https://community.nxp.com/t5/Power-Management/PF1550-Battery-Powerd/m-p/1563509#M2300 <P>Hi,</P><P>I want to use the PF1550 in a wearable device. When I am looking into the typical application circuit I see that VBUSIN is the default power input of the PF1550. If a battery is connected to VBATT and VBUSIN is removed. Will VBATT automatically take over and source VSYS?&nbsp;</P><P>Typically I want a design with a battery powering VSYS and once in a while charge the battery by connecting USB to VBUSIN.&nbsp;</P><P>Kind Regards</P> Fri, 02 Dec 2022 12:51:23 GMT EngineerPMIC 2022-12-02T12:51:23Z https://community.nxp.com/t5/Power-Management/PF1550-Battery-Powerd/m-p/1563509#M2300 <P>Hi,</P><P>I want to use the PF1550 in a wearable device. When I am looking into the typical application circuit I see that VBUSIN is the default power input of the PF1550. If a battery is connected to VBATT and VBUSIN is removed. Will VBATT automatically take over and source VSYS?&nbsp;</P><P>Typically I want a design with a battery powering VSYS and once in a while charge the battery by connecting USB to VBUSIN.&nbsp;</P><P>Kind Regards</P> Fri, 02 Dec 2022 12:51:23 GMT https://community.nxp.com/t5/Power-Management/PF1550-Battery-Powerd/m-p/1563509#M2300 EngineerPMIC 2022-12-02T12:51:23Z https://community.nxp.com/t5/Power-Management/PF1550-Battery-Powerd/m-p/1565059#M2308 <P>Hi Daan,</P> <P>Yes, if the charger is removed from VBUSIN,&nbsp;<SPAN>then VBATT will automatically power VSYS without any interrupt.&nbsp;</SPAN></P> <P><SPAN>Best regards,</SPAN></P> <P><SPAN>Tomas</SPAN></P> Tue, 06 Dec 2022 09:08:33 GMT https://community.nxp.com/t5/Power-Management/PF1550-Battery-Powerd/m-p/1565059#M2308 TomasVaverka 2022-12-06T09:08:33Z