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DX2281E

Public Made by Adom

by adom

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

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DX2281E

Dersem · LED Drivers · ESOP-8

DX2281E from Dersem, in a ESOP-8. 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 VIN power_in Supply input pin; the VIN port is rated -0.5 to 500 V (absolute maximum) with a 500 V breakdown minimum, and quiescent current is 0.1 to 0.4 mA at VIN = 10 V.
2 NC unconnected No-connect pin, left floating (datasheet lists it as a suspended pin).
3 GND power_in Chip ground reference pin.
4 DIM input PWM dimming input with a logic-high threshold of 2 V minimum and logic-low threshold of 1.5 V maximum, absolute maximum -0.5 to 8 V, and OUT is off by default when DIM is left floating.
5 REXT passive Output-current setting pin where IOUT = 0.6 V / R_EXT, with REXT voltage of 0.57 to 0.63 V (typ. 0.60 V) and absolute maximum -0.5 to 8 V.
6 NC unconnected No-connect pin, left floating (datasheet lists it as a suspended pin).
7 NC unconnected No-connect pin, left floating (datasheet lists it as a suspended pin).
8 OUT output Constant-current output to the LED string, rated 5 to 120 mA with an OUT port voltage rating of 500 V, and a constant-current knee (VOUT_MIN) of 6.5 V maximum at 30 mA.
9 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Dersem
Package ESOP-8
Category LED Drivers
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
恒流拐点 (OUT 端口电压下限) VOUT_MIN 6.5 V IOUT = 30mA 3
OUT 端口耐压 VOUT_BV 500 V 3
VIN 端口耐压 VIN_BV 500 V 3
OUT 输出电流 IOUT 5 120 mA 3
静态电流 IDD 0.1 0.25 0.4 mA VIN=10V 3
REXT 端口电压 VREXT 0.57 0.6 0.63 V VIN=10V，VOUT=10V 3
DIM 端口下拉电流 I_DIM 18 85 uA DIM=5V 3
输入信号阈值电压 DIM (高电平) VIH 2 5.6 V 3
输入信号阈值电压 DIM (低电平) VIL 0 1.5 V 3
调光范围 I_DDIM 0 100 % 3
调光频率范围 FOSC 1 20 KHz 3
IOUT 片间偏差 (printed ±5%) DIOUT -5 5 % IOUT=30mA 3
电流负温度补偿起始点 TSC 130 °C 3
VIN 端口电压 VIN -0.5 500 V 3
OUT 端口电压 VOUT -0.5 500 V 3
DIM 端口电压 VDIM -0.5 8 V 3
REXT 端口电压 VREXT -0.5 8 V 3
功耗 PD 1.25 W 3
工作结温范围 TJ -40 150 °C 3
存储温度 TSTG -55 150 °C 3
HBM 人体放电模式 ESD VESD 2 KV HBM 3
PN 结到环境的热阻 RθJA 65 °C/W TA=25°C 自然对流，JEDEC JESD51 单层导热试验板 (注 2) 3

CAD (KiCad official)

  • Symbol: DX2281E
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: dx2281e-etched.step / dx2281e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dx2281e.step / dx2281e.glb are the bare package body.

Provenance

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

  • Datasheet: Dersem datasheet (10 pp, sha256 b8e8c9b747c19a79, retrieved 2026-10-16, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF