# KP18055ESPA

**Kiwi Instruments** · LED Drivers · SOP-8-EP

KP18055ESPA from Kiwi Instruments, in a SOP-8-EP. 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 | PWM1 | input | Channel 1 digital PWM dimming input; when left floating the default state is full output current, and the PWM high and low levels are specified as VPWMH 2.5 V and VPWML 0.5 V. |
| 2 | CS1 | output | Channel 1 output current sense pin, where an external sense resistor Rcs sets the LED1 current; the CS voltage absolute maximum is -0.3 to 7 V. |
| 3 | PWM2 | input | Channel 2 digital PWM dimming input; when left floating the default state is full output current, and grounding it reduces the chip current to 0; the PWM voltage absolute maximum is -0.3 to 7 V. |
| 4 | CS2 | output | Channel 2 output current sense pin, where an external sense resistor Rcs sets the LED2 current; the CS voltage absolute maximum is -0.3 to 7 V. |
| 5 | LED2 | input | Connects to the negative terminal of LED2; the LED pin voltage absolute maximum is -0.5 to 500 V. |
| 6 | LED1 | input | Connects to the negative terminal of LED1; the LED pin voltage absolute maximum is -0.5 to 500 V. |
| 7 | NC | unconnected | No connection; the pin is left floating in the application. |
| 8 | Vin | power_in | Chip supply pin connected to the bus voltage, with a start-up threshold of 8 V, shut-off threshold of 7.7 V, and an absolute maximum of -0.5 to 700 V. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Kiwi Instruments |
| Package | SOP-8-EP |
| Category | LED Drivers |
| Pins | 9 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Vin voltage |  | -0.5 |  | 700 | V |  | 3 |
| LED voltage |  | -0.5 |  | 500 | V |  | 3 |
| PWM, CS voltage |  | -0.3 |  | 7 | V |  | 3 |
| Power dissipation |  |  |  | 1.5 | W | TA=50°C | 3 |
| Chip operating junction temperature |  | -40 |  | 150 | °C |  | 3 |
| Storage temperature |  | -65 |  | 150 | °C |  | 3 |
| Pin temperature (soldering 10 s) |  |  |  | 260 | °C | soldering 10 s | 3 |
| ESD capability (human body model) |  |  |  | 2 | kV | human body model | 3 |
| Recommended operating junction temperature |  | -40 |  | 125 | °C |  | 3 |
| Quiescent current | IQ | 240 | 300 | 400 | μA | 100% PWM | 3 |
| Standby quiescent current | ISTB | 44 | 54 | 72 | μA | PWM=0 | 3 |
| Reference voltage 1 | VREF1 | 630 | 650 | 670 | mV | 100% duty | 3 |
| Reference voltage 2 | VREF2 | 16.5 | 19.5 | 22.5 | mV | 3% duty | 3 |
| Dimming frequency | fDIM | 540 | 600 | 660 | Hz |  | 4 |
| Over-temperature protection point | TOTP | 146 | 150 | 154 | °C |  | 4 |
| VIN start-up voltage | VIN_ON |  | 8 |  | V |  | 3 |
| VIN shut-off voltage | VIN_OFF |  | 7.7 |  | V |  | 3 |
| PWM signal high level | VPWMH |  | 2.5 |  | V |  | 3 |
| PWM signal low level | VPWML |  | 0.5 |  | V |  | 3 |
| Dimming-off delay | TDIM_off |  | 6 |  | ms |  | 3 |
| DIM on minimum pulse width | PWon |  | 1 |  | μs |  | 4 |
| High-voltage MOSFET breakdown voltage | VBR |  | 500 |  | V | Id=250μA | 4 |
| MOSFET saturation current | ISAT |  | 120 |  | mA |  | 4 |
| Junction-to-ambient thermal resistance |  |  | 65 |  | °C/W |  | 3 |

## CAD (KiCad official)

- Symbol: `KP18055ESPA`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `kp18055espa-etched.step` / `kp18055espa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kp18055espa.step` / `kp18055espa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Kiwi Instruments datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903029068476416) (5 pp, sha256 `150a676fd2f47398`, retrieved 2026-10-18, 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 0.3`, 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/kp18055espa-datasheet.pdf)