component
LGS4056HEP
Public Made by Adomby adom
Legend Si Battery Management, ESOP-8. Datasheet-verified pinout, 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
markdownLGS4056HEP
Legend Si · Battery Management · ESOP-8
LGS4056HEP from Legend Si, in a ESOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TEMP | input | Battery temperature detection input; charging pauses if voltage is below 45% VCC (over-temperature) or above 80% VCC (under-temperature); ground to disable monitoring. |
| 2 | PROG | input | Charging current programming input; set charging current with external 1% precision resistor to ground where I_BAT = 1000/R_PROG above 300mA or I_BAT = 900/R_PROG below 300mA. |
| 3 | GND | power_in | Chip ground. |
| 4 | VCC | power_in | Power supply input rated 5V nominal; requires minimum 10µF ceramic bypass capacitor to GND; withstands surge voltage up to 28V with internal 24V MOSFET. |
| 5 | BAT | power_out | Battery charging output with maximum programmable charging current to 1A; requires minimum 10µF capacitor to ground. |
| 6 | DONE | tri_state | Charging complete indicator; open-drain output pulls low when battery reaches full charge voltage of 4.2V. |
| 7 | CHRG | tri_state | Charging in progress indicator; open-drain output pulls low during constant current and constant voltage charging phases. |
| 8 | CE | input | Charging enable control input; high level enables charging, low level disables charging and reduces quiescent current to ≤40µA. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Legend Si |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |
CAD (KiCad official)
- Symbol:
LGS4056HEP - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
lgs4056hep-etched.step/lgs4056hep-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lgs4056hep.step/lgs4056hep.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Legend Si datasheet (16 pp, sha256
ca42b5598b7bb228, retrieved 2026-09-18, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).