# OB2225NCP

**OB(On-Bright Elec)** · AC-DC Controllers & Regulators · SOP-8

OB2225NCP from OB(On-Bright Elec), in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply and output voltage feedback pin; recommended supply 8 to 12V, absolute maximum -0.3 to 20V, with UVLO off at 13.5V typ and OVP at 16V typ. |
| 2 | GND | power_in | Ground. |
| 3 | NC | unconnected | Should be floating or connected to ground during normal operation. |
| 4 | CS | input | Current sense input with cycle-by-cycle over-current threshold of 575mV typ; absolute maximum -0.3 to 7V. |
| 5 | Drain | passive | Power MOSFET drain pin (600V min breakdown), internally common with pins 6, 7 and 8. |
| 6 | Drain | passive | Power MOSFET drain pin (600V min breakdown), internally common with pins 5, 7 and 8. |
| 7 | Drain | passive | Power MOSFET drain pin (600V min breakdown), internally common with pins 5, 6 and 8. |
| 8 | Drain | passive | Power MOSFET drain pin (600V min breakdown), internally common with pins 5, 6 and 7. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | OB(On-Bright Elec) |
| Package | SOP-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VDD Under Voltage Lockout Enter | UVLO_ON | 6.8 | 7.2 | 7.6 | V | VDD falling, gate disappear | 5 |
| Over voltage protection Threshold | OVP | 15 | 16 | 17 | V | Ramp VDD until gate shut down | 5 |
| LEB time | TLEB | 150 | 200 | 250 | ns |  | 5 |
| Over current detection threshold voltage | Vth_oc | 550 | 575 | 600 | mV |  | 5 |
| Short Current protection threshold voltage | Vth_scp | 0.6 | 0.7 | 0.8 | V |  | 5 |
| CS floating protection threshold voltage | Vth_flt | 0.9 | 1 | 1.1 | V |  | 5 |
| IC Maximum frequency | Freq_Max | 36 | 40 | 44 | KHz |  | 5 |
| Maximum Duty Cycle | Dmax | 47 | 50 | 53 | % |  | 5 |
| Operation supply current | I_VDD_op |  | 1 | 2 | mA | CS=0V | 5 |
| Operation Current | I_VDD_op | 0.45 |  | 0.6 | mA | VDD=13V | 5 |
| Standby Current | I_startup |  |  | 10 | uA | VDD=UVLO(off) -1V | 5 |
| Frequency shuffling range | Δf/Freq | -8 |  | 8 | % |  | 5 |
| VDD Regulation Voltage |  |  | 12.6 |  | V | In normal regulation, VDD regulated to average of 12.6V | 5 |
| OCP propagation delay | Td_oc |  | 200 |  | ns |  | 5 |
| VDD divider coefficient | Kvdd/vref |  | 8.5 |  |  |  | 5 |
| Shuffling frequency | F_shuffling |  | 75 |  | Hz |  | 5 |
| Burst Mode Switch Frequency | F_Burst |  | 20 |  | KHz |  | 5 |
| Over Loading Debounce Time | Td_olp |  | 130 |  | ms |  | 5 |
| MOSFET Drain-Source Breakdown Voltage | BVdss |  | 600 |  | V |  | 5 |
| On Resistance | Rdson |  | 15 |  | Ω | Static, Id=0.45A | 5 |
| VDD Supply Voltage | VDD | 8 |  | 12 | V |  | 2 |
| VDD Voltage | VDD | -0.3 |  | 20 | V |  | 2 |
| CS Input Voltage | CS | -0.3 |  | 7 | V |  | 2 |
| Operating Junction Temperature | TJ | -40 |  | 150 | ℃ |  | 2 |
| Operating Ambient Temperature | TA | -40 |  | 85 | ℃ |  | 2 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Lead Temperature |  |  |  | 260 | ℃ | Soldering, 10secs | 2 |
| Thermal resistance junction to ambient | RθJA |  | 90 |  | ℃/W | SOP8, Drain pin connected 100mm2 PCB copper clad | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | Note: Drain Pin Connected 100mm2 PCB copper | 2 |

## CAD (KiCad official)

- Symbol: `OB2225NCP`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ob2225ncp-etched.step` / `ob2225ncp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ob2225ncp.step` / `ob2225ncp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [OB(On-Bright Elec) datasheet](docs/ob2225ncp-datasheet.pdf) (9 pp, sha256 `f0a0a7ec2fd8da3e`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ob2225ncp-datasheet.pdf)