TX6143

@@ -0,0 +1,41 @@+# TX6143++**XDS** · LED Drivers · SOT-89-5++TX6143 from XDS, 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 | Switch node - drain of the internal 60V power MOSFET (RDSon ~300 mΩ, max 1.2A). Connects to the inductor / freewheel Schottky cathode in the buck topology. |+| 2 | VSS | power_in | Chip ground / return for internal MOSFET source and control circuitry. |+| 3 | DIM | input | Brightness/dimming control input. Accepts PWM (up to 20 kHz) or analog (0.5V-2.5V) dimming; VIH ≥ 2.5V, VIL ≤ 0.3V. Internal ~500 kΩ pull-up to a 5V internal LDO - leave floating if dimming is not used. VDIM absolute-max is 6V. Output shuts off (standby) when DIM < 0.3V. |+| 4 | CS | input | High-side current-sense input. External sense resistor RCS between VIN and CS sets the LED current: ILED ≈ 0.2V / RCS. Hysteretic thresholds are 240 mV (peak) and 160 mV (valley) across VIN-CS. Input bias ~10 µA. |+| 5 | VIN | power_in | Main supply input, 5.5V to 60V operating (68V absolute max). UVLO rising ≈ 5.1V with 0.4V hysteresis. Bypass with 47-100 µF bulk capacitor rated above max VIN. Standby current ~320 µA at 12V when DIM=0. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | XDS |+| Package | SOT-89-5 |+| Category | LED-drv |+| Pins | 5 |++## CAD (KiCad official)++- Symbol: `TX6143`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [XDS datasheet](docs/tx6143-datasheet.pdf) (10 pp, sha256 `3379b085ea49eafe`, 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](docs/tx6143-datasheet.pdf)

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