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DX1248
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
markdownDX1248
Dersem · LED Drivers · ESOP-8
DX1248 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 with an internal 100uA pull-up that defaults high when floating; output turns off when low and the chip enters sleep after low for more than 120 ms, with an absolute maximum of -0.3 to 6.0 V. |
| 2 | NC | unconnected | No internal connection; the datasheet specifies this pin as floating (suspended). |
| 3 | CS1 | input | Output current sense input 1, where the output current is set by the sense resistor as IOUT = 0.137 / Rcs with VCS regulated at 132-142 mV (137 mV typical) and an absolute maximum of -0.3 to 6 V. |
| 4 | CS2 | input | Output current sense input 2, used with the same sense-voltage regulation of 132-142 mV (137 mV typical) and absolute maximum of -0.3 to 6 V as CS1. |
| 5 | VDDO | power_out | 5 V supply pin intended to power an external PWM control chip, with the absolute maximum VDD rating of -0.3 to 6 V; the text limits this VDDO function to DX1240 and DX12410. |
| 6 | DRAIN | output | LED drive pin connected to the internal NMOS drain that sinks the LED current, with the DX1248 absolute drain-voltage limit not printed in the rating table (the ordering table lists 80 V for DX1248). |
| 7 | VIN | power_in | Supply input with a 2.5-40 V operating range per the features list and an absolute maximum of -0.3 to 46 V; a clamp diode to GND is recommended above 36 V. |
| 8 | GND | power_in | Chip ground reference for the device. |
| 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 |
CAD (KiCad official)
- Symbol:
DX1248 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
dx1248-etched.step/dx1248-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);dx1248.step/dx1248.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Dersem datasheet (9 pp, sha256
dcd1102efc9dac6e, retrieved 2026-10-09, 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).