OC5022B

@@ -0,0 +1,44 @@+# OC5022B++**OCX** · LED Drivers · ESOP-8++OC5022B from OCX, in a ESOP-8. 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 | Device ground return. Connect directly to the current-sense resistor RCS ground node with a short, wide trace to preserve output-current accuracy. |+| 2 | NC | unconnected | No connect. Leave floating (悬空不接). |+| 3 | DIM | input | Dimming control input supporting both PWM and linear (analog) dimming. Pulling DIM to GND shuts off the LED output; DIM > 3.1V gives 100% output current. Linear dimming range is 1.1V-3.1V (shutdown threshold ~0.9V). Must not be left floating; tie high when unused, and add a small (>=10nF) cap to GND when using linear dimming. |+| 4 | SW | output | Switch node; drain of the internal 60V power MOSFET (RDSON ~70mOhm at VGS=5V). Connect to the inductor and freewheel diode of the buck stage. The ESOP-8 exposed pad is internally tied to SW. |+| 5 | CS | input | Inductor peak-current sense input. Trips at VCS_TH = 245-265mV (typ. 255mV) across the external RCS sense resistor to terminate the on-time. Pins 5 and 6 are internally tied together; use a short, wide Kelvin connection to RCS. |+| 6 | CS | input | Inductor peak-current sense input (paralleled with pin 5). Connect together with pin 5 to the RCS/inductor return node. |+| 7 | TOFF | input | Off-time programming pin. An external capacitor COFF to GND sets TOFF = 0.51 * 150kOhm * (COFF + 8pF) + 61ns. With no capacitor the internal minimum TOFF is ~650ns. |+| 8 | VDD | power_in | Chip supply, internally clamped by a Zener to ~5.5V (max Zener sink current 10mA). Powered from VIN through a dropping resistor RVDD = (VIN - 5.5V) / IVDD (IVDD typ 2mA). UVLO releases at ~2.6V rising with 0.4V hysteresis. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OCX |+| Package | ESOP-8 |+| Category | LED-drv |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `OC5022B`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`+- 3D model: ESOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [OCX datasheet](docs/oc5022b-datasheet.pdf) (7 pp, sha256 `450ce8ff55ea9080`, 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/oc5022b-datasheet.pdf)

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