OC7140

@@ -0,0 +1,44 @@+# OC7140++**OCX** · LED Drivers · SOIC-8-EP++OC7140 from OCX, in a SOIC-8-EP. 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 | VDD | power_in | Chip supply pin. Operating range 2.5V to 6V (absolute max 7V). Bypass with ~4.7uF capacitor placed close to the pin and GND. |+| 2 | DIM | input | PWM dimming input. Logic low turns the LED output off; logic high enables normal LED output. VIH ≥ 0.7*VDD, VIL ≤ 0.3*VDD. Maximum dimming frequency 10kHz (≤1kHz recommended for best linearity). |+| 3 | NC | unconnected | No connect. Leave floating. |+| 4 | LED | output | Drain of the internal 30V/50mΩ NMOS. Connect to LED cathode. Absolute max voltage 30V. The exposed ESOP-8 thermal pad is internally connected to this pin. |+| 5 | CS | input | Current-sense input. Regulates to VCS = 100mV (96-104mV) across the external sense resistor RCS; LED current = 100mV / RCS. Pins 5 and 6 are internally tied together. |+| 6 | CS | input | Current-sense input (paralleled with pin 5). Tie both pins to the top of the external sense resistor RCS. |+| 7 | NC | unconnected | No connect. Leave floating. |+| 8 | GND | power_in | Device ground reference. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OCX |+| Package | SOIC-8-EP |+| Category | LED-drv |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `OC7140`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`+- 3D model: SOIC-8-EP (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [OCX datasheet](docs/oc7140-datasheet.pdf) (6 pp, sha256 `0a9fd59080738aab`, retrieved 2026-08-17, 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:** `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/oc7140-datasheet.pdf)

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