component

OB3353ACPA

Public Made by Adom

by adom

OB On Bright Elec LED Drivers, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs ob3353acpa: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
viewers ob3353acpa: viewers · Ray 1mo ago
ob3353acpa-etched.fit.json ob3353acpa: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
ob3353acpa-etched.glb ob3353acpa: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
ob3353acpa-etched.step ob3353acpa: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
ob3353acpa.glb Publish 0.1.0 · Ray 1mo ago
ob3353acpa.kicad_mod Publish 0.1.0 · Ray 1mo ago
ob3353acpa.kicad_sym Publish 0.1.0 · Ray 1mo ago
ob3353acpa.lbr Publish 0.1.0 · Ray 1mo ago
ob3353acpa.step Publish 0.1.0 · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
page.json ob3353acpa: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 11h ago
README.md ob3353acpa: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago

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

Same part, different packaging or reel option.

  • OB3353ACPA
  • OB3353ACPAAKFP
  • OB3353ACPAAKFPA

CAD (KiCad official)

  • Symbol: OB3353ACPA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: ob3353acpa-etched.step / ob3353acpa-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ob3353acpa.step / ob3353acpa.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ob3353acpa.step 122 KB You want the bare part, or you mark your own boards.
ob3353acpa-etched.step 2.4 MB You want the part with OB3353ACPA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 579 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 (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