component
DX1240
Public Made by Adomby adom
Dersem LED Drivers, SOT-23-6. 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
markdownDX1240
Dersem · LED Drivers · SOT-23-6
DX1240 from Dersem, in a SOT-23-6. 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 | CS | input | Output current sense pin; the LED current is set by the external sense resistor as IOUT = 0.137 / Rcs, with CS regulation voltage 132-142 mV (typ. 137 mV) at VCC = 5 V and a CS pin rating of -0.3 to 6 V. |
| 2 | GND | power_in | Chip ground reference. |
| 3 | VIN | power_in | Supply input; the features list an operating range of 2.5-40 V, the electrical table gives a minimum of 3.0 V, and the absolute maximum rating is -0.3 to 46 V. |
| 4 | VDDO | power_out | 5 V auxiliary supply output that can power an external PWM controller (DX1240 only); the VDD pin rating is -0.3 to 6 V. |
| 5 | DRV | output | NMOS gate drive output for the external MOSFET; the DRV pin rating is -0.3 to 6 V. |
| 6 | DIM | input | PWM dimming input with internal 100 uA pull-up (defaults high when floating); PWM input rating is -0.3 to 6.0 V, the rising threshold is 0.5VDD and the falling threshold is 0.3VDD, and holding it low for more than 120 ms puts the chip into sleep mode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Dersem |
| Package | SOT-23-6 |
| Category | LED Drivers |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VIN 电压范围 | VIN | 3 | 40 | V | 4 | ||
| 恒流调节电压 | VCS | 132 | 137 | 142 | mV | VCC＝5V | 4 |
| 输出电流 | IOUT | 2 | A | 4 | |||
| VIN 芯片工作电源 (absolute max) | VIN | -0.3 | 46 | V | 3 | ||
| PWM 输入电压 (absolute max) | VDIM | -0.3 | 6 | V | 3 | ||
| CS 端口耐压 (absolute max) | VCS | -0.3 | 6 | V | 3 | ||
| DRV 端口耐压 (absolute max) | VDRV | -0.3 | 6 | V | 3 | ||
| VDD 端口耐压 (absolute max) | VDD | -0.3 | 6 | V | 3 | ||
| 存储温度 | TSTG | -40 | 150 | ℃ | 3 | ||
| 工作温度 | TA | -40 | 125 | ℃ | 3 | ||
| HBM 人体放电模式 ESD | VESD | 2 | KV | HBM 人体放电模式 | 3 | ||
| 建议电流范围 下限 | 17 | mA | 2 | ||||
| 建议电流范围 上限 | 2 | A | 2 | ||||
| 工作电流 | IDD | 0.7 | mA | VIN＝5V | 4 | ||
| 休眠待机电流 | Istandby | 85 | uA | VIN=4V | 4 | ||
| VDDO 电压 | VDDO | 5.6 | V | 4 | |||
| 恒流拐点 | V_IOUT | 200 | mV | IOUT=1A | 4 | ||
| 最高结温 (过温降电流) | TjMAX | 135 | ℃ | 过温降电流的方式 | 4 |
CAD (KiCad official)
- Symbol:
DX1240 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
dx1240-etched.step/dx1240-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);dx1240.step/dx1240.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Dersem datasheet (9 pp, sha256
dcd1102efc9dac6e, retrieved 2026-10-18, 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).