# UCC2818AQDRQ1

**Texas Instruments** · AC-DC Controllers And Regulators · SOP-16

UCC2818AQDRQ1 from Texas Instruments, in a SOP-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 pin for the controller. |
| 2 | PKLMT | input | PFC peak current limit input that sets the peak-current limit. |
| 3 | CAOUT | output | Current amplifier output. |
| 4 | CAI | input | Current amplifier noninverting input. |
| 5 | MOUT | bidirectional | Multiplier output and current amplifier inverting input. |
| 6 | IAC | input | Input current proportional to the AC input voltage. |
| 7 | VAOUT | output | Voltage amplifier output. |
| 8 | VFF | input | Feed-forward voltage input. |
| 9 | VREF | power_in | Voltage reference output. |
| 10 | OVP/EN | input | Overvoltage protection and enable input. |
| 11 | VSENSE | input | Voltage amplifier inverting input. |
| 12 | RT | input | Oscillator charging current input. |
| 13 | SS | input | Soft-start input. |
| 14 | CT | input | Oscillator timing capacitor input. |
| 15 | VCC | power_in | Positive supply voltage input. |
| 16 | DRVOUT | output | Gate drive output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `UCC2818AQDRQ1`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files: `ucc2818aqdrq1-etched.step` / `ucc2818aqdrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2818aqdrq1.step` / `ucc2818aqdrq1.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/ucc2818a-q1) (27 pp, sha256 `597e432f109f9c6f`, retrieved 2026-10-08, 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/ucc2818aqdrq1-datasheet.pdf)