I need to use channels 1-4, 8 only. Channels 5, 6, 7 will not be used. In order for channel 4 to operate, ENAFE needs to be high, as does XSLEEPn. Would it be appropriate to ground the VCC5/6/7 and FB Pins? Will this cause the chip to enter OCP mode? If so, should I set the FB pin to the appropriate FB voltage (derived from REF)?