CW1254 is 4~5 cells series protection IC which provides voltage, current, open wire, temperature protections and cell balancing.  

Features    

•Overcharge protection    

     • Threshold 3.650V, 3.850V,and 4.175V ~4.375V,   25mV steps,  ±25mV accuracy    

•Over discharge protection    

     • Threshold from 2.300V to 2.800V,   100mV steps,   ±30mV accuracy    

•Excess discharge current protection    

     • Excess discharge current 1：    

          • Threshold from 0.050V to 0.100V,   ±5mV  accuracy    

     • Excess discharge current 2：    

          • Threshold from 0.100V to 0.200V,    ±10mV  accuracy    

     • Short circuits protection    

          • Threshold from 0.200V to 0.500V,    ±20mV  accuracy    

     •Excess charge current protection    

          •Threshold from-0.010V to -0.050V,   ±5mV  accuracy    

•Flexible temperature protection threshold (Set up by external resistor)    

     • Charging over&under temperature protection    

     • Discharging over&under temperature protection    

•Cell balancing function    

•Open wire detection    

•Load detection    

•Ultra low power dissipation    

     • Normal working 20μA  (25°C)    

     • Sleep mode 5μA   (25°C)    

•Package type: SSOP16   

Application Field    

• Robotcleaner    

• Power tools    

• Portable UPS    

• Other Lithium-ion or Lithium polymer battery packs 

Application Circuits