OB5282CPA
Public Made by Adomby adom
OB On Bright Elec AC-DC Controllers and Regulators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownOB5282CPA
OB On Bright Elec · AC-DC Controllers and Regulators · SOP-8
OB5282CPA 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 | PRT | input | Multiple functions pin. Connect an NTC resistor to ground for external OTP detection (VOTP ~1.2V, IRT ~120uA). A resistor from Vaux (auxiliary winding) programs the OVP trigger voltage (Ibias ~20uA, Ioutput_ovp ~170uA). Also used for transformer core demagnetization / valley detection. If both OTP and OVP are needed, a diode is placed between PRT and the NTC resistor. |
| 2 | FB | input | Feedback input pin. The PWM duty cycle is determined by the voltage on this pin combined with the current-sense signal at the CS pin. Thresholds: Vref_rising ~3.5V (enter frequency-rising mode), Vref_green ~2.10V (green mode), Vref_burst_H ~1.5V / Vref_burst_L ~1.4V (burst mode). Input impedance ~22 kΩ. |
| 3 | CS | input | Current-sense input. Detects primary-side switch current via an external sense resistor to program cycle-by-cycle OCP (VOCP_ref ~0.295V) and peak-power limiting (VTH_PK ~0.5V). Includes leading-edge blanking (~250ns). Input impedance ~40 kΩ. |
| 4 | GND | power_in | Ground reference for the IC. |
| 5 | GATE | output | Totem-pole gate driver output for the external power MOSFET. VOH ≥8V and VOL ≤1V at Io=20mA, VDD=15V. Output clamp ~12V. Rise time ~100ns / fall time ~20ns with CL=1000pF. |
| 6 | VDD | power_in | Power supply pin. Recommended operating VDD 12-28V. UVLO(ON) ~8.75V, UVLO(OFF) ~16.75V, OVP ~30V. Normal operating current ~2.5mA (typ), burst-mode current ~0.7mA. |
| 7 | NC | unconnected | No connection. |
| 8 | HV | power_in | High-voltage startup pin (rated up to 500V). Connected to the line input via resistors and diodes to source ~2mA startup current into VDD; also enables X-cap discharge and brownout detection (Vth_bo_L ~70Vac, Vth_bo_H ~77Vac at RHV=200kΩ). Post-startup leakage <10uA at HV=500V. |
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.
OB5282CPA
CAD (KiCad official)
- Symbol:
OB5282CPA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ob5282cpa-etched.step/ob5282cpa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ob5282cpa.step/ob5282cpa.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
ob5282cpa.step |
122 KB | You want the bare part, or you mark your own boards. |
ob5282cpa-etched.step |
2.2 MB | You want the part with OB5282CPA already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 529 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 (13 pp, sha256
8536401621c243b5, 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).