component
A6271KLPTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC LED Drivers, TSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 5d ago |
| viewers | 5d ago |
| a6271klptr-t-etched.glb | 5d ago |
| a6271klptr-t-etched.step | 5d ago |
| a6271klptr-t-hero.glb | 5d ago |
| a6271klptr-t-hero.overlay.json | 5d ago |
| a6271klptr-t.glb | 5d ago |
| a6271klptr-t.kicad_mod | 5d ago |
| a6271klptr-t.kicad_sym | 5d ago |
| a6271klptr-t.lbr | 5d ago |
| a6271klptr-t.step | 5d ago |
| package.json | 5d ago |
| page.json | 5d ago |
| README.md | 5d ago |
A6271KLPTR-T
Allegro MicroSystems, LLC · LED Drivers · TSSOP-16-EP
A6271KLPTR-T from Allegro MicroSystems, LLC, in a TSSOP-16-EP. 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 | COMP | passive | Compensation pin for output of GM error amplifier. |
| 2 | IREF | input | Analog dimming input; a capacitor on this pin provides a soft-start period when coming out of sleep mode. |
| 3 | FAULTn | output | Open drain output; logic low indicates detection of a fault such as LED overload, output undervoltage or overvoltage, input supply undervoltage, or VREG undervoltage. |
| 4 | OSC | input | Oscillator input for setting switching frequency and for external synchronization. |
| 5 | DITH | passive | Dither frequency range set; connect a resistor from this pin to GND, or connect to VREG if not used. |
| 6 | DR | input | A voltage applied to this pin programs the duty cycle of PWM internal mode. |
| 7 | PWMIN | input | Used for putting the device into sleep mode or analog dimming control, and can also be used for external or internal PWM control. |
| 8 | VREG | power_out | 5 V regulator output; connect a filter capacitor from VREG to GND. |
| 9 | SG | output | Switch gate drive output. |
| 10 | SP | input | Switch current sense and slope compensation input. |
| 11 | GND | power_in | Ground. |
| 12 | OVUV | input | Programmable-output overvoltage and undervoltage protection input. |
| 13 | PWMOUT | output | PWM gate drive for external p-channel MOSFET, active low. |
| 14 | LN | input | LED current sense negative input. |
| 15 | LP | input | LED current sense positive input. |
| 16 | VIN | power_in | Main supply input; absolute maximum rating is -0.3 to 55 V with respect to GND. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems, LLC |
| Package | TSSOP-16-EP |
| Category | Nixie Tube Driver/LED Driver |
| Pins | 17 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | The drain connection of the switching MOSFET, PWM MOSFET, and cathode terminal of the recirculation diode are used for thermal heatsinking. It is advised to use sufficient copper around | 20 |
CAD (KiCad official)
- Symbol:
A6271KLPTR-T - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: TSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
a6271klptr-t-etched.step/a6271klptr-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a6271klptr-t.step/a6271klptr-t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Allegro MicroSystems, LLC datasheet (37 pp, sha256
054f63abc640cd41, retrieved 2026-10-28, tier: lcsc) - 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).