UCC28C43DR

{
 "schema": "adom.pads/1",
 "slug": "ucc28c43dr",
 "footprint": "SOIC-8_3.9x4.9mm_P1.27mm",
 "generated_from": {
  "footprint": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
  "pins": "page.json:component.pins",
  "overrides": null
 },
 "pin1": {
  "pad": "1",
  "at": [
   -2.475,
   -1.905
  ],
  "corner": "top-left",
  "source": "silk-marker",
  "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4"
 },
 "pad_count": 8,
 "symbol_pins": [
  "1",
  "2",
  "3",
  "4",
  "5",
  "6",
  "7",
  "8"
 ],
 "paste_apertures": 0,
 "issues": [],
 "pads": [
  {
   "pad": "1",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -2.475,
    -1.905
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "1",
   "name": "COMP",
   "type": "output",
   "description": "Error amplifier output used for loop compensation. Frequently used as a control port by driving via a secondary-side opto-isolator; the error amplifier is internally current limited so forcing COMP to GND commands zero duty cycle.",
   "is_pin1": true,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "2",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -2.475,
    -0.635
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "2",
   "name": "FB",
   "type": "input",
   "description": "Inverting input to the internal error amplifier used to control the power converter voltage-feedback loop for stability. The non-inverting input is internally trimmed to 2.5V ± 1%.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "3",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -2.475,
    0.635
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "3",
   "name": "CS",
   "type": "input",
   "description": "Primary-side current sense input (non-inverting input to the PWM comparator). Connect to the current-sense resistor; when this signal exceeds the scaled error-amplifier voltage the PWM terminates OUT conduction. A voltage ramp may be applied here for voltage-mode operation. COMP-to-CS offset ≈ 1.15V, max CS input signal ≈ 1V.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "4",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -2.475,
    1.905
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "4",
   "name": "RT/CT",
   "type": "bidirectional",
   "description": "Fixed-frequency oscillator timing node. Connect timing resistor R_RT from VREF to this pin and timing capacitor C_CT from this pin to GND to set switching frequency (fSW = fOSC for the C43). Peak-to-peak ramp ≈ 1.9V; internal discharge current ≈ 8.4mA (with R_RT = 10kΩ).",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "5",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    2.475,
    1.905
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "5",
   "name": "GND",
   "type": "power_in",
   "description": "Ground return pin for the output driver stage and the logic-level controller section. All voltages are referenced to this pin.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "6",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    2.475,
    0.635
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "6",
   "name": "OUT",
   "type": "output",
   "description": "High-current totem-pole gate-drive output intended to directly drive an external MOSFET gate. Rail-to-rail ±1A peak (source/sink), 25ns rise / 20ns fall into 1nF; runs at the oscillator frequency with up to ~100% duty cycle for the UCC28C43. OUT is actively held low when VDD is below the turn-on threshold.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "7",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    2.475,
    -0.635
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "7",
   "name": "VDD",
   "type": "power_in",
   "description": "Analog controller bias supply input (recommended operating range up to 18V, absolute max 20V). Requires a 0.1µF bypass to GND with minimal trace length and additional bulk capacitance ≥ 10× the external MOSFET gate capacitance. UVLO turn-on 8.4V / turn-off 7.6V (C43 variant); startup current 50µA typ, operating current 2.3mA typ.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "8",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    2.475,
    -1.905
   ],
   "rot": 0.0,
   "size": [
    1.95,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "8",
   "name": "VREF",
   "type": "power_out",
   "description": "5V ±1% precision reference output used to source oscillator timing current through R_RT and to power light external loads (up to 20mA source). Must be bypassed to GND with at least a 0.1µF ceramic located close to the pin for stability.",
   "is_pin1": false,
   "source": {
    "geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  }
 ]
}