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DX1246
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
markdownDX1246
Dersem · LED Drivers · ESOP-8
DX1246 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 | DIM | input | PWM dimming input that supports PWM above 20 kHz with better than 1000:1 resolution, is internally pulled up by 100uA when left floating, and puts the chip into sleep mode after being held low for more than 120 ms (absolute maximum VDIM -0.3 to 6.0 V). |
| 2 | NC | unconnected | No internal connection; the datasheet specifies this pin is left floating (悬空). |
| 3 | CS1 | input | Output current sense pin 1, where the LED current is set by an external sense resistor using IOUT = 0.137 / Rcs and the CS pin voltage is rated -0.3 to 6 V absolute maximum. |
| 4 | CS2 | input | Output current sense pin 2, which is part of the same current-sense connection as CS1, with the same 0.137 / Rcs current setting and -0.3 to 6 V absolute maximum rating on the CS port. |
| 5 | VDDO | power_out | 5 V supply pin, with the datasheet listing VDDO at 5.6 V in the electrical table; the datasheet states the external PWM-controller supply function applies only to DX1240 and DX12410, not to DX1246. |
| 6 | DRAIN | output | LED driver pin connected to the internal NMOS drain that sinks the LED current, with the output voltage rated -0.3 to 60 V for the DX1246 variant. |
| 7 | VIN | power_in | Chip supply input with an operating range of 2.5 to 40 V (electrical table lists 3.0 to 40 V) and an absolute maximum of -0.3 to 46 V, where the datasheet recommends a clamp from VIN to GND when VIN exceeds 36 V. |
| 8 | GND | power_in | Chip ground reference pin. |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN 芯片工作电源 (supply voltage) | VIN | -0.3 | 46 | V | 3 | ||
| VIOUT 恒流输出端口耐压 (DX1246) | VIOUT | -0.3 | 60 | V | DX1246 variant | 3 | |
| VDIM PWM 输入电压 | VDIM | -0.3 | 6 | V | 3 | ||
| VCS CS 端口耐压 | VCS | -0.3 | 6 | V | 3 | ||
| VDRV DRV 端口耐压 | VDRV | -0.3 | 6 | V | 3 | ||
| VDD VDD 端口耐压 | VDD | -0.3 | 6 | V | 3 | ||
| TSTG 存储温度 | TSTG | -40 | 150 | ℃ | 3 | ||
| TA 工作温度 | TA | -40 | 125 | ℃ | 3 | ||
| VESD HBM 人体放电模式 | VESD | 2 | KV | HBM; printed as '>2 KV' | 3 | ||
| VIN 输入电压范围 (VIN voltage range) | VIN | 3 | 40 | V | 4 | ||
| VCS 恒流调节电压 (LED current-sense regulation voltage) | VCS | 132 | 137 | 142 | mV | VCC＝5V | 4 |
| IOUT 输出电流 (output current) | IOUT | 2 | A | 4 |
CAD (KiCad official)
- Symbol:
DX1246 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
dx1246-etched.step/dx1246-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);dx1246.step/dx1246.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).