# OB3399MP

**OB(On-Bright Elec)** · AC-DC Controllers & Regulators · SOT-23-6

OB3399MP from OB(On-Bright Elec), in a SOT-23-6. 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 | GATE | output | Gate driver output that drives the external power MOSFET, with a clamp voltage of 10 V and a gate voltage absolute maximum of -0.3 to 25 V. |
| 2 | CS | input | Current sense input with an over current threshold of 492 to 508 mV (500 mV typ.) and a 500 ns leading edge blanking time, where the external sense resistor Rs sets the LED constant current. |
| 3 | VDD | power_in | Power supply pin with a recommended supply range of 12 to 25 V, a UVLO(ON) of 7.3 to 9.3 V, and a VDD clamp of 25 V. |
| 4 | FB | input | Connected to a resistor divider from the primary or auxiliary winding to reflect output voltage, regulated at 1.2 V (typ.) with an over-voltage protection threshold of about 1.4 V (typ.). |
| 5 | RL | bidirectional | Load regulation configuration pin, where the resistor R3 connected to RL sets the CV load compensation. |
| 6 | GND | power_in | Ground reference pin for the controller. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | OB(On-Bright Elec) |
| Package | SOT-23-6 |
| Category | Power Management ICs |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `OB3399MP`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ob3399mp-etched.step` / `ob3399mp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ob3399mp.step` / `ob3399mp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [OB(On-Bright Elec) datasheet](docs/ob3399mp-datasheet.pdf) (10 pp, sha256 `828ddf4422375362`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/ob3399mp-datasheet.pdf)