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GX4056
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GUOXIN JIAPIN SEMICONDUCTOR Battery Management, 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
markdownGX4056
GUOXIN JIAPIN SEMICONDUCTOR · Battery Management · ESOP-8
GX4056 from GUOXIN JIAPIN SEMICONDUCTOR, 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 | NC | unconnected | Empty (no-connect) pin per the pin definition table; not used. |
| 2 | PROG | passive | Charge-current setting pin: a resistor from PROG to GND sets the charge current by IBAT = 1000V / RPROG (RPROG must be at least 1 kΩ per note 1), PROG is regulated to 1.0 V in constant-current mode and 0.1 V in trickle charge, and its absolute-maximum voltage is -0.3 to 0.3 V. |
| 3 | GND | power_in | Power ground for the charger. |
| 4 | VCC | power_in | Charger input supply: charging starts only when VCC exceeds the 3.7 V typical undervoltage lockout threshold and is at least 100 mV above VBAT; operating range 4.5 V to 6.5 V, absolute maximum -0.3 V to 8 V. |
| 5 | VBAT | power_out | Battery positive terminal that delivers the charge current and the 4.2 V float voltage; absolute maximum -0.3 V to 8 V, and it floats to about 4.6 V when no battery is connected. |
| 6 | STDBY | output | Open-drain charge-complete indicator that is pulled low (LED on) when charging is finished; absolute maximum -0.3 V to 8 V. |
| 7 | CHRG | output | Open-drain charge-status indicator that is pulled low by an internal switch while charging and goes high-impedance when charging ends; output low voltage 0.6 V max at 5 mA, absolute maximum -0.3 V to 8 V. |
| 8 | NC | unconnected | Empty (no-connect) pin per the pin definition table; not used. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GUOXIN JIAPIN SEMICONDUCTOR |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| 输入电源电压 | VCC | 4.5 | 5 | 6.5 | V | 4 | |
| 恒流充电电流 | IC | 950 | 1000 | 1050 | mA | RPROG=1K，电流模式 | 4 |
| 涓流充电电流 | ITRIKL | 40 | 60 | 80 | mA | VBAT＜VTRIKL,RPROG=1K | 4 |
| BAT 电流（待机模式） | IBAT | 3 | 5 | μA | 待机模(VCC=5V,VBAT=4.2V) | 4 | |
| BAT 电流（睡眠模式） | IBAT | 0.3 | 0.5 | μA | 睡眠模式，VCC=0 | 4 | |
| 涓流充电阈值电压 | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG=1K，VBAT 上升 | 4 |
| 涓流充电迟滞电压 | VTRHYS | 60 | 80 | 100 | mV | RPROG=1K | 4 |
| VCC 欠压保护阈值电压 | VUV | 3.5 | 3.7 | 3.9 | V | VCC 上升 | 4 |
| VCC-VBAT 阈值电压 | VASD | 60 | 100 | 140 | mV | VCC 上升 | 4 |
| VCC-VBAT 阈值电压 | VASD | 5 | 30 | 50 | mV | VCC 下降 | 4 |
| PROG 引脚电压 | VPROG | 0.9 | 1 | 1.1 | V | RPROG=1K，电流模式 | 4 |
| CHRG 引脚输出低电压 | VCHRG | 0.3 | 0.6 | V | ICHRG=5 mA | 4 | |
| 再充电电池阈值电压 | ΔVRECHRG | 70 | 100 | 150 | mV | VFLOAT-VRECHRG | 4 |
| 再充电比较器滤波时间 | TRECHRG | 1 | 2 | 3 | mS | VBAT 下降 | 4 |
| 结束比较器滤波时间 | TTERM | 1 | 2 | 3 | mS | IBAT 降至 ICHG/10 以下 | 4 |
| VCC 输入电源电压（极限） | VCC | -0.3 | 8 | V | 4 | ||
| PROG 脚电压 | PROG | -0.3 | 0.3 | V | 4 | ||
| BAT 脚电压 | BAT | -0.3 | 8 | V | 4 | ||
| CHRG 脚电压 | CHRG | -0.3 | 8 | V | 4 | ||
| BAT 脚电流 | IBAT | 1100 | mA | 4 | |||
| PROG 脚电流 | IPROG | 600 | uA | 4 | |||
| 工作环境温度 | TOP | -40 | 85 | ℃ | 4 | ||
| 储存温度 | TSTG | -65 | 125 | ℃ | 4 | ||
| ESD HBM | ESD | 2000 | V | HBM | 4 | ||
| ESD MM | ESD | 200 | V | MM | 4 |
CAD (KiCad official)
- Symbol:
GX4056 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
gx4056-etched.step/gx4056-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);gx4056.step/gx4056.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GUOXIN JIAPIN SEMICONDUCTOR datasheet (7 pp, sha256
871e98062a4e6b4c, retrieved 2026-10-19, 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).