# UCC3808APWTR-2

**Texas Instruments** · AC-DC Controllers And Regulators · TSSOP-8

UCC3808APWTR-2 from Texas Instruments, in a TSSOP-8. 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 | OUTA | output | Alternating high-current output stage providing 500mA peak pull current and 1A peak sink current for power MOSFET gate drive; switches at half oscillator frequency with 60-200ns dead time between outputs and low-impedance overshoot/undershoot clamping. |
| 2 | VDD | power_in | Power supply input; bypass to GND with 1µF decoupling ceramic capacitor placed close to package plus electrolytic storage capacitor; operating range 5-14V for UCC3808A-2. |
| 3 | COMP | output | Error amplifier output and PWM comparator input; 2MHz bandwidth operational amplifier with low output impedance capable of sourcing and sinking current; includes internal current limiting and full-cycle soft-start via voltage clamping. |
| 4 | FB | input | Error amplifier non-inverting input; maintain minimal lead length and stray capacitance for optimal stability and noise immunity. |
| 5 | CS | input | Current sense input for peak current and overcurrent comparator with 1.9-2.5V/V gain; internal MOSFET discharges external filter capacitor during oscillator dead time; 0.7-0.8V overcurrent threshold triggers soft-start cycle. |
| 6 | RC | output | Oscillator frequency programming pin generating sawtooth output; connect external timing resistor (10kΩ-200kΩ recommended) from VDD and timing capacitor (100pF-1000pF recommended) to GND; frequency ≈ 1.41/(√RC). |
| 7 | GND | power_in | Reference and power ground for all functions; use low-impedance PCB ground plane due to high current and high frequency operation of this device. |
| 8 | OUTB | output | Alternating high-current output stage providing 500mA peak pull current and 1A peak sink current for power MOSFET gate drive; switches at half oscillator frequency with 60-200ns dead time between outputs and low-impedance overshoot/undershoot clamping. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `UCC3808APWTR-2`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ucc3808apwtr-2-etched.step` / `ucc3808apwtr-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc3808apwtr-2.step` / `ucc3808apwtr-2.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/ucc3808a-2) (27 pp, sha256 `a8e88286e9a900bf`, retrieved 2026-10-07, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/ucc3808apwtr-2-datasheet.pdf)