component
EG1242
Public Made by Adomby adom
EG Micro AC-DC Controllers And Regulators, SOP-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
markdownEG1242
EG Micro · AC-DC Controllers And Regulators · SOP-8
EG1242 from EG Micro, in a SOP-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 | FB | input | Feedback pin: the PWM duty cycle is set by the voltage on this pin together with the current-sense signal; datasheet gives FB open-circuit voltage 5.3 V, short-circuit current 1.2 mA (FB to GND), and overload threshold Vth_OLP 4.6 V. |
| 2 | nc | unconnected | No connection; the pin is left floating (marked 悬空 'floating' in the pin table). |
| 3 | CS | input | Current-sense pin: the voltage across the external sense resistor is monitored for cycle-by-cycle over-current protection, with a current-limit threshold Vcs(max) of 0.9 V min, 1 V typical, 1.1 V max. |
| 4 | RI | passive | Frequency-set pin: a resistor from RI to GND sets the switching frequency per Fosc(KHz)=1485/RI(KΩ), with RI open-circuit voltage 2 V and the test condition RI=27 kΩ; the chip also applies frequency dithering of ±4%. |
| 5 | GND | power_in | Chip ground reference for the controller. |
| 6 | OUT | output | Gate-drive output that drives the power MOSFET gate; datasheet limits are VOL 0.3 V max at 20 mA sink, VOH 13 V at 20 mA source, and OUT maximum rating VCC+0.3 V. |
| 7 | VCC | power_in | Supply pin: absolute maximum VCC is 30 V, UVLO turn-on 15-17 V and turn-off 9.5-11.5 V, overvoltage protection 27.2-29.2 V, and VCC clamp 31-33 V at 10 mA (clamp current max 10 mA). |
| 8 | RT | input | Over-temperature protection pin: an external NTC thermistor to GND sets the trip point, with an internal 80 µA source current; the protection trips when RT falls to 1 V and releases when RT rises above 1.1 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | EG Micro |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
EG1242 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
eg1242-etched.step/eg1242-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);eg1242.step/eg1242.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: EG Micro datasheet (11 pp, sha256
b925eee78bcb0743, 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).