# IR4427STR

**UMW** · Gate Drivers · SOP-8

IR4427STR from UMW, in a SOP-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 | NC | unconnected | Listed as NC (no connection) in the SOP-8 lead definitions; the datasheet gives no function for this pin. |
| 2 | INA | input | Input to Channel A, referenced to GND; the datasheet states the inputs can handle negative voltages down to -10 V. |
| 3 | GND | power_in | Ground pin to which all signals are referenced; the datasheet states the device is not damaged by noise spikes of up to 5 V of either polarity on this pin. |
| 4 | INB | input | Input to Channel B, referenced to GND; the datasheet states the inputs can handle negative voltages down to -10 V. |
| 5 | OUTB | output | Output of Channel B, a 2 A peak gate-drive output; the datasheet states the output withstands reverse currents up to 0.5 A without damage or logic confusion. |
| 6 | VCC | power_in | Bias supply input with a single-supply range of 4.5 V to 25 V per the datasheet features. |
| 7 | OUTA | output | Output of Channel A, a 2 A peak gate-drive output; the datasheet states the output withstands reverse currents up to 0.5 A without damage or logic confusion. |
| 8 | NC | unconnected | Listed as NC (no connection) in the SOP-8 lead definitions; the datasheet gives no function for this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Motor Driver ICs |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `IR4427STR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ir4427str-etched.step` / `ir4427str-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ir4427str.step` / `ir4427str.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757273656521576448) (11 pp, sha256 `365901a166f39aeb`, retrieved 2026-10-09, 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/ir4427str-datasheet.pdf)