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EG1256

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EG Micro AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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EG1256

EG Micro · AC-DC Controllers And Regulators · SOP-8

EG1256 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 whose voltage, together with the current-sense signal, sets the PWM duty cycle; the datasheet gives an open-circuit voltage of 4.4 V and a short-circuit current of 0.8 mA when FB is grounded.
2 CC passive Constant-current setting pin: an external resistor sets the CC output current, roughly (VCC-2V)/RCC, and leaving CC floating disables the constant-current control function.
3 CS input Current-sense pin that monitors the voltage across the sense resistor for cycle-by-cycle current limiting, with a 0.8 V current-limit threshold (Vcs1) and a 1 V over-current threshold (Vcs2) and an 80 ns leading-edge blanking time.
4 RI passive Frequency-setting pin: a resistor from RI to GND sets the PWM switching frequency by Fosc(kHz)=4300/RI(kΩ), with the datasheet's typical design point at RI=43 kΩ.
5 GND power_in Chip ground pin for the controller.
6 OUT output Gate-drive output that drives the gate of the external power MOSFET, with output voltage clamped to 17 V maximum when VCC exceeds 20 V and a source/sink capability of 0.5 A / 0.8 A (pulse width ≤10 µs).
7 VCC power_in Power supply pin with an absolute maximum rating of 32 V, a 38 V zener clamp at 10 mA, and UVLO thresholds of 14 V (turn-on) and 9 V (turn-off).
8 SS passive Soft-start pin where an external capacitor is charged by an internal 10 µA constant current source, and soft-start is complete when the SS voltage reaches 3.5 V.

Key specifications

Parameter Value
Manufacturer EG Micro
Package SOP-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: EG1256
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: eg1256-etched.step / eg1256-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); eg1256.step / eg1256.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: EG Micro datasheet (11 pp, sha256 62776cc5a8bbb949, 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF