# IR4428STR

**UMW** · Gate Drivers · SOP-8

IR4428STR 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 | Not connected; the datasheet gives no function or limit for this pin. |
| 2 | INA | input | Input to Channel A; the datasheet states the inputs can handle negative voltages down to -10 V. |
| 3 | GND | power_in | Ground: all signals are referenced to this pin, and the device is not damaged by noise spikes of up to 5 V of either polarity on it. |
| 4 | INB | input | Input to Channel B; the datasheet states the inputs can handle negative voltages down to -10 V. |
| 5 | OUTB | output | Output of Channel B; rated for 2 A peak output current and withstands reverse output current up to 0.5 A without latching. |
| 6 | VCC | power_in | Bias supply input; the recommended supply range is 4.5 V to 20 V, with an absolute maximum of 25 V. |
| 7 | OUTA | output | Output of Channel A; rated for 2 A peak output current and withstands reverse output current up to 0.5 A without latching. |
| 8 | NC | unconnected | Not connected; the datasheet gives no function or limit for this pin. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage range (absolute maximum) | VCC |  |  | 25 | V |  | 4 |
| INA, INB voltage (absolute maximum) | VIN | -12 |  | 25 | V |  | 4 |
| SOIC package power (TA ≤70°C) | PD2 |  |  | 470 | mW | TA ≤70°C | 4 |
| Operating junction temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage temperature | TS | -45 |  | 150 | °C |  | 4 |
| Human body model (HBM) ESD |  |  |  | 2000 | V |  | 4 |
| Charged device model (CDM) ESD |  |  |  | 500 | V |  | 4 |
| Supply voltage range (recommended) | VCC | 4.5 |  | 20 | V |  | 5 |
| Ambient temperature (recommended) | TC | -40 |  | 125 | °C |  | 5 |
| Input signal high threshold | VIH | 2.4 |  |  | V |  | 6 |
| Input signal low threshold | VIL |  |  | 0.8 | V |  | 6 |
| Low output voltage | VOL |  |  | 0.025 | V |  | 6 |

## CAD (KiCad official)

- Symbol: `IR4428STR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ir4428str-etched.step` / `ir4428str-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ir4428str.step` / `ir4428str.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/8757273668286599168) (12 pp, sha256 `f612a688ad730f5a`, retrieved 2026-10-17, 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/ir4428str-datasheet.pdf)