component

PT4115-TD

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by Ray

TDSEMIC LED Drivers, SOT-89-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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PT4115-TD

TDSEMIC · LED Drivers · SOT-89-5

PT4115-TD from TDSEMIC, in a SOT-89-5. 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 SW output Drain of the internal high-side power MOSFET (Rsw ~0.4-0.6 Ω). Connects to the switching node - inductor and freewheel diode. Absolute max -0.3 to +45 V.
2 GND power_in Signal and power ground reference for the device.
3 DIM input Multi-function switch enable / analog dimming / PWM dimming input. VDIM < 0.3 V shuts the power switch off (IOFF ~60 µA standby). Analog dimming range 0.5-2.5 V; VDIM-H ≥ 2.5 V, VDIM-L ≤ 0.3 V; PWM up to 50 kHz. Internally pulled up ~1.2 MΩ to 5 V rail. Absolute max -0.3 to +6 V.
4 CSN input Current-sense input. Sense resistor connects between CSN and VIN; regulated average sense voltage (VIN-VCSN) = 100 mV typ (95/105 mV min/max), ±15% hysteresis. ICSN ~8 µA at 50 mV sense. Absolute max +0.3 to -6 V relative to VIN.
5 VIN power_in Supply input, 8-40 V recommended (absolute max -0.3 to +45 V). Requires a bypass capacitor placed as close as possible to the pin. UVLO threshold 6.8 V typ with 500 mV hysteresis.
EP Exposed_PAD power_in Thermal pad, internally connected to GND. Solder to PCB ground plane to reduce thermal resistance (θJA 45 °C/W for SOT89-5). Present on SOT89-5 only.

Key specifications

Parameter Value
Manufacturer TDSEMIC
Package SOT-89-5
Category LED Drivers
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • PT4115-TD

CAD (KiCad official)

  • Symbol: PT4115-TD
  • Footprint: Package_TO_SOT_SMD:SOT-89-5
  • 3D model: SOT-89-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: TDSEMIC datasheet (14 pp, sha256 9c9cc8e40d2478d8, 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