CW1242B   is 4 cells 2nd protection IC which provides voltage and temperature protections.    

Features    

• Overcharge Protection    

     • Threshold from 2.8V、3.65V~3.95V、4.175V~4.500V， 25mV steps, ±25mV accuracy    

• Over discharge protection    

     • Threshold from1.2V、2.100V~3.000V, 100mV steps，±30mV accuracy    

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

     • Charging over&under temperature protection    

     • Discharging over temperature protection    

•Ultra low power dissipation

     • Normal operation 4μA (25°C)    

     • Sleep mode 2.5μA (25°C)    

• Package type: MSOP10    

Application Field    

• Power tools    

• E-bike    

• Portable UPS    

• Other Lithium-ion or Lithium polymer battery packs    

Application Circuits