component

DIO8280AXS8

Public Made by Adom

by adom

DIOO LED Drivers, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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DIO8280AXS8

DIOO · LED Drivers · SOP-8-EP

DIO8280AXS8 from DIOO, in a SOP-8-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 SENN input Negative current sense pin; the current sense limit across SEN-SENN is 200mV typical and the pin is rated -0.3 to 90V.
2 EN input Enable and PWM dimming input pin, with turn-on threshold 1.28V, turn-off threshold 0.56V, and rated -0.3 to 90V.
3 CF input Connect a capacitor to ground to filter AC ripple on the reference voltage, or apply 0~1.2V directly for linear dimming.
4 GND power_in Ground pin.
5 LX passive Power MOSFET drain pin connected to the inductor node, rated -0.3 to 90V.
6 LX passive Power MOSFET drain pin connected to the inductor node, rated -0.3 to 90V.
7 VIN power_in Input supply pin, 16 to 85V recommended, to be decoupled to GND with a ceramic capacitor.
8 SEN input Positive current sense pin, rated -0.3 to 90V; PWM is disabled if VSEN-VSENN is 0.3V or more.
9 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer DIOO
Package SOP-8-EP
Category Nixie Tube Driver/LED Driver
Pins 9

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage Range VIN 16 85 V VIN = 24V, VOUT = 12V, IOUT = 100mA, TA = 25°C 4
Shutdown Current IDN 10 μA EN=0 4
Current Sense Limit VSEN-SENN 196 200 204 mV 4
Power MOSFET ON Resistance RDSON 200 mΩ 4
Power MOSFET Current Limit ILIMIT 2.8 A 4
Switching Frequency FSW 400 kHz 4
EN turn-on Threshold VENH 1.28 V 4
EN turn-off Threshold VENL 0.56 V 4
VIN turn-on threshold VIN,ON 7.4 V 4
VIN turn-off threshold VVIN,OFF 6.8 V 4
Analog dimming range on CF VCF 120 mV ILED=10% 4
Analog dimming range on CF VCF 1.2 V ILED=100% 4
Thermal Shutdown Temperature TSD 150 °C 4
Thermal Hysteresis Hyst 30 °C 4
Abs max LX, VIN, EN, SEN, SENN -0.3 90 V 3
Abs max all other pins -0.3 5.5 V 3
Power Dissipation PD 3.3 W TA=25°C 3
Junction Temperature Range (abs max) -40 150 °C 3
Lead Temperature 260 °C 3
Storage Temperature Range -65 150 °C 3
Recommended VIN, LX, EN, SEN, SENN 16 85 V 3
Recommended all other pins 0 5 V 3
Recommended Junction Temperature Range -40 125 °C 3
Thermal Resistance Junction-to-Ambient ΘJA 30 °C/W 3
Thermal Resistance Junction-to-Case ΘJC 10 °C/W 3

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 problems, we should place the following components close to the IC: CVIN, L, COUT, CF and RCS. 1) It is desirable to maximize the PCB copper area connecting to GND pin to achieve the best thermal and 7

CAD (KiCad official)

  • Symbol: DIO8280AXS8
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
  • 3D model: SOP-8-EP (KiCad packages3D, STEP)
  • 3D model files: dio8280axs8-etched.step / dio8280axs8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dio8280axs8.step / dio8280axs8.glb are the bare package body.

Provenance

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

  • Datasheet: DIOO datasheet (9 pp, sha256 d266813ec5191a25, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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).

Datasheet PDF