component
PT4115
Public Unreviewedby Ray
UMW LED Drivers, SOT-89-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownPT4115
UMW · LED Drivers · SOT-89-5
PT4115 from UMW, in a SOT-89-5. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SW | output | Drain of the internal high-side power MOSFET. Connects to the switching node between the inductor and the Schottky freewheeling diode. Rated -0.3 V to 35 V; on-resistance ~0.4 Ω at V_IN=24 V, ~0.6 Ω at V_IN=12 V; continuous current up to 1.2 A (absolute max 1.5 A). |
| 2 | GND | power_in | Device ground return for the power stage and internal control circuitry. Should be tied to the input bypass-capacitor return and the exposed pad using a star-ground layout. |
| 3 | DIM | input | Multiplexed dimming / enable input. V_DIM < 0.3 V shuts the part down (I_Q ≈ 60 µA); 0.5 V ≤ V_DIM ≤ 2.5 V provides linear analog dimming; V_DIM ≥ 2.5 V (up to 5 V) gives full LED current. Also accepts PWM up to ~20 kHz (max 50 kHz) for PWM dimming. Internally pulled up to a ~5 V rail through ~200 kΩ, so it may be left floating for full-current operation. |
| 4 | CSN | input | Current-sense negative input. The external sense resistor R_S (≥ 0.082 Ω) is connected between VIN and CSN; the internal comparator regulates the average LED current to I_OUT = 0.1 / R_S with a ±5% accuracy (V_CSN threshold ≈ 100 mV, ±15% hysteresis). Rated 0.3 V to -6 V relative to VIN. |
| 5 | VIN | power_in | Main supply input, 6 V to 30 V recommended (absolute max 35 V, UVLO ≈ 5.1 V rising, 500 mV hysteresis). A low-ESR bypass capacitor (≥ 4.7 µF X5R/X7R) must be placed close to this pin. |
| EP | Exposed PAD | passive | Exposed thermal pad on the underside of the SOT89-5 package. Provides the primary heat-dissipation path (θJA ≈ 45 °C/W) and is internally connected to ground. Must be soldered to a PCB copper plane and tied to the GND net. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-89-5 |
| Category | LED-drv |
| Pins | 6 |
Ordering variants
Same part, different packaging or reel option.
PT4115UMW PT4115
CAD (KiCad official)
- Symbol:
PT4115 - Footprint:
Package_TO_SOT_SMD:SOT-89-5 - 3D model: SOT-89-5 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
pt4115.step |
86 KB | You want the bare part, or you mark your own boards. |
pt4115-etched.step |
778 KB | You want the part with PT4115 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 210 faces against 26 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (13 pp, sha256
2ea86371f0e7219c, retrieved 2026-08-17, tier: lcsc) - 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).