ZHCSHZ0A April 2018 – July 2018 DRV8306
PRODUCTION DATA.
The DRV8306 device provides a separate sense pin for the common point of the high-side MOSFET drain. This pin is called VDRAIN. This pin allows the sense line for the overcurrent monitors (VDRAIN) and the power supply (VM) to remain separate and prevent noise on the VDRAIN sense line. This separation also allows for a small filter to be implemented on the gate driver supply (VM) or to insert a boost converter to support lower voltage operation if desired. Care must still be taken when the filter or separate supply is designed because VM is still the reference point for the VCP charge pump that supplies the high-side gate drive voltage (VGSH). The VM supply must not drift too far from the VDRAIN supply to avoid violating the VGS voltage specification of the external power MOSFETs.