component
UCC2818MDREP
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# UCC2818MDREP++**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16++UCC2818MDREP from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |+| 2 | PKLMT | input | PFC peak current limit threshold is 0 V, reached when the level-shifted input falls below 0 V; absolute maximum input is 5 V and the maximum negative voltage is -0.5 V. |+| 3 | CAOUT | output | Current amplifier output that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT. |+| 4 | CAI | input | Current amplifier noninverting input, connected through a resistor to the GND side of the current sense resistor; it remains functional down to and below GND. |+| 5 | MOUT | input | Multiplier output and current amplifier inverting input, high impedance, with multiplier output current limited to 2 × IIAC; absolute maximum input voltage is 8 V and maximum negative voltage is -0.5 V. |+| 6 | IAC | input | Input current proportional to instantaneous line voltage for the analog multiplier; recommended maximum IIAC is 500 µA and absolute maximum input current is 10 mA. |+| 7 | VAOUT | output | Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |+| 8 | VFF | passive | Feed-forward voltage generated by mirroring one half of IIAC into a single-pole external filter; it should be 1.4 V at low line. |+| 9 | VREF | power_out | Accurate 7.5-V voltage reference output capable of delivering 20 mA to peripheral circuitry, short-circuit current limited, and held at 0 V when VCC is below UVLO; bypass with 0.1 µF or larger ceramic capacitor. |+| 10 | OVP/EN | input | Over-voltage/enable window comparator input that disables the output driver above the programmed level and disables the driver and resets SS below 1.9 V (typ); absolute maximum voltage is 10 V. |+| 11 | VSENSE | input | Voltage amplifier inverting input, connected to the compensation network and to the boost output through a divider; absolute maximum input voltage is 10 V. |+| 12 | RT | passive | Oscillator charging current programming resistor to GND, with 10 kΩ to 100 kΩ recommended and nominal voltage on the pin of 3 V; absolute maximum input current is 10 mA. |+| 13 | SS | bidirectional | Soft-start pin that an external capacitor is charged through a current source, used as the voltage error signal during start-up, and discharged quickly when VCC drops out. |+| 14 | CT | passive | Oscillator timing capacitor to GND that sets the PWM oscillator frequency, with its lead to GND kept as short and direct as possible. |+| 15 | VCC | power_in | Positive supply, connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with absolute maximum supply voltage of 18 V; output devices are inhibited unless VCC exceeds the upper UVLO threshold. |+| 16 | DRVOUT | output | Totem-pole MOSFET gate driver output for the boost switch, which should use a series gate resistor; absolute maximum continuous gate drive current is 0.2 A. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Power Management (PMIC) |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `UCC2818MDREP`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `ucc2818mdrep-etched.step` / `ucc2818mdrep-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2818mdrep.step` / `ucc2818mdrep.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ucc2818-ep) (23 pp, sha256 `0b1b2e5d62669f10`, retrieved 2026-10-07, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ucc2818mdrep-datasheet.pdf)
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VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor."+ },+ {+ "number": "2",+ "name": "PKLMT",+ "type": "input",+ "description": "PFC peak current limit threshold is 0 V, reached when the level-shifted input falls below 0 V; absolute maximum input is 5 V and the maximum negative voltage is -0.5 V."+ },+ {+ "number": "3",+ "name": "CAOUT",+ "type": "output",+ "description": "Current amplifier output that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT."+ },+ {+ "number": "4",+ "name": "CAI",+ "type": "input",+ "description": "Current amplifier noninverting input, connected through a resistor to the GND side of the current sense resistor; it remains functional down to and below GND."+ },+ {+ "number": "5",+ "name": "MOUT",+ "type": "input",+ "description": "Multiplier output and current amplifier inverting input, high impedance, with multiplier output current limited to 2 × IIAC; absolute maximum input voltage is 8 V and maximum negative voltage is -0.5 V."+ },+ {+ "number": "6",+ "name": "IAC",+ "type": "input",+ "description": "Input current proportional to instantaneous line voltage for the analog multiplier; recommended maximum IIAC is 500 µA and absolute maximum input current is 10 mA."+ },+ {+ "number": "7",+ "name": "VAOUT",+ "type": "output",+ "description": "Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot."+ },+ {+ "number": "8",+ "name": "VFF",+ "type": "passive",+ "description": "Feed-forward voltage generated by mirroring one half of IIAC into a single-pole external filter; it should be 1.4 V at low line."+ },+ {+ "number": "9",+ "name": "VREF",+ "type": "power_out",+ "description": "Accurate 7.5-V voltage reference output capable of delivering 20 mA to peripheral circuitry, short-circuit current limited, and held at 0 V when VCC is below UVLO; bypass with 0.1 µF or larger ceramic capacitor."+ },+ {+ "number": "10",+ "name": "OVP/EN",+ "type": "input",+ "description": "Over-voltage/enable window comparator input that disables the output driver above the programmed level and disables the driver and resets SS below 1.9 V (typ); absolute maximum voltage is 10 V."+ },+ {+ "number": "11",+ "name": "VSENSE",+ "type": "input",+ "description": "Voltage amplifier inverting input, connected to the compensation network and to the boost output through a divider; absolute maximum input voltage is 10 V."+ },+ {+ "number": "12",+ "name": "RT",+ "type": "passive",+ "description": "Oscillator charging current programming resistor to GND, with 10 kΩ to 100 kΩ recommended and nominal voltage on the pin of 3 V; absolute maximum input current is 10 mA."+ },+ {+ "number": "13",+ "name": "SS",+ "type": "bidirectional",+ "description": "Soft-start pin that an external capacitor is charged through a current source, used as the voltage error signal during start-up, and discharged quickly when VCC drops out."+ },+ {+ "number": "14",+ "name": "CT",+ "type": "passive",+ "description": "Oscillator timing capacitor to GND that sets the PWM oscillator frequency, with its lead to GND kept as short and direct as possible."+ },+ {+ "number": "15",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply, connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with absolute maximum supply voltage of 18 V; output devices are inhibited unless VCC exceeds the upper UVLO threshold."+ },+ {+ "number": "16",+ "name": "DRVOUT",+ "type": "output",+ "description": "Totem-pole MOSFET gate driver output for the boost switch, which should use a series gate resistor; absolute maximum continuous gate drive current is 0.2 A."+ }+ ],+ "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: The extracted text lists pin names in a scrambled order (right-column names appear bottom-up), so pi; The datasheet covers the UCC2817-EP/UCC2818-EP family and the D package is shared; the MPN UCC2818MD; The schema has no field for headline electrical specs, so the specs were not extracted; the pin desc"+ ],+ "pages_sent": 7,+ "cost_usd": 0.0592,+ "at": "2026-10-07T22:41:34"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/ucc2818-ep",+ "pages": 23,+ "sha256": "0b1b2e5d62669f10",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "ucc2818mdrep.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "ucc2818mdrep-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "f6ba8c6ab5366904cedd9cf2ac8bc887de05d92de9abc5c639566d4cccaa95c7",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}