Usb Lithium Ion Battery Charging Circuit

Lithium ion batteries are very powerful and compact in size which is very useful in today s electronics.

Usb lithium ion battery charging circuit.

The battery charger circuit is designed around a dedicated lithium ion battery charger tp4056 ic. For safety reasons most batteries should be charged at between 0 5c and 0 7c. 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. First a preconditioning charge then a constant current fast charge and finally a constant voltage trickle charge to keep the battery topped up.

This charger circuit operates using power from the usb source pc. It is available in 8 pin sop package and requires very minimum external components in order to build a lithium ion battery charger circuit. 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.

Its sop package and low external component count make the tp4056 ideally suited for portable applications. Usb battery charger for lithium ion battery with the lm3622 is a series of lithium ion battery charger. Most lithium ion batteries are charged to 4 2v per cell higher voltages could increase capacity but reduce service life. Charging is performed in three stages.

The tp4056 is a low cost lithium ion battery charger controller ic. The green led should instant become on indicating the battery is being charged. First connect the battery across the indicated points and then plug in the usb connector with your computer s usb socket. It supports a constant current constant voltage charging mechanism for s single cell li ion battery.

It uses a usb mini b for connection to any computer or usb wall adapter. Introduction to tp4056. Tp4056 is a complete constant current constant voltage linear charger for single cell lithium ion batteries. 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 low external component count and small outline package make it perfect for portable applications. Diy lithium battery charger circuit is working based on an op amp of lm358 ic. This is a lithium ion and lithium polymer battery charger based on the mcp73833. 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.