component
PT4056
Public Unreviewedby Ray
PUOLOP 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
markdownPT4056
PUOLOP · Battery Management · ESOP-8
PT4056 from PUOLOP, 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 sense input. Connect to the output of an NTC thermistor divider on the battery pack. Charging is paused when V(TEMP) falls below 45% of Vcc (over-temp) or rises above 80% of Vcc (under-temp). Tie TEMP directly to GND to disable temperature monitoring while leaving other charge functions active. |
| 2 | PROG | passive | Constant-current program and charge-current monitor pin. A resistor R_PROG from PROG to GND sets the fast-charge current: I_BAT = (V_PROG / R_PROG) × 1200, with V_PROG ≈ 1.0 V in constant-current mode (0.1 V during trickle). Pin voltage may be read to monitor instantaneous charge current. Max sink current 1200 µA; 2.0 µA internal pull-up. |
| 3 | GND | power_in | Device ground. Also serves as the thermal reference; connect the SOP-8 exposed pad to this net with a low-impedance copper pour to meet the 130 °C/W θJA assumed in the datasheet. |
| 4 | Vcc | power_in | Input supply from a USB port or wall adapter, 4.0 V typ 5 V max 6 V (abs-max −0.3 V to 7 V). Powers the internal circuitry and the pass FET (R_ON ≈ 650 mΩ). When (Vcc − V_BAT) drops below ≈30 mV the part enters low-power shutdown and the BAT pin sinks less than 2 µA. Decouple with 10 µF near the pin. |
| 5 | BAT | power_out | Charge current output to the positive terminal of the single-cell Li-ion / Li-polymer battery. Regulates to the 4.2 V float voltage (4.137-4.263 V) and delivers up to 1200 mA (abs-max) charge current. Leakage into the battery is <2 µA when the chip is disabled or in sleep. Auto-recharge triggers when V_BAT falls ≥150 mV below V_FLOAT. |
| 6 | STDBY | output | Open-drain charge-complete indicator (active-low, name is bar-STDBY). Internal switch pulls the pin low when the charge cycle terminates; otherwise Hi-Z. Typical V_OL = 0.2 V at 3 mA sink, abs-max 10 V. Drives an LED to GND through a series resistor, or leave floating if unused. |
| 7 | CHRG | output | Open-drain charge-in-progress indicator (active-low, name is bar-CHRG). Pulled low while the charger is delivering current to the battery; Hi-Z otherwise. With a 10 µF cap on BAT and no battery installed, pulses at ≈1-4 s to signal a missing battery. V_OL 0.2 V typ at 3 mA sink; abs-max 10 V. |
| 8 | CE | input | Chip enable input. Logic high enables normal charging; logic low disables the charger and inhibits current into BAT. TTL and CMOS compatible; abs-max −0.3 V to 10 V. Tie to Vcc for always-on operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PUOLOP |
| Package | ESOP-8 |
| Category | PMIC |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
PT4056 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: PUOLOP datasheet (11 pp, sha256
2cc8eaa7b83f45d8, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).