Usb Lithium Ion Battery Charging Circuit

It supports a constant current constant voltage charging mechanism for s single cell li ion battery.

Usb lithium ion battery charging circuit.

Its low external component count and small outline package make it perfect for portable applications. Connected 3v lithium ion batteries in series will produce a high voltage with less size and easy to transport. For safety reasons most batteries should be charged at between 0 5c and 0 7c. The tp4056 is a low cost lithium ion battery charger controller ic.

This charger circuit operates using power from the usb source pc. Mcigicm 5pcs micro usb 5v 1a 18650 tp4056 lithium battery charger module charging board with protection dual functions 1a li ion 4 6 out of 5 stars 112 5 99 5. Additionally tp4056 is compatible with micro usb as well as adapter. When charging it s basically the same charging a 2400mah battery at a maximum current of 1200ma would be a 0 5c charge rate.

Usb battery charger for lithium ion battery with the lm3622 is a series of lithium ion battery charger. Charging is performed in three stages. First a preconditioning charge then a constant current fast charge and finally a constant voltage trickle charge to keep the battery topped up. The green led should instant become on indicating the battery is being charged.

The following li ion battery charger circuit very efficiently follows the above conditions such that the connected battery is never allowed to exceed its over charge limit. It uses a usb mini b for connection to any computer or usb wall adapter. First connect the battery across the indicated points and then plug in the usb connector with your computer s usb socket. The battery charger circuit is designed around a dedicated lithium ion battery charger tp4056 ic.

Lithium ion batteries are very powerful and compact in size which is very useful in today s electronics. Once the circuit is assembled and set up the below shown design can be used for charging any spare li ion battery through the usb port. Most lithium ion batteries are charged to 4 2v per cell higher voltages could increase capacity but reduce service life. When the ic 555 is used as a comparator its pin 2 and pin 6 become effective sensing inputs for detecting the lower and the upper voltage threshold limits depending upon.

Its sop package and low external component count make the tp4056 ideally suited for portable applications. Tp4056 is a complete constant current constant voltage linear charger for single cell lithium ion batteries. Tp4056 is a fully linear constant current constant voltage charger for a single cell li ion lipo lithium polymer batteries. Introduction to tp4056.