OB3353ACPA

@@ -0,0 +1,50 @@+# OB3353ACPA++**OB On Bright Elec** · LED Drivers · SOP-8++OB3353ACPA from OB On Bright Elec, in a SOP-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 | VIN | power_in | Power supply input. Recommended operating range 9V to 30V (abs max 33V). UVLO turn-off threshold ~8.3V with 800mV hysteresis. |+| 2 | GATE | output | Gate driver output pin for the external boost power MOSFET. Rise time ~40 ns and fall time ~20 ns into a 1 nF load. |+| 3 | GND | power_in | Device ground reference for all internal circuitry and the gate driver return. |+| 4 | CS | input | Current sense input from the external sense resistor at the MOSFET source. Used for current-mode PWM control; OCP threshold ~380 mV @ 90% duty. Diode/inductor short protection triggers at VTH_CS ~1.2 V. |+| 5 | FB | input | LED current feedback input. Voltage across the LED current sense resistor is regulated to the internal 400 mV reference (Vref_ea). |+| 6 | COMP | output | Boost converter loop compensation pin. Transconductance error amplifier output (Gm ~100 uA/V); tie an RC network to GND to set loop dynamics. VTH_CMP ~3.2 V flags FB-short-to-GND. |+| 7 | OVP | input | Over-voltage protection sense input. Trips when VOVP_OV ~2.0 V is reached (typically via a resistor divider from the boost output). OVP UVLO thresholds 250 mV (normal) / 150 mV (startup). |+| 8 | PWM | input | PWM signal input for PWM-to-analog dimming control. Logic-high >= 2.5 V, logic-low <= 1.3 V, duty 0-100%, recommended frequency 5-50 kHz. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OB On Bright Elec |+| Package | SOP-8 |+| Category | LED-drv |+| Pins | 8 |++## Ordering variants++- `OB3353ACPAACP`+- `OB3353ACPAACPA`+- `OB3353ACPAAKFP`+- `OB3353ACPAAKFPA`++## CAD (KiCad official)++- Symbol: `OB3353ACPA`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [OB On Bright Elec datasheet](docs/ob3353acpa-datasheet.pdf) (12 pp, sha256 `592275a8a3fd0ee1`, 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/ob3353acpa-datasheet.pdf)

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