component
FM4115K.
Public Made by Adomby adom
Shenzhen Fuman LED Drivers, SOT-89-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownFM4115K.
Shenzhen Fuman · LED Drivers · SOT-89-5
FM4115K. from Shenzhen Fuman, in a SOT-89-5. 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 | SW | output | Drain of the internal power switch, rated -0.3 to 45 V, with 1.5 A maximum switch output current and 1.2 A continuous (ISWmean); keep the SW trace as short as possible. |
| 2 | GND | power_in | Common ground for signal and power; it should be kept well grounded and the datasheet asks for a large copper contact area with the thermal PAD. |
| 3 | DIM | input | Switch enable, analog and PWM dimming input: below 0.3 V turns the LED current off, 2.5 V or above gives full LED current, and the absolute maximum rating is -0.3 to 6 V. |
| 4 | CSN | input | Current-sense input, with the sense resistor connected between CSN and VIN; the rating is +0.3 to -6.0 V relative to VIN, and the sense voltage is 100 mV typical (95 to 105 mV). |
| 5 | VIN | power_in | Supply input with an operating range of 6 V to 30 V and an absolute maximum of -0.3 to 45 V, which must be bypassed by a low-ESR capacitor (minimum 4.7 uF for DC input) placed close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | SOT-89-5 |
| Category | LED Drivers |
| Pins | 5 |
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 supply voltage (absolute maximum) | VIN | -0.3 | 45 | V | 2 | ||
| SW power switch drain voltage (absolute maximum) | SW | -0.3 | 45 | V | 2 | ||
| CSN current-sense pin voltage (absolute maximum) | CSN | -6 | 0.3 | V | relative to VIN | 2 | |
| DIM enable/analog/PWM dimming pin voltage (absolute maximum) | DIM | -0.3 | 6 | V | 2 | ||
| Power switch output current (absolute maximum) | ISW | 1.5 | A | 2 | |||
| Power dissipation | PDMAX | 1.5 | W | see note 2 | 2 | ||
| Operating junction temperature range | TJ | -40 | 150 | ℃ | 2 | ||
| Storage temperature range | TSTG | -55 | 150 | ℃ | 2 | ||
| Supply voltage (recommended operating) | VIN | 0 | 30 | V | 3 | ||
| Operating temperature (recommended operating) | TOPT | -40 | 85 | ℃ | 3 | ||
| Input voltage | VIN | 6 | 30 | V | 3 | ||
| Current-sense voltage | VCSN | 95 | 100 | 105 | mV | VIN-VCSN | 3 |
| Current-sense voltage hysteresis | VCSN_hys | -15 | 15 | % | 3 | ||
| DIM input high level | VDIM_H | 2.5 | V | 3 | |||
| DIM input low level | VDIM_L | 0.3 | V | 3 | |||
| Analog dimming voltage range | VDIM_DC | 0.5 | 2.5 | V | 3 | ||
| Maximum PWM dimming frequency | fDIM | 50 | KHz | Fosc=500KHz | 3 | ||
| Low-frequency PWM dimming duty cycle | DPWM_LF | 0.02 | 1 | % | fDIM=100Hz | 3 | |
| High-frequency PWM dimming duty cycle | DPWM_HF | 4 | 1 | % | fDIM=20Hz | 3 | |
| Maximum switching frequency | FSW | 1 | MHz | 3 | |||
| Shutdown current | IOFF | 100 | uA | VDM<0.3V | 3 | ||
| DIM pin input leakage current | IDIM_L | 35 | uA | VDIM=0 | 4 | ||
| Power switch continuous current | ISWmean | 1.2 | A | 4 | |||
| Switch leakage current | ILEAK | 0.5 | 5 | uA | 4 | ||
| Under-voltage lockout threshold | VUVLO | 5.1 | V | VIN falling | 3 | ||
| Under-voltage lockout hysteresis | VUVLO,HYS | 500 | mV | VIN rising | 3 | ||
| CSN pin input current | ICSN | 6.5 | uA | VIN-VCSN=50mV | 3 | ||
| Internal circuit operating voltage | VDIM | 5.3 | V | DIM floating | 3 | ||
| DIM pull-up resistance to internal operating voltage | RDIM | 150 | K | 4 | |||
| SW on-resistance | RSW | 0.5 | Ω | VIN=24V | 4 | ||
| SW on-resistance | RSW | 0.7 | Ω | VIN=12V | 4 | ||
| Overtemperature protection threshold | TSD | 160 | ℃ | 4 | |||
| Overtemperature protection hysteresis | TSD-hys | 20 | ℃ | 4 | |||
| Thermal resistance, SOT89-5 junction to ambient | θJA | 45 | ℃/W | SOT89-5 | 2 |
CAD (KiCad official)
- Symbol:
FM4115K. - Footprint:
Package_TO_SOT_SMD:SOT-89-5 - 3D model: SOT-89-5 (KiCad packages3D, STEP)
- 3D model files:
fm4115k-etched.step/fm4115k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);fm4115k.step/fm4115k.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen Fuman datasheet (16 pp, sha256
31f5b2bfb75ddd74, retrieved 2026-10-19, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).