A few more questions:
1. In the application diagram,
a. the part where D4 is located, there is a diode that leads nowhere, and another diode that is not specified. Where does D4 go and what is the spec for the diode beside it?
b. the part where D5 is located, there is another diode located beside it that connects to R34. What is the spec for this diode?
2. Where can I find the thermal information for the bq20z45?