2-cell battery charging IP2323_V0.1

Demo-IP2323 Specifications and
Functions: 
USB 5V input, synchronous boost, charging 2-cell batteries, battery terminal current approximately 0.8A, charging power approximately 7W.
 




Input voltage


4.5~5.5V. 20V Max. 4.5V triggers undervoltage protection, automatically reducing charging power.




Output voltage


2*(4.2V±0.05V) (other specifications can be customized).




Trickle charging


threshold 2*(3.0V±0.05V), trickle current 75mA±25mA .




Full charge cutoff


100mA±50mA. (When the chip output reaches 8.4V but the battery voltage does not, the charging process switches from constant current charging to constant voltage charging. The higher the internal resistance of the battery cell and wires, the longer the constant voltage charging time.)




The LED


output is high during charging and low when fully charged; it flashes in case of an abnormality.




NTC


does not support




chip over-temperature


protection; it has built-in over-temperature protection up to 135℃.




 




USB voltage,


USB current,


battery voltage


, battery


current, charging power


, charging efficiency:




4.87V


1.15A


, 6.65V


0.79A


5.62W


93.80%




, 4.83V


1.43A


,


8.16V 0.78A


6.94W


92.15%.




 
Charging temperature
 
. Schematic diagram
 
, PCB layout,
 
PCB 3D preview,
 
PCB physical image.