JAJSLQ9C February 2016 – August 2021 TPS65981
PRODUCTION DATA
The design assumes that a DC-DC converter is connected to the paths where there is significant output capacitance on the DC-DCs to provide the additional capacitance for load steps. TI recommends for the DC-DC converters to be capable of supporting current spikes which can occur with certain PD configurations.
The PP_EXT path is capable of supporting up to 5 A which requires additional capacitance to support system loading by the device connected to the charger. A ceramic 10-µF (X7R/X5R) capacitor is used in this design. This capacitor must at least have a 25 V rating and TI recommends to have 30 V or greater rated capacitor.
The PP_HV path is capable of supporting up to 3 A which requires additional capacitance to support system loading by the device connected to the charger. A ceramic 10-µF (X7R/X5R) capacitor coupled with a 0.1 µF high frequency capacitor is placed close to the TPS65981.
The PP_5V0 and PP_CABLE supplies are connected together therefore a ceramic 22-µF (X7R/X5R) capacitor coupled with a 0.1-µF high-frequency capacitor is placed close to the TPS65981. The PP_5V0 path can support 3 A and the PP_CABLE path supports 600 mA for active Type C PD cables.
The design assumes that a DC-DC converter is connected to the paths where there is significant output capacitance on the DC-DCs to provide the additional capacitance. TI recommends that the DC-DC converters are capable of supporting current spikes which can occur with certain PD configurations.