component
OB2631UCPA-H
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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PCB Footprint
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Datasheet
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README
markdownOB2631UCPA-H
OB On Bright Elec · AC-DC Controllers and Regulators · SOP-8
OB2631UCPA-H 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 | VDD | power_in | IC DC power supply input. Absolute max -0.3V to 54V. UVLO(ON) 7.2V typ (enter), UVLO(OFF) 16.5V typ (recovery). VDD OVP threshold ~52.5V typ. |
| 2 | GND | power_in | Device ground reference for VDD and all internal circuitry. |
| 3 | FB | input | Feedback input. PWM duty cycle is determined by the voltage on this pin together with the CS (pin 4) current-sense signal. VFB open loop ~5.1V; burst mode enter/exit ~1.23V/1.33V; OLP threshold ~4.0V with 60ms debounce; input impedance ~30kΩ. Absolute max -0.3 to 7V. |
| 4 | CS | input | Current sense input from primary-side sense resistor. Internal leading-edge blanking ~330ns, OCP threshold ~0.5V (zero duty cycle), OCP clamp ~0.72V, control delay ~80ns. Absolute max -0.3 to 7V. |
| 5 | Drain | output | High-voltage MOSFET drain, connected to the primary winding of the flyback transformer. BVdss 650V min, Rds(on) 1.5Ω typ. Pins 5, 6, 7, 8 are internally shorted (all Drain) for heat dissipation via PCB copper. |
| 6 | Drain | output | High-voltage MOSFET drain (internally common with pins 5, 7, 8). Used for thermal spreading; tie to transformer primary and heat-sink copper. |
| 7 | Drain | output | High-voltage MOSFET drain (internally common with pins 5, 6, 8). Used for thermal spreading. |
| 8 | Drain | output | High-voltage MOSFET drain (internally common with pins 5, 6, 7). Used for thermal spreading. |
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.
OB2631UCPA-HOB2631UCP-H
CAD (KiCad official)
- Symbol:
OB2631UCPA-H - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ob2631ucpa-h-etched.step/ob2631ucpa-h-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ob2631ucpa-h.step/ob2631ucpa-h.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: OB On Bright Elec datasheet (10 pp, sha256
26fd81151b232a7b, 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).