terminal of current sense resistor; input impedance ~4 kΩ."
      },
      {
        "number": "22",
        "name": "CSP",
        "type": "input",
        "description": "Differential amplifier non-inverting input; connect to positive terminal of current sense resistor; input impedance ~80 kΩ."
      },
      {
        "number": "23",
        "name": "VDSTH",
        "type": "input",
        "description": "Fault threshold voltage input (0.3 to 4 V range); sets drain-source voltage threshold for short-circuit detection."
      },
      {
        "number": "24",
        "name": "VDRAIN",
        "type": "input",
        "description": "High-impedance drain voltage sense input (7 to 45 V operating range); Kelvin connection to high-side FET drains."
      },
      {
        "number": "25",
        "name": "SC",
        "type": "passive",
        "description": "Phase C motor connection and bootstrap supply node; driven by external FETs; charges bootstrap capacitor CC when low."
      },
      {
        "number": "26",
        "name": "GHC",
        "type": "output",
        "description": "High-side gate driver output for phase C; driven from bootstrap capacitor CC; output on-resistance ~4 Ω typical."
      },
      {
        "number": "27",
        "name": "CC",
        "type": "passive",
        "description": "Bootstrap capacitor connection for phase C; charged to VREG (~13 V) when SC is low; supplies high-side gate drive."
      },
      {
        "number": "28",
        "name": "SB",
        "type": "passive",
        "description": "Phase B motor connection and bootstrap supply node; driven by external FETs; charges bootstrap capacitor CB when low."
      },
      {
        "number": "29",
        "name": "GHB",
        "type": "output",
        "description": "High-side gate driver output for phase B; driven from bootstrap capacitor CB; output on-resistance ~4 Ω typical."
      },
      {
        "number": "30",
        "name": "CB",
        "type": "passive",
        "description": "Bootstrap capacitor connection for phase B; charged to VREG (~13 V) when SB is low; supplies high-side gate drive."
      },
      {
        "number": "31",
        "name": "SA",
        "type": "passive",
        "description": "Phase A motor connection and bootstrap supply node; driven by external FETs; charges bootstrap capacitor CA when low."
      },
      {
        "number": "32",
        "name": "GHA",
        "type": "output",
        "description": "High-side gate driver output for phase A; driven from bootstrap capacitor CA; output on-resistance ~4 Ω typical."
      },
      {
        "number": "33",
        "name": "CA",
        "type": "passive",
        "description": "Bootstrap capacitor connection for phase A; charged to VREG (~13 V) when SA is low; supplies high-side gate drive."
      },
      {
        "number": "34",
        "name": "GLC",
        "type": "output",
        "description": "Low-side gate driver output for phase C; logic level output VOH = VREG - 0.2 V typical, VOL ≤0.4 V; pull-down impedance ~1.5 Ω."
      },
      {
        "number": "35",
        "name": "GLB",
        "type": "output",
        "description": "Low-side gate driver output for phase B; logic level output VOH = VREG - 0.2 V typical, VOL ≤0.4 V; pull-down impedance ~1.5 Ω."
      },
      {
        "number": "36",
        "name": "GLA",
        "type": "output",
        "description": "Low-side gate driver output for phase A; logic level output VOH = VREG - 0.2 V typical, VOL ≤0.4 V; pull-down impedance ~1.5 Ω."
      },
      {
        "number": "37",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "38",
        "name": "LSS",
        "type": "passive",
        "description": "Low-side source return connection; common source point for all low-side external FETs; gate discharge return path."
      },
      {
        "number": "39",
        "name": "ESF",
        "type": "input",
        "description": "Enable Stop on Fault (active high) logic input; when high, short-circuit faults disable all outputs and latch; when low, faults only flag via FF pins."
      },
      {
        "number": "40",
        "name": "VREG",
        "type": "power_out",
        "description": "Gate driver supply output from internal charge pump (~13 V nominal); supplies all gate drivers and bootstrap charging; requires ≥20 µF storage capacitor."
      },
      {
        "number": "41",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all logic, control, and power circuits; exposed thermal pad also connected; critical for timing and current sense accuracy."
      },
      {
        "number": "42",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump capacitor positive terminal; connect 470 nF ceramic capacitor between CP1 and CP2 to generate VREG."
      },
      {
        "number": "43",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump capacitor negative terminal; connect 470 nF ceramic capacitor between CP1 and CP2 to generate VREG."
      },
      {
        "number": "44",
        "name": "DIRO",
        "type": "output",
        "description": "Direction output indicating measured motor rotation direction; high for forward, low for reverse per commutation table; VOH = V5 - 1 V typical."
      },
      {
        "number": "45",
        "name": "VBB",
        "type": "power_in",
        "description": "Main power supply input; operating range 5.5 to 50 V (guaranteed function 7 to 45 V); quiescent current 11 to 14 mA; requires 100 nF + 10 µF parallel decoupling."
      },
      {
        "number": "46",
        "name": "COAST",
        "type": "input",
        "description": "Active low coast input; when low, disables all gate drive outputs (coasts motor) without disabling supplies or logic; functions as emergency stop."
      },
      {
        "number": "47",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "48",
        "name": "N.C.",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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": [
          "exposed pad 49 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 21,
        "cost_usd": 0.5919,
        "at": "2026-09-21T16:40:13"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885141339459584",
        "pages": 21,
        "sha256": "468cfb1c44c4baf5",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "f960910b71d80cee36ddda3bc3d76fc6db6e160cef6b65cca7a6d6ec3727584e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "a3930kjptr-t-etched.step",
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        "sha256": "89038f73af851ba4d8dd1a6661bdb376d0c77d41e0d81e8b9a0bb330ac00fd00",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems LLC",
      "Package": "LQFP-48-EP(7x7)",
      "Category": "Motor Driver ICs",
      "Pins": "49"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
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    "breadcrumbs",
    "info"
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  "discovery_triggers": [
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  "discovery_pitch": "A3930KJPTR-T (Allegro MicroSystems LLC) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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  "updated_at": "2026-09-24T15:27:19.408Z"
}