dio8950so8

@@ -0,0 +1,47 @@+# DIO8950SO8++**DIOO** · LED Drivers · SOIC-8++DIO8950SO8 from DIOO, in a SOIC-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 | Ground pin. Device return; tie to pin 4 (also GND) at a single star point near the current-sense resistor. |+| 2 | CS | input | Current-sense input. Connect the sense resistor RS between LEDN and GND; ILED = VREF / RS where VREF ≈ 153 mV (146-160 mV). Internal cycle-by-cycle CS clamp at VCS_LIMIT ≈ 3.8 V (3.6-4 V max). |+| 3 | COMP | passive | Loop-compensation pin for the internal transconductance error amplifier. Connect a compensation capacitor (≈1 µF recommended) between COMP and GND to set the current-loop crossover well below the line frequency. Internal pull-up current ICOMP ≈ 7 µA (6-8 µA) when 1.2 V < VCOMP < 2.4 V. |+| 4 | GND | power_in | Ground pin (second GND). Internally tied to pin 1; both must connect to the system ground plane. |+| 5 | VIN | power_in | IC supply pin, charged from the HV JFET on pin 8. Must be locally bypassed to GND with CVIN. UVLO turn-on ≈ 13.8 V (12.8-14.8 V), turn-off ≈ 8.8 V (8-9.6 V); internal OVP shunt clamps at VVIN,OVP ≈ 18.2 V (16.4-20 V) with 3-8 mA shunt. Recommended operating range 10-13.6 V, absolute max 30 V. |+| 6 | FB | input | Output-voltage feedback input from a resistor divider off the boost output. Used to detect LED-open / output OVP: when VFB > VFB_H ≈ 1.6 V (1.5-1.7 V) the driver is shut down and the HV path is disconnected until VIN falls to VVIN,OFF; also monitored against VFB_L ≈ 300 mV (255-345 mV). OVP leading-edge blanking TLEB ≈ 1 µs. Absolute-max input -0.3 to 5 V. |+| 7 | DRV | output | Gate-driver output for the external primary boost MOSFET. Rise time ≈100 ns and fall time ≈50 ns into CLOAD = 1 nF; max switching frequency fMAX ≈ 130 kHz (COMP < 1.2 V), max on-time TON,MAX ≈ 35 µs. Absolute-max DRV voltage 20 V. |+| 8 | HV | power_in | High-voltage JFET input. Connects to the rectified BUS voltage and charges CVIN through the internal HV JFET at startup, eliminating the need for an auxiliary winding. Recommended operating range 30-600 V; absolute max 700 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | DIOO |+| Package | SOIC-8 |+| Category | LED-drv |+| Pins | 8 |++## Ordering variants++- `DIO8950SO8`++## CAD (KiCad official)++- Symbol: `DIO8950SO8`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [DIOO datasheet](docs/dio8950so8-datasheet.pdf) (None pp, sha256 `eabb82b7d885fed3`, 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/dio8950so8-datasheet.pdf)

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