NCR320ZX

@@ -0,0 +1,46 @@+# NCR320ZX++**Nexperia** · LED Drivers · SOT-223-4++NCR320ZX from Nexperia, in a SOT-223-4. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VEN | input | Enable voltage input. Turning on the internal NPN driver by biasing the base network. Absolute maximum VEN = 25 V for NCR320Z. Typical enable current IEN = 1.2 mA at VEN = 12 V. Internal bias resistor RB ≈ 10 kΩ. |+| 2 | REXT | passive | External current-setting resistor connection. Tie an external resistor (Rext) between REXT and GND (in series with the internal 95 Ω emitter resistor) to program the stabilized output current above the built-in 10 mA baseline, up to a maximum of 250 mA at Rext = 3 Ω. Leave open for the default ~10 mA output. |+| 3 | GND | power_in | Ground / common return for the enable network and the internal emitter resistor. Reference for VEN and REXT. |+| 4 | IOUT | output | Regulated (constant-current) output. Connects to the collector of the internal NPN transistor; typically wired between the LED cathode and the load supply (up to Vout,max = 16 V). Delivers stabilized Iout = 10 mA nominal (up to 250 mA with external Rext). Requires Vout ≥ 1.4 V of headroom (Vout,min = VCC − VLED). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOT-223-4 |+| Category | LED Drivers |+| Pins | 4 |++## Ordering variants++Same part, different packaging or reel option.++- `NCR320ZX`+- `NCR321Z`++## CAD (KiCad official)++- Symbol: `NCR320ZX`+- Footprint: `Package_TO_SOT_SMD:SOT-223`+- 3D model: SOT-223-4 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588948952598630400) (18 pp, sha256 `e7f8c945f0cc83cc`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ncr320zx-datasheet.pdf)

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