OC6801B from OCX, 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	DRV	output	Gate-drive output for the external N-channel power MOSFET. Rated up to 8 V max; typical rise/fall time ~50 ns into a 500 pF load.
2	VDD	power_in	Chip supply input. Operating range 5-40 V (absolute max 45 V). UVLO rising threshold ~4.8 V; typical operating current 2.5 mA at Fop = 200 kHz.
3	EN	input	Enable input, active high. VIH >= 3.2 V, VIL <= 0.8 V. Absolute max 45 V; standby current ~75 uA when EN is low.
4	ROSC	input	Oscillator frequency-set pin. External resistor to GND sets switching frequency per Fs = 4.83e7 / (ROSC + 1.08e5); ROSC=330 kΩ gives ~150 kHz. Tying pin directly to GND defaults to ~450 kHz. Absolute max 6.5 V.
5	VFB	input	Output-voltage feedback input to the internal error amplifier. Regulation reference is 1.000 V (min 0.975 V, max 1.025 V). Set Vout via a resistor divider: Vo = (R1+R2)/R1 * VFB. Absolute max 6.5 V.
6	COMP	output	Error-amplifier (EA) output; loop compensation node. Internally compensated, so the pin may be left floating. An external 10-100 nF cap to GND extends the soft-start time (larger cap = longer soft-start, but lower loop bandwidth). Absolute max 6.5 V.
7	GND	power_in	Device ground reference for supply, logic, and analog blocks.
8	VCS	input	MOSFET switch-current sense input for cycle-by-cycle current limiting. Overcurrent threshold VCS_TH = 250 mV (typ, 240-260 mV). Peak inductor/MOSFET current is set by the sense resistor: IPK <= 0.25 V / RCS. Absolute max 6.5 V.

Key specifications

Parameter	Value
Manufacturer	OCX
Package	SOP-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: OC6801B
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`oc6801b.step`	122 KB	You want the bare part, or you mark your own boards.
`oc6801b-etched.step`	2.0 MB	You want the part with `OC6801B` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: OCX datasheet (7 pp, sha256 92b03432cdef301e, 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