CW1244 is 3~4 cells series protection IC which provides voltage, current, open wire, temperature protections and cell balancing.

Description

• 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