component
A4955KLPTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Gate Drive ICs, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"version": "0.1.0",
"type": "component",
"description": "Allegro MicroSystems, LLC Gate Drive ICs, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
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"power management ics",
"a4955klptr-t",
"factory-2.0.0",
"extractor-text"
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"dependencies": {},
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"a4955klptr-t.step",
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"docs/hero.png",
"docs/a4955klptr-t-datasheet.pdf",
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"viewers/footprint.html",
"a4955klptr-t-hero.glb",
"a4955klptr-t-hero.overlay.json",
"a4955klptr-t-etched.glb"
],
"component": {
"mpn": "A4955KLPTR-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "HTSSOP-20-EP",
"pin_count": 21,
"category": "Power Management ICs",
"subcategory": "Gate Drive ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2df57e4eb9ecc0e57c0e5a9bebd95c11.pdf",
"parts": {
"symbol": "a4955klptr-t.kicad_sym",
"footprint": "a4955klptr-t.kicad_mod",
"model_3d": "a4955klptr-t-hero.glb",
"model_3d_plain": "a4955klptr-t-etched.glb",
"model_3d_step": "a4955klptr-t-etched.step",
"model_3d_step_plain": "a4955klptr-t.step",
"lbr": "a4955klptr-t.lbr"
},
"distributor_links": {
"lcsc": "C2688271",
"digikey": "620-1771-2-ND",
"mouser": "250-A4955KLPTR-T"
},
"distributor_check": {
"checked_at": "2026-10-30T18:43:01Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "620-1771-2-ND",
"status": "found",
"lifecycle": "Not For New Designs"
},
"mouser": {
"pn": "250-A4955KLPTR-T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "GND",
"type": "power_in",
"description": "Ground terminal for the device."
},
{
"number": "2",
"name": "AIOUT",
"type": "output",
"description": "Analog output proportional to VSENSE, with AIOUT/VSENSE gain of 9 to 11 V/V (10 typical) for VSENSE = 50 to 200 mV."
},
{
"number": "3",
"name": "OCLn",
"type": "output",
"description": "Overcurrent and overvoltage flag, open-drain output driven low during current limiting or a VDS fault, with output voltage of 0.3 V max at 2 mA when overcurrent is detected."
},
{
"number": "4",
"name": "VREF",
"type": "power_in",
"description": "Analog overcurrent-protection reference input with a range of 0 to 2.5 V."
},
{
"number": "5",
"name": "IN2",
"type": "input",
"description": "Digital logic input IN2 with VIH minimum 2.0 V, VIL maximum 0.8 V, and internal pull-down of 30 to 70 kΩ."
},
{
"number": "6",
"name": "IN1",
"type": "input",
"description": "Digital logic input IN1 with VIH minimum 2.0 V, VIL maximum 0.8 V, and internal pull-down of 30 to 70 kΩ."
},
{
"number": "7",
"name": "RC",
"type": "passive",
"description": "Terminal to set blank-time and off-time through a resistor and capacitor to ground, with RRC of 12 to 100 kΩ and CRC of 470 to 1500 pF."
},
{
"number": "8",
"name": "ISET",
"type": "passive",
"description": "Terminal to set gate drive current through a resistor to ground, which should be between 15 and 150 kΩ."
},
{
"number": "9",
"name": "SLEEPn",
"type": "input",
"description": "Active-low sleep input, with VIL(SLEEPn) maximum of 0.4 V; driving it low activates standby mode."
},
{
"number": "10",
"name": "SENSE",
"type": "passive",
"description": "Sense resistor connection and low-side gate return, with absolute maximum range of -0.5 to 0.5 V (-4 to 4 V for tW < 500 ns)."
},
{
"number": "11",
"name": "GLB",
"type": "output",
"description": "Low-side gate drive output for the B-side external MOSFET, with VGL of 6.5 to 7.5 V (6.8 V typical) at VBB = 8 to 50 V."
},
{
"number": "12",
"name": "GLA",
"type": "output",
"description": "Low-side gate drive output for the A-side external MOSFET, with VGL of 6.5 to 7.5 V (6.8 V typical) at VBB = 8 to 50 V."
},
{
"number": "13",
"name": "GHB",
"type": "output",
"description": "High-side gate drive output for the B-side external MOSFET, with VGH of 6.5 to 7.5 V relative to VBB at VBB = 8 to 50 V."
},
{
"number": "14",
"name": "SB",
"type": "passive",
"description": "High-side bridge reference for the B half-bridge; the absolute rating for VSx - VSENSE is -2 to 52 V."
},
{
"number": "15",
"name": "GHA",
"type": "output",
"description": "High-side gate drive output for the A-side external MOSFET, with VGH of 6.5 to 7.5 V relative to VBB at VBB = 8 to 50 V."
},
{
"number": "16",
"name": "SA",
"type": "passive",
"description": "High-side bridge reference for the A half-bridge; the absolute rating for VSx - VSENSE is -2 to 52 V."
},
{
"number": "17",
"name": "VCP",
"type": "power_out",
"description": "Charge pump reservoir capacitor connection, which is internally monitored, with outputs disabled on a VCP fault."
},
{
"number": "18",
"name": "CP2",
"type": "passive",
"description": "Charge pump terminal."
},
{
"number": "19",
"name": "VBB",
"type": "power_in",
"description": "Load supply voltage with absolute maximum of 50 V and UVLO enable threshold of 5.10 to 5.40 V (VBB rising)."
},
{
"number": "20",
"name": "CP1",
"type": "passive",
"description": "Charge pump terminal."
},
{
"number": "21",
"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-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Package mapping: the hint 'HTSSOP-20-EP' is not the datasheet's term. The MPN suffix LP is the 20-le; The exposed thermal pad (PAD) is listed in the terminal table with no pin number ('–'), so it is exc; Status: the A4955KLPTR-T is marked NOT FOR NEW DESIGN (page 2 footnote 1; production, samples no lon",
"exposed pad 21 added from the footprint"
],
"pages_sent": 11,
"cost_usd": 0.0621,
"at": "2026-10-30T18:42:43"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/2df57e4eb9ecc0e57c0e5a9bebd95c11.pdf",
"pages": 11,
"sha256": "6d475e85d5bccd9d",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"footprint": "viewers/footprint.html"
},
"models_3d": [
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"file": "a4955klptr-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": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "66d1aca7d20d3719375e8c9ad3cc7d683051069892f83de69ec29ddf9b78ee63",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.41,
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"zmin_mm": 0.0,
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"footprint_binding": "identity",
"sha256": "eff74c3dc5416fd4937e6238825f5b19d4cf67d2b98ca5c230c8d3d8a110a805",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "LP",
"source_page": 10,
"D": {
"nom_mm": 6.5,
"range_mm": [
null,
null
]
},
"E1": {
"nom_mm": 4.4,
"range_mm": [
null,
null
]
},
"E": {
"nom_mm": 6.4,
"range_mm": [
null,
null
]
},
"e": {
"nom_mm": 0.65,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 1.2,
"range_mm": [
null,
1.2
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "a4955klptr-t.step",
"verdict": "PASS",
"reasons": [
"height and body within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
}
}