# DK1203

**Shenzhen DongKe Semicon** · AC-DC Controllers And Regulators · DIP-8

DK1203 from Shenzhen DongKe Semicon, in a DIP-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 | OB | input | Startup pin with internal startup circuit connected to high-voltage OC pins; leave unconnected in typical application. |
| 2 | VCC | power_in | Power supply pin; externally connect 10µF~100µF storage capacitor to ground. |
| 3 | GND | power_in | Ground pin. |
| 4 | NC | unconnected | Empty pin with no internal electrical connection. |
| 5 | FB | input | Feedback control pin; connect 1nF~10nF capacitor to ground; photo-coupler controls output to ground. |
| 6 | NC | unconnected | Empty pin with no internal electrical connection. |
| 7 | OC | output | Output pin connected to internal high-voltage power transistor; externally connected to switching transformer; high-voltage up to 600V+. |
| 8 | OC | output | Output pin connected to internal high-voltage power transistor; externally connected to switching transformer; high-voltage up to 600V+. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen DongKe Semicon |
| Package | DIP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `DK1203`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `dk1203-etched.step` / `dk1203-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dk1203.step` / `dk1203.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen DongKe Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917982243770368) (6 pp, sha256 `b198fd6636a5c268`, retrieved 2026-09-21, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/dk1203-datasheet.pdf)