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DX2281E
Public Made by Adomby adom
Dersem LED Drivers, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownDX2281E
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);dx2281e.step/dx2281e.glbare 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, 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).