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TP4056-42-ESOP8

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TOPPOWER Nanjing Extension Microelectronics Battery Management, ESOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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TP4056-42-ESOP8

TOPPOWER Nanjing Extension Microelectronics · Battery Management · ESOP-8

TP4056-42-ESOP8 from TOPPOWER Nanjing Extension Microelectronics, 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 Temperature sense input. Connect to the output of an NTC thermistor in the Li-ion battery pack. If TEMP voltage is below 45% or above 80% of VCC, charging is suspended. Tie to GND to disable the temperature-sense function.
2 PROG bidirectional Constant charge-current programming and charge-current monitor. A resistor RPROG from PROG to GND sets the charge current: IBAT = (VPROG / RPROG) x 1100. Regulated to ~1 V in constant-current mode and ~0.1 V in recharge mode; voltage can be read back to measure IBAT.
3 GND power_in Ground terminal / device return. Also serves as the thermal pad reference on the exposed-pad ESOP-8 package; connect to a large PCB ground copper area for thermal dissipation.
4 VCC power_in Positive input supply (4.0 V typ 5 V, max 8 V). Provides power to the charger. When VCC falls within ~30 mV of VBAT, the device enters shutdown and BAT-pin draw drops below 2 uA.
5 BAT power_out Battery connection. Connect the positive terminal of the single-cell Li-ion battery here. Regulates the final float voltage to 4.2 V and can source up to 1000 mA (1200 mA max). Sinks less than 2 uA in chip-disable or sleep mode.
6 STDBY output Charge-status open-drain output (active low, name is bar-STDBY). Pulled low by an internal switch when the battery charge cycle completes; otherwise high-impedance. Typically drives a status LED to VCC through a series resistor (~1 k).
7 CHRG output Charge-status open-drain output (active low, name is bar-CHRG). Pulled low by an internal switch while the battery is charging; high-impedance otherwise. Typically drives a status LED to VCC through a series resistor (~1 k).
8 CE input Chip enable input, TTL/CMOS compatible. A logic high enables normal operation; pulling CE low forces the TP4056 into shutdown mode. Absolute max range -0.3 V to +10 V.

Key specifications

Parameter Value
Manufacturer TOPPOWER Nanjing Extension Microelectronics
Package ESOP-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • TP4056-42-ESOP8
  • TP4056-42-EMSOP8

CAD (KiCad official)

  • Symbol: TP4056-42-ESOP8
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: tp4056-42-esop8-etched.step / tp4056-42-esop8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tp4056-42-esop8.step / tp4056-42-esop8.glb are the bare package body.

Provenance

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

  • Datasheet: TOPPOWER Nanjing Extension Microelectronics datasheet (15 pp, sha256 10cf357f93b118df, retrieved 2026-08-17, tier: manufacturer)
  • 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).

Datasheet PDF