component

SN03ACPA

Public Made by Adom

by adom

OB On Bright Elec AC-DC Controllers and Regulators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

markdown

SN03ACPA

OB On Bright Elec · AC-DC Controllers and Regulators · SOP-8

SN03ACPA 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 FB input Inverting input of the internal error amplifier. Compared against a trimmed 2.5V (±1.5%) internal reference to determine the COMP output. An external loop compensation network is placed between FB and COMP.
2 COMP output Output of the error amplifier. Feedback compensation network connects between FB and COMP. Internally subtracted by 2.5V and fed to the multiplier; drives the PWM duty cycle when compared with the CS voltage. Upper clamp ~4.9V, lower clamp ~2.25V.
3 MULT input Analog multiplier input. Connect via a resistor divider to the rectified AC line (after the bridge diodes) to provide a sinusoidal reference for the current loop, enabling power factor correction. Linear operating range 0 to 3.5V.
4 CS input Current sense input. Connect to the MOSFET source current-sensing resistor. Internal leading-edge blanking suppresses the turn-on current spike. Cycle-by-cycle current limit clamp is 1.0V (typ); comparator delay to output is 200ns typ.
5 ZCD input Zero current detection input. Senses the auxiliary winding via an external resistor; when the pin falls below 0.25V (typ) a new PWM cycle is initiated. Internally clamped to ~5.7V upper and 0V lower; source/sink capability ~5mA/10mA. Max source 50mA, max sink -10mA.
6 GND power_in Device ground reference for all internal circuits and the gate driver return.
7 GD output Totem-pole gate driver output for the external power MOSFET. Slew-rate controlled to reduce EMI; output high clamped to ~16V (18V max) to protect the MOSFET gate. Rise/fall times 80ns/30ns typ into 1nF.
8 VCC power_in DC supply voltage. UVLO turn-on 16.5V typ, turn-off 8.8V typ (hysteresis ~7.7V). Internal Zener clamp Vz ~38V @5mA; VCC over-voltage protection threshold 36.5V. Startup current ~5µA, operating current ~5mA @ 1nF/70kHz.

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.

  • SN03ACPA
  • SN03AAP

CAD (KiCad official)

  • Symbol: SN03ACPA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: sn03acpa-etched.step / sn03acpa-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn03acpa.step / sn03acpa.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sn03acpa.step 122 KB You want the bare part, or you mark your own boards.
sn03acpa-etched.step 1.8 MB You want the part with SN03ACPA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 456 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: OB On Bright Elec datasheet (10 pp, sha256 476c71ffa00e8047, 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