# SE9016-HF

**Seaward Elec** · Battery Management ICs · SOT-23-5

SE9016-HF from Seaward Elec, in a SOT-23-5. 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 | CHRG | output | Open-drain charge status output that is pulled low by an internal N-channel MOSFET while the battery is charging and is Hi-Z when the charge cycle is completed. |
| 2 | GND | power_in | Ground. |
| 3 | BAT | power_out | Charge current output that provides charge current to the battery and regulates the final float voltage to 4.21V. |
| 4 | VCC | power_in | Positive input supply voltage that powers the charger, ranges from 3.5 to 6V and should be bypassed with at least a 1µF capacitor. |
| 5 | PROG | passive | Charge current program, charge current monitor and shutdown pin, set by a single resistor to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Seaward Elec |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |

## 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 |  | the IC is from the die to the copper lead frame, | 9 |

## CAD (KiCad official)

- Symbol: `SE9016-HF`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `se9016-hf-etched.step` / `se9016-hf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `se9016-hf.step` / `se9016-hf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Seaward Elec datasheet](docs/se9016-hf-datasheet.pdf) (10 pp, sha256 `2b2b8774d0bb24a7`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/se9016-hf-datasheet.pdf)