I use same.
Li ion solar charger ic.
Here is a tried and tested sample circuit of a li ion battery charger that can be used to charge any 3 7v li ion battery using a 5vdc usb solar panel power supply.
For choosing solar cell you must choose.
Conditioning constant current and constant voltage with an ic thermal protection and safety timer.
Whether you need a single cell linear charger for space constrained applications or a single to multi cell switching charger with high charging current for fast and cool charging our quick search will help you find the right charger.
Setup an array of solar panels on rooftop connect them to a solar charge controller and charge the batteries.
The second simple design explains a straightforward yet precise automatic li ion battery charger circuit using the ubiquitous ic 555.
At the heart of the circuit is one microchip mcp73831 available in sot 23 5 package.
However ltc4054 should be soldered on an sot 23 adapter with header pins for ease of experimentation and appropriate holder for the 18650 li ion battery is an absolute must.
The battery is charged in three phases.
For li ion battery i choose solar cell with 5v and 160 ma.
The charger is made by using a most popular ic tp4056 the tp4056 ic is a complete constant current constant voltage linear charger for single cell lithium ion lithium polymer liion lipo batteries.
Analog devices offers a broad portfolio of high performance battery charger ic devices for any rechargeable battery chemistry including li ion lifepo 4 lead acid and nickel based for both wired and wireless applications these battery charger ics are offered in linear or switching topologies and are completely autonomous in operation.
One mb 102 breadboard can be used for initial tests of the design as the total component count is very low.
The bq24210 device is a highly integrated li ion linear charger targeted at space limited portable applications.
The above discussed li ion battery solar charger circuit using transistors along with auto cut offs works extremely well for almost any small range solar controller programs for instance for charging cellphone battery packs or other styles of li ion battery packs correctly.
Open in new find other battery charger ics description.
Voltage of solar cell 1 5 x voltage of battery so 3 7v to 4 2 v of li ion is equivalent of 5 55 v to 6 3 v of solar cell.
Current of solar cell should have 1 10th of capacity battery diveded by 1 hour for ni mh batteries.
Utilize our battery charger parametric search tools to quickly find the best charger to fit your design specifications.
