Determine if CP_EN pin will be driven by MCU. It is highly recommended to use CP_EN to turn on the charge pump at system start-up. However, it is not a must to operate the bq76200 to switch on CHG and DSG pins. System designer should ensure the FET's turn on time is acceptable during normal operation if CP_EN is not enabled at system startup.
Select the correct VDDCP capacitance. Scaling up the VDDCP capacitance allows support for a higher number of FETs in parallel. This test result of various parallel FETs versus VDDCP capacitance in the bq76200 application is for general reference only. System designer should always validate their design tolerant across operation temperature range.
If the PMON_EN is used, the PACKDIV resistor divider, Ra and Rb, must be selected to satisfy (Ra+Rb) < 500uA, AND [Rb/(Ra + Rb)] < (max ADC input range)/(max PACK+ voltage). For example, In a 48V system, if the max charger voltage is 50.4V and a MCU's max ADC input is 3V. To meet both (Ra + Rb) < 500uA, AND [Rb/(Ra + Rb)] < (3V/50.4V) requirements, the Ra value might be 100 kΩ or less and Rb value might be 6 KΩ or less.
Follow the application schematic (see Typical Applications) to connect the device.