component
A5947KLPTR-B-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Brushless DC (BLDC) Motor Driver, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "a5947klptr-b-t",
"title": "A5947KLPTR-B-T",
"brief": "Allegro MicroSystems, LLC Brushless DC (BLDC) Motor Driver, TSSOP-20-EP. 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",
"a5947klptr-b-t",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "A5947KLPTR-B-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "TSSOP-20-EP",
"pin_count": 21,
"category": "Motor Driver ICs",
"subcategory": "Brushless DC (BLDC) Motor Driver",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8b9659ad036389524ecc6c6fe7ae9ac7.pdf",
"parts": {
"symbol": "a5947klptr-b-t.kicad_sym",
"footprint": "a5947klptr-b-t.kicad_mod",
"model_3d": "a5947klptr-b-t-hero.glb",
"model_3d_plain": "a5947klptr-b-t-etched.glb",
"model_3d_step": "a5947klptr-b-t-etched.step",
"model_3d_step_plain": "a5947klptr-b-t.step",
"lbr": "a5947klptr-b-t.lbr"
},
"distributor_links": {
"lcsc": "C19761970",
"digikey": "620-A5947KLPTR-B-T-ND",
"mouser": "250-A5947KLPTR-B-T"
},
"distributor_check": {
"checked_at": "2026-10-26T19:37:12Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "620-A5947KLPTR-B-T-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "250-A5947KLPTR-B-T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "2",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "3",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "4",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor connection (CP1 rated -0.3 to VBB + 0.3 V)."
},
{
"number": "5",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor connection (CP2 rated VBB - 0.3 to VCP + 0.3 V)."
},
{
"number": "6",
"name": "VCP",
"type": "passive",
"description": "Charge pump capacitor/output pin, rated VBB - 0.3 to VBB + 8 V, typically 7.2 V above VBB at VBB = 8 V."
},
{
"number": "7",
"name": "VBB",
"type": "power_in",
"description": "Input supply, operating 4 to 40 V (absolute maximum -0.7 to 40 V)."
},
{
"number": "8",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "9",
"name": "OUTA",
"type": "output",
"description": "Motor terminal A, absolute maximum VBB + 1 V, output current up to 3.6 A."
},
{
"number": "10",
"name": "LSS",
"type": "passive",
"description": "Low side source connection of the power drivers."
},
{
"number": "11",
"name": "OUTB",
"type": "output",
"description": "Motor terminal B, absolute maximum VBB + 1 V, output current up to 3.6 A."
},
{
"number": "12",
"name": "OUTC",
"type": "output",
"description": "Motor terminal C, absolute maximum VBB + 1 V, output current up to 3.6 A."
},
{
"number": "13",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "14",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "15",
"name": "VREF",
"type": "power_out",
"description": "Reference voltage output, 3.3 V typ (3.15 to 3.45 V) for 0 to 20 mA load."
},
{
"number": "16",
"name": "n/c",
"type": "unconnected",
"description": "No connect."
},
{
"number": "17",
"name": "TEST",
"type": "output",
"description": "Open-drain logic output, low when motor off and high at end of open loop startup, rated -0.3 to 6 V."
},
{
"number": "18",
"name": "nFAULT",
"type": "output",
"description": "Active-low output indicating VBB undervoltage, VBB overvoltage, thermal shutdown, VCP undervoltage, rotor lock and output VDS (OCP) faults."
},
{
"number": "19",
"name": "SPD",
"type": "input",
"description": "Speed demand input by PWM duty or analog voltage (0 to 6 V abs max, 9-bit ADC), also serves as I2C clock SCL."
},
{
"number": "20",
"name": "FG",
"type": "bidirectional",
"description": "Open-drain speed output representing motor speed, also serves as I2C data line SDA."
},
{
"number": "21",
"name": "PAD",
"type": "passive",
"description": "Exposed pad for enhanced thermal dissipation."
}
],
"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: Exposed pad has no pin number in the datasheet (listed as '–' PAD); numbered '21' here as a placehol; Pin types for CP1, CP2, VCP, LSS and the open-drain outputs are inferred from function descriptions;",
"2/21 pins cited to the wrong page (name found elsewhere): ['17:TEST@p7', '21:PAD@p3']"
],
"pages_sent": 21,
"cost_usd": 0.1656,
"at": "2026-10-26T19:36:53"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/8b9659ad036389524ecc6c6fe7ae9ac7.pdf",
"pages": 21,
"sha256": "f431be2f67e7d90a",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "a5947klptr-b-t.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.41,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "cd32e235afcee29d73f6747f5bbef996e855e78b32215e479c121b54654a092e",
"checked": "2026-10-26",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "a5947klptr-b-t-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.41,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "1e172fc8af88cd6cddeb2b8d38b5a5037ee54a92c835d9f3755e9098050426e3",
"checked": "2026-10-26",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Allegro MicroSystems, LLC",
"Package": "TSSOP-20-EP",
"Category": "Motor Driver ICs",
"Pins": "21"
},
"appearance": {
"contacts": {
"quote": "Package Thermal Resistance RθJA 20-lead TSSOP (package LP), on 2-sided PCB 1-in.2 copper 34 °C/W",
"page": 2,
"doc": "ds.pdf",
"material": "copper"
},
"version": 1,
"datasheet_sha256": "f431be2f67e7d90aefb536e9cc1be7a17a1885ab57b207ef449854d75dee7cc0"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "f431be2f67e7d90aefb536e9cc1be7a17a1885ab57b207ef449854d75dee7cc0",
"rows": [
{
"name": "VBB Supply Current, active",
"symbol": "IBB",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 13.5,
"max": 15,
"conditions": "Active mode (PWM duty < DC_ON)",
"source_page": 4,
"source": "datasheet"
},
{
"name": "VBB Supply Current, standby",
"symbol": "IBBS",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 10,
"max": 40,
"conditions": "VBB = 34 V, standby mode",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Reference Voltage",
"symbol": "VREF",
"kind": "electrical",
"unit": "V",
"min": 3.15,
"typ": 3.3,
"max": 3.45,
"conditions": "I = 0 to 20 mA, VBB = 6 to 40 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Charge Pump VCP",
"symbol": "VCP",
"kind": "electrical",
"unit": "V",
"min": 6.5,
"typ": 7.2,
"max": 7.7,
"conditions": "Relative to VBB, VBB = 8 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Charge Pump VCP",
"symbol": "VCP",
"kind": "electrical",
"unit": "V",
"min": 3.5,
"typ": 3.7,
"max": null,
"conditions": "Relative to VBB, VBB = 4 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Total Driver On-Resistance",
"symbol": "RDS(ON)",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 760,
"max": 860,
"conditions": "I = 1.5 A, TJ = 125°C, VBB = 12 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Total Driver On-Resistance",
"symbol": "RDS(ON)",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 950,
"max": 1200,
"conditions": "I = 1.5 A, TJ = 125°C, VBB = 4 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Total Driver On-Resistance",
"symbol": "RDS(ON)",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 510,
"max": null,
"conditions": "I = 1.5 A, TJ = 25°C, VBB = 12 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Total Driver On-Resistance",
"symbol": "RDS(ON)",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 680,
"max": null,
"conditions": "I = 1.5 A, TJ = 25°C, VBB = 4 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Source Driver On-Resistance",
"symbol": "RDS(ON)SRC",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 380,
"max": null,
"conditions": "TJ = 125°C, VBB = 12 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Sink Driver On-Resistance",
"symbol": "RDS(ON)SNK",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 380,
"max": null,
"conditions": "TJ = 125°C, VBB = 12 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Motor PWM Frequency",
"symbol": "fPWM",
"kind": "electrical",
"unit": "kHz",
"min": 23.52,
"typ": 24.5,
"max": 25.48,
"conditions": "TA = 25°C to 125°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Motor PWM Frequency",
"symbol": "fPWM",
"kind": "electrical",
"unit": "kHz",
"min": 23.03,
"typ": null,
"max": 25.97,
"conditions": "TA = –40°C to 125°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "PWM Input Frequency Range",
"symbol": "fPWMIN",
"kind": "electrical",
"unit": "Hz",
"min": 34,
"typ": null,
"max": 65000,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Duty Cycle On Threshold",
"symbol": "DCON",
"kind": "electrical",
"unit": "%",
"min": -0.5,
"typ": null,
"max": 0.5,
"conditions": "Relative to target",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Duty Cycle Off Threshold",
"symbol": "DCOFF",
"kind": "electrical",
"unit": "%",
"min": -0.5,
"typ": null,
"max": 0.5,
"conditions": "Relative to target",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD Standby Threshold (Analog)",
"symbol": "VSPDTH",
"kind": "electrical",
"unit": "V",
"min": 0.43,
"typ": 0.7,
"max": 1,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD On Threshold",
"symbol": "VSPDON",
"kind": "electrical",
"unit": "mV",
"min": 210,
"typ": 240,
"max": 270,
"conditions": "DCON = 10%",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD Off Threshold",
"symbol": "VSPDOFF",
"kind": "electrical",
"unit": "mV",
"min": 160,
"typ": 190,
"max": 220,
"conditions": "DCOFF = 8%",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD ADC Accuracy",
"symbol": "SPDACC",
"kind": "electrical",
"unit": "LSB",
"min": -10,
"typ": null,
"max": 10,
"conditions": "VBB = 12 V, VSPD = 0.2 V to VSPDMAX",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Speed Setpoint",
"symbol": "fSPD",
"kind": "electrical",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "Duty cycle input; TA = 25°C to 125°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Speed Setpoint",
"symbol": "fSPD",
"kind": "electrical",
"unit": "%",
"min": -7,
"typ": null,
"max": 7,
"conditions": "Duty cycle input; TA = –40°C to 125°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD Max",
"symbol": "VSPDMAX",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 2.49,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SPD ADC Resolution",
"symbol": "VSPDLSB",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 4.892,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Lock Timing",
"symbol": "tLOCK",
"kind": "electrical",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "Relative to target",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Undervoltage Threshold",
"symbol": "VBBUVLO",
"kind": "electrical",
"unit": "V",
"min": 3.7,
"typ": 3.85,
"max": 4,
"conditions": "UVLO = 0, VBB rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Undervoltage Threshold",
"symbol": "VBBUVLO",
"kind": "electrical",
"unit": "V",
"min": 8.4,
"typ": 8.65,
"max": 9.02,
"conditions": "UVLO = 1, VBB rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Undervoltage Hysteresis",
"symbol": "VBBHYS",
"kind": "electrical",
"unit": "mV",
"min": 160,
"typ": 300,
"max": 480,
"conditions": "UVLO = 0",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Undervoltage Hysteresis",
"symbol": "VBBHYS",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": 2,
"max": 2.2,
"conditions": "UVLO = 1",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Overcurrent Limit",
"symbol": "IOCL",
"kind": "electrical",
"unit": "A",
"min": 2.5,
"typ": 3,
"max": 3.5,
"conditions": "VBB = 8 V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Overcurrent Protection",
"symbol": "IOCP",
"kind": "electrical",
"unit": "A",
"min": 3.94,
"typ": 7,
"max": null,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Overvoltage",
"symbol": "VBBOV",
"kind": "electrical",
"unit": "V",
"min": 18.2,
"typ": 19,
"max": 19.8,
"conditions": "VBBOV = 0, VBB rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Overvoltage",
"symbol": "VBBOV",
"kind": "electrical",
"unit": "V",
"min": 36.8,
"typ": 37.5,
"max": 39.3,
"conditions": "VBBOV = 1, VBB rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VBB Overvoltage Hysteresis",
"symbol": "VBBOVHYS",
"kind": "electrical",
"unit": "V",
"min": 1.5,
"typ": 2,
"max": 2.5,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VREF UVLO",
"symbol": "VREFUVLO",
"kind": "electrical",
"unit": "V",
"min": 2.9,
"typ": 3,
"max": 3.15,
"conditions": "VREF rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VREF UVLO Hysteresis",
"symbol": "VREFHYS",
"kind": "electrical",
"unit": "mV",
"min": 150,
"typ": 250,
"max": 350,
"conditions": "",
"source_page": 5,
"source": "datasheet"
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