OC7141

@@ -0,0 +1,41 @@+# OC7141++**OCX** · LED Drivers · SOT-23-5++OC7141 from OCX, in a SOT-23-5. 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 | GND | power_in | Chip ground reference. Connect to system ground and route the CS sense-resistor return trace short and wide to this pin to minimize output-current error. |+| 2 | CS | input | LED current-set pin. Sense voltage V_CS is regulated to a typical 100 mV (96-104 mV); output current I_LED = 100 mV / R_CS. Use a 1% resistor for accuracy. |+| 3 | VDD | power_in | Chip supply, 2.5 V to 6 V. Bypass with 1-4.7 µF close to the pin. For higher rail voltages, clamp with an external Zener so VDD stays ≤ 6 V (supply rail extendable to 400 V+). Quiescent current typ. 60 µA. |+| 4 | DRV | output | Gate-drive output for the external NMOS pass transistor. The internal error amplifier modulates DRV so that V_CS = 100 mV, regulating LED current from 10 mA up to 3 A. |+| 5 | DIM | input | PWM dimming input. Logic high (≥0.7·VDD) enables normal LED output; logic low (≤0.3·VDD) turns the LED off. Supports PWM up to 10 kHz; ≤1 kHz recommended for best linearity. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OCX |+| Package | SOT-23-5 |+| Category | LED-drv |+| Pins | 5 |++## CAD (KiCad official)++- Symbol: `OC7141`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [OCX datasheet](docs/oc7141-datasheet.pdf) (6 pp, sha256 `6c0efd194ffe82d5`, 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/oc7141-datasheet.pdf)

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