In the bq40z60 data sheet, the mysterious ACFET has puzzled me. In figure 6, it is wired up in one direction with the input +ve voltage connected to the Drain of this NFET. In figure 8, the input +ve voltage is connected to the Source of this NFET.
Is there a circuit diagram that reveals the correct orientation for the ACFET?
Also, what is the function of this fet?
I have an evaluation board for this part. The circuit diagram shows it (Q5) fitted backwards with another NFET (Q4) fitted backwards. What are these parts doing there?
Best regards,
Tim Orr