SLVSD02D March 2015 – June 2019 TPS65982
Figure 30 shows the configuration when the TPS65982 is acting as a sink for the external switch path without an RSENSE resistor. In this mode, current is sunk from VBUS to an internal system power node, referred to as PP_EXT. This is used for charging a battery or for providing a supply voltage for a bus-powered device. To block reverse current, the VBUS and SENSEP pins monitor the voltage across the NFETs. To ensure that SENSEN does not float, tie SENSEP to SENSEN in this configuration. When configured in this mode, the digital readout from current from the ADC will be approximately zero.