# FL7701MX

**onsemi** · LED Drivers · SOIC-8

FL7701MX from onsemi, in a SOIC-8. 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 | CS | input | Current sense pin that limits the output current via the sense-resistor voltage and is also used to set LED current regulation; maximum allowed sense voltage is 5 V. |
| 2 | OUT | output | Gate drive output connected to the MOSFET gate, with peak source/sink drive current of 250 mA maximum. |
| 3 | VCC | power_in | Supply pin for stable IC operation, also used for ZCD signal detection for accurate PFC function; absolute maximum 20 V. |
| 4 | RT | input | Sets the operating frequency through an external resistor; with the pin open or floating the IC runs at a preset fixed frequency, maximum 5 V. |
| 5 | ADIM | input | Analog dimming pin tied to an internal current source so an external resistor can change the output current; if unused, connect a 0.1 µF bypass capacitor between ADIM and GND; maximum 5 V. |
| 6 | GND | power_in | Ground of the integrated circuit. |
| 7 | NC | unconnected | No connection. |
| 8 | HV | input | High-voltage pin connected to the high-voltage line to supply current to the IC; absolute maximum 500 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-8 |
| Category | Display Modules / LED Drivers / Display Drivers |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `FL7701MX`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `fl7701mx-etched.step` / `fl7701mx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fl7701mx.step` / `fl7701mx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/fl7701mx-d.pdf) (12 pp, sha256 `7ea1f2b9170135dc`, retrieved 2026-10-27, tier: manufacturer)
- **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-sonnet-5-5` (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/fl7701mx-datasheet.pdf)