OB2570TCPA-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
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README
markdownOB2570TCPA-H
OB On Bright Elec · AC-DC Controllers and Regulators · SOP-8
OB2570TCPA-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 | Power supply pin. Operating range 9 to 25V. UVLO(OFF) typical 15.4V (13.8-16.6V), UVLO(ON) typical 7V (6.5-7.5V), VDD OVP typical 28V (26-30V). Absolute maximum -0.3 to 30V. |
| 2 | GND | power_in | IC ground reference. Should be connected to the negative terminal of the input capacitor via single-point ground with the negative of the auxiliary winding and power sense resistor. |
| 3 | FB | input | Voltage feedback input from auxiliary winding. Connected to a resistor divider from the auxiliary winding reflecting output voltage. Reference voltage typical 2.0V (1.98-2.02V); output OVP threshold typical 2.6V. Absolute maximum -0.3 to 7V. |
| 4 | CS | input | Current sense input. Connect a sense resistor from this pin to ground to set the CC point and maximum output power. LEB time typical 325ns, OCP propagation delay 100ns, maximum over-current threshold 800mV. Absolute maximum -0.3 to 7V. |
| 5 | DRAIN | output | Internal power MOSFET drain output. BVdss = 650V (OB2570TCPA-H), Rdson typical 2.2Ω. Pins 5,6,7,8 are shorted together internally and to the MOSFET drain; increase copper area on these pins for thermal dissipation. Absolute maximum -0.3 to 24V listed as GATE input voltage (drain node connects to primary winding). |
| 6 | DRAIN | output | Internal power MOSFET drain output. Connected in parallel with pins 5, 7, 8. Increase copper area for thermal dissipation. |
| 7 | DRAIN | output | Internal power MOSFET drain output. Connected in parallel with pins 5, 6, 8. Increase copper area for thermal dissipation. |
| 8 | DRAIN | output | Internal power MOSFET drain output. Connected in parallel with pins 5, 6, 7. Increase copper area for thermal dissipation. |
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.
OB2570TCPA-HOB2570TCPA-HTCP-HOB2570TCPA-HPCPOB2570TCPA-HPCPA
CAD (KiCad official)
- Symbol:
OB2570TCPA-H - 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 |
|---|---|---|
ob2570tcpa-h.step |
122 KB | You want the bare part, or you mark your own boards. |
ob2570tcpa-h-etched.step |
2.2 MB | You want the part with OB2570TCPA-H already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 544 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 (11 pp, sha256
d6fe42eac386ece7, 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).