NCP1380BDR2G
Public Unreviewedby Ray
onsemi AC-DC Controllers and Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownNCP1380BDR2G
onsemi · AC-DC Controllers and Regulators · SOIC-8
NCP1380BDR2G from onsemi, in a SOIC-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 | ZCD | input | Zero Crossing Detection. Connected to the transformer auxiliary winding to detect the core reset event for quasi-resonant valley switching. Also adjusts the over power protection: injecting a negative voltage smaller than 0.3 V on this pin performs over power protection. |
| 2 | FB | input | Feedback pin. Hooking an optocoupler collector to this pin allows output regulation via direct optocoupler connection. |
| 3 | CS | input | Current sense. This pin monitors the primary MOSFET peak current via an external sense resistor for cycle-by-cycle current-mode control. |
| 4 | GND | power_in | The controller ground reference. |
| 5 | DRV | output | Driver output to an external power MOSFET gate. Provides +500 mA / -800 mA peak source/sink capability with an internal clamp for gate protection. |
| 6 | VCC | power_in | Supplies the controller. Connected to an external auxiliary winding supply. Extended VCC range operation up to 28 V. |
| 7 | Fault | input | Over voltage and Over temperature protection input on A and B versions (this NCP1380B variant). Pulling this pin down with an NTC or up with a zener diode allows to latch the controller. On C and D versions this pin instead observes the HV rail for Brown-Out and OVP. |
| 8 | CT | passive | Timing capacitor pin. A capacitor connected here sets the timing capacitor value used in frequency foldback mode at light load. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
NCP1380ADR2GNCP1380BDR2GNCP1380CDR2GNCP1380DDR2G
CAD (KiCad official)
- Symbol:
NCP1380BDR2G - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
ncp1380bdr2g.step |
122 KB | You want the bare part, or you mark your own boards. |
ncp1380bdr2g-etched.step |
2.8 MB | You want the part with NCP1380BDR2G already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 668 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: onsemi datasheet (26 pp, sha256
0f75b6f5439c7249, retrieved 2026-08-17, tier: manufacturer) - 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).