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OB2281AMP

Public Made by Adom

by adom

OB On Bright Elec AC-DC Controllers and Regulators, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Datasheet

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Contents

README

markdown

OB2281AMP

OB On Bright Elec · AC-DC Controllers and Regulators · SOT-23-6

OB2281AMP from OB On Bright Elec, in a SOT-23-6. 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 GND power_in Ground reference for the IC.
2 FB input Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at Pin CS. Input impedance ~30 kΩ; VFB open-loop voltage ~5.1 V; OLP threshold ~4.4 V.
3 PRT input Dual functions pin. Connecting an NTC resistor to ground provides external OTP detection (VOTP ~1 V, IRT ~100 uA). Connecting a resistor from Vaux adjusts the output OVP trigger voltage (Ioutput_ovp ~60 uA). If both OTP and OVP are needed, a diode should be connected between PRT pin and the NTC resistor.
4 CS input Current sense input from the primary-side MOSFET source resistor. Internal current-limit threshold VTH_OC ~0.45 V (zero duty), OCP clamp ~0.72 V, leading-edge blanking 300 ns.
5 VCC power_in Power supply pin. Recommended operating range 12-26 V; UVLO(ON) ~7.3 V typ, UVLO(OFF)/recovery ~16.2 V typ, VCC OVP threshold ~28 V typ.
6 Gate output Totem-pole gate driver output for external power MOSFET. Output clamp ~11.5 V; rise ~150 ns, fall ~50 ns into 1000 pF.

Key specifications

Parameter Value
Manufacturer OB On Bright Elec
Package SOT-23-6
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • OB2281AMP

CAD (KiCad official)

  • Symbol: OB2281AMP
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: ob2281amp-etched.step / ob2281amp-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ob2281amp.step / ob2281amp.glb are the bare package body.

Provenance

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

  • Datasheet: OB On Bright Elec datasheet (11 pp, sha256 073c9cbb77a7db88, 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