OB3379ZCPA-D 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	LPF	bidirectional	Low-pass filter pin for PWM-to-analog dimming. When HPWM dimming frequency is 10kHz-40kHz, LPF pin is left floating; when HPWM frequency is 200Hz-10kHz, a capacitor from LPF to GND is recommended to reduce output current ripple.
2	HPWM	input	HPWM signal input pin for PWM-to-analog dimming control. Input thresholds: high >=2.5V, low <=1.3V. Supports 200Hz to 40kHz dimming frequency.
3	ZVS	input	Quasi-Resonant (zero-voltage switching) detect signal input. Also used for LED open protection with a threshold Vth_ZVS typically 4V (3.8-4.2V).
4	CS	input	Current sense terminal. Senses the primary MOSFET source current across an external sense resistor. Over-current threshold Vth_ocp typ. 0.8V; leading-edge blanking ~350ns.
5	DRAIN	power_out	Drain of the integrated high-voltage MOSFET (BVdss = 100V min). Connects to the switching node of the buck converter (inductor/freewheeling diode).
6	VIN	power_in	Power supply input. Recommended operating range 9V to 30V (absolute max 35V). UVLO turn-on ~7.2V, UVLO release ~8V.
7	ADIM	input	Analog dimming input. The voltage on ADIM sets the internal reference that determines the LED current. Recommended range 0V to 5V; inner clamp ~250mV at ADIM=2.5V.
8	GND	power_in	Power ground reference for the controller and integrated MOSFET source return.

Key specifications

Parameter	Value
Manufacturer	OB On Bright Elec
Package	SOP-8
Category	LED-drv
Pins	8

Ordering variants

Same part, different packaging or reel option.

OB3379ZCP-D
OB3379ZCPA-D
OB3379YCP-D
OB3379YCPA-D

CAD (KiCad official)

Symbol: OB3379ZCPA-D
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 (11 pp, sha256 3be4d3dce87cc9b3, 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