# KP2143SGA

**Kiwi Instruments** · AC-DC Controllers and Regulators · SOP-7

KP2143SGA from Kiwi Instruments, in a SOP-7. 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 | VDD | power_in | Chip supply pin. Recommended operating supply 11-27V. VDD_ON turn-on threshold ~16.3V, VDD_OFF turn-off ~9V, OVP threshold ~30V, internal clamp ~34.5V @ 7mA. |
| 2 | FB | input | System feedback pin. Auxiliary winding voltage is divided by resistors and fed to FB; used for CV-mode output-voltage regulation and CC-mode output-current regulation. Internal reference VFBREF = 2.0V; short-protection threshold VFB_SLP = 1.15V. |
| 3 | CC | input | Constant-current control pin. Requires a capacitor between CC and GND; typical recommended value 100nF. |
| 4 | CS | input | Current-sense input pin. Cycle-by-cycle over-current protection threshold Vcs(max) = 1.0V; leading-edge blanking time TLEB = 500ns. |
| 5 | Drain | passive | Drain of the internal 650V power MOSFET (tied together with pin 6). Rdson typical 2.6Ω (KP2143SGA). Absolute-max drain voltage -0.3V to 650V. |
| 6 | Drain | passive | Drain of the internal 650V power MOSFET (tied together with pin 5). Rdson typical 2.6Ω (KP2143SGA). Absolute-max drain voltage -0.3V to 650V. |
| 7 | GND | power_in | Chip reference ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Kiwi Instruments |
| Package | SOP-7 |
| Category | PMIC |
| Pins | 7 |

## Ordering variants

Same part, different packaging or reel option.

- `KP2143SGA`
- `KP2144SGA`
- `KP2144DP`

## CAD (KiCad official)

- Symbol: `KP2143SGA`
- Footprint: `Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm`
- 3D model: SOP-7 (KiCad packages3D, STEP)
- 3D model files: `kp2143sga-etched.step` / `kp2143sga-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kp2143sga.step` / `kp2143sga.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Kiwi Instruments datasheet](docs/kp2143sga-datasheet.pdf) (8 pp, sha256 `9048d4cb0bce3d2f`, retrieved 2026-08-17, 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:** `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).

[Datasheet PDF](docs/kp2143sga-datasheet.pdf)