OB6561PXCPA

@@ -0,0 +1,50 @@+# OB6561PXCPA++**OB On Bright Elec** · AC-DC Controllers and Regulators · SOP-8++OB6561PXCPA 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 | INV | input | Inverting input of the internal error amplifier. Connected to a resistor divider from the system output for regulation feedback. Also used for system open-loop protection. |+| 2 | COMP | output | Output of the error amplifier. A feedback compensation network is placed between COMP and the INV pin to shape the voltage loop response. |+| 3 | MULT | input | Input of the internal multiplier. Connected to the rectified line voltage after the bridge diodes via a resistor divider to provide the sinusoidal reference to the current loop. Analog input range 0 to 7V (absolute max). |+| 4 | CS | input | Current sense input. Connected to the MOSFET source current-sensing node (sense resistor) for cycle-by-cycle current limiting with built-in leading-edge blanking. Analog input range 0 to 7V (absolute max). |+| 5 | ZCD | input | Zero current detection input. When activated, a new switching cycle starts (transition-mode operation). If tied to GND, the device is disabled. Max current 50mA source / -10mA sink. |+| 6 | GND | power_in | Ground reference for the device. |+| 7 | GD | output | Totem-pole gate driver output for driving an external power MOSFET. Features high-state clamping for gate protection. |+| 8 | VCC | power_in | DC supply voltage input. Operating range 9.5V to 28V with UVLO hysteresis; absolute max 30V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OB On Bright Elec |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `OB6561PXCPA`+- `OB6561PXCPAAP`++## CAD (KiCad official)++- Symbol: `OB6561PXCPA`+- 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/ob6561pxcpa-datasheet.pdf) (6 pp, sha256 `4986c654ff826960`, 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/ob6561pxcpa-datasheet.pdf)

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