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TP5100 4.2v and 8.4v 2A Dual One/Two Lithium Ion 18650 Battery Protection Board


TP5100 4.2v and 8.4v 2A Dual One/Two Lithium Ion 18650 Battery Protection Board is a double switch buck 8.4V, single cell 4. 2V lithium battery charge management chip. Its ultra-compact QFN16 package and simple external circuit, making TP5100 ideal for portable equipment so large current charging management applications. Meanwhile, TP5100 built-in input overcurrent, undervoltage protection, over temperature protection, short circuit protection, battery temperature monitoring, reverse battery protection. CityTech BD 

TP5100 have 5V-18V wide input voltage, dual battery trickle charge into pre-charge, constant current, constant voltage three phase, pre-charge current trickle charge current through an external resistor adjustment, the maximum charge current up to 2A. TP5100 with a frequency of 400kHz switching mode makes it possible to use a smaller outer Suo device and the large current charging still maintain a smaller amount of heat. CityTech BD 

TP5100 built-in power PMOSFET, anti-intrusion circuit, so no anti-intrusion protection and other external Schottky diode.


  • Double 8.4v / 4.2v lithium rechargeable single
  • Programmable charge current. 0. 1A-2A
  • Programmable steady precharge current 10% -100%
  • Wide operating voltage, maximum reach I8V
  • Red and green LED charge status indicator
  • Chip temperature protection, overcurrent protection, undervoltage protection
  • Battery temperature protection, reverse battery shutdown, short circuit protection
  • Switching frequency 400Khz, usable inductance 20uH and more
  • PWR_ON Power battery for switching control




Input Supply voltage (V)

5 ~ 18

Programmable charge current

0.1 ~ 2 A.

Charge status

full and unloaded blue lights, charging red.

Length (mm)


Width (mm)


Height (mm)


Weight (gm)



  • Portable equipment, various chargers
  • Smartphone, PDA, mobile cellular telephone
  • MP4, MP5 players, tablets
  • HM
  • Power Tools
  • Walkie-talkie CityTech BD 

Package Includes:

  • 1 x TP5100 4.2v 8.4v Single Double Lithium Battery Charging Board.


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