3.7V 4.2V Li-ion Li-Po Lithium Battery Charger Module with automatic current limiting function
     
Power supply voltage DC 4.4-6V(DC 5V),Charging output voltage DC 4.2V;
     
The maximum charge current / output current is 1A, but you can change the current by changing the value of the R1 resistor.
  
Automatic charge current adjustment based on the output capability of input power supply
  
Suitable for Solar-Powered System
  
Precharge Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge
  
Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
  
Automatic Low-Power Sleep Mode When Input Supply Voltage is Removed
  
C/10 Charge Termination
  
Automatic Recharge
   
Battery Overvoltage Protection
      
Led indicator :  ''CR'' LED is charge status indicator
                        ''OK'' LED is fully charged OR Constant voltage mode;
                             
Operating Ambient Temperature－40℃ to ＋85℃
      
Size 18mm x 10.16mm x 2.7mm
Weight : 0.9g(With Pin),0.6g(No Pin)

         
     

      

     

The on-chip adaptive cell can adjust charging current automatically based on the output capability of input power supply, so SD05CRMA is ideally suited for the solar-powered systems, or the applications that need to charge lithium-ion battery or lithium polymer battery with an input power supply whose output capability is limited.
 
  
If your solar panel is 5V, then you can use it directly. Of course, the module can also be powered by a 5V DC power supply.


  
If your solar panel is larger than 5V(e.g. 6V 9V 12V 18V 24V 36V 48V), you can convert it to 5V with DC-DC buck module(e.g. DD2712SA_5V/DD8024TA_5V).