Usb Lithium Ion Battery Charging Circuit

Charging is performed in three stages.

Usb lithium ion battery charging circuit.

Its low external component count and small outline package make it perfect for portable applications. Additionally tp4056 is compatible with micro usb as well as adapter. Diy lithium battery charger circuit is working based on an op amp of lm358 ic. 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. Usb battery charger for lithium ion battery with the lm3622 is a series of lithium ion battery charger. This is a lithium ion and lithium polymer battery charger based on the mcp73833. Lithium ion batteries are very powerful and compact in size which is very useful in today s electronics.

First connect the battery across the indicated points and then plug in the usb connector with your computer s usb socket. It uses a usb mini b for connection to any computer or usb wall adapter. Its sop package and low external component count make the tp4056 ideally suited for portable applications. First a preconditioning charge then a constant current fast charge and finally a constant voltage trickle charge to keep the battery topped up.

It supports a constant current constant voltage charging mechanism for s single cell li ion battery. This charger circuit operates using power from the usb source pc. 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. Introduction to tp4056.

When charging it s basically the same charging a 2400mah battery at a maximum current of 1200ma would be a 0 5c charge rate. Tp4056 is a fully linear constant current constant voltage charger for a single cell li ion lipo lithium polymer batteries. The green led should instant become on indicating the battery is being charged. 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.

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. 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 is available in 8 pin sop package and requires very minimum external components in order to build a lithium ion battery charger circuit. Most lithium ion batteries are charged to 4 2v per cell higher voltages could increase capacity but reduce service life.