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OB25133QCPA

Public Unreviewed

by Ray

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

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

markdown

OB25133QCPA

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

OB25133QCPA 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 Voltage feedback input from the auxiliary winding. Connected to a resistor divider from the auxiliary winding, which reflects the output voltage for primary-side CV regulation. Reference feedback threshold Vref_fb = 2.500 V (typ).
2 GND power_in Device ground / return for VDD supply and all internal circuitry.
3 VDD power_in IC power supply input. Recommended operating range 5-16 V; absolute max 20 V. UVLO(ON) = 3.7 V typ, UVLO(OFF) exit = 9.5 V typ, VDD_OVP = 18 V typ.
4 CS input Current sense input. Connected via a sense resistor Rs to the BJT emitter path; used for cycle-by-cycle over-current limiting and CC-mode current programming. OCP threshold Vth_ocp = 500 mV typ (485-515 mV min/typ/max range).
5 C power_out Internal high-voltage BJT collector pin. Pins 5, 6, 7, 8 are all bonded to the collector and are typically tied together on the PCB and connected to the primary-winding switching node. Collector-base breakdown 750 V.
6 C power_out Internal high-voltage BJT collector pin (shared with pins 5, 7, 8). Tie to primary switching node.
7 C power_out Internal high-voltage BJT collector pin (shared with pins 5, 6, 8). Tie to primary switching node.
8 C power_out Internal high-voltage BJT collector pin (shared with pins 5, 6, 7). Tie to primary switching node.

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.

  • OB25133QCPA

CAD (KiCad official)

  • Symbol: OB25133QCPA
  • 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
ob25133qcpa.step 122 KB You want the bare part, or you mark your own boards.
ob25133qcpa-etched.step 2.5 MB You want the part with OB25133QCPA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 608 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 d791a88b3ad50af9, 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