The BQ79606A-Q1 has been designed and tested with transformers ranging from 150uH to 650uH. The recommended parameters for the isolation transformer are as follows:
Inductance: 150uH to 650µH
Leakage Inductance: ~20µH
Automotive rated
Operating Temperature: -40C to 125C
Isolation voltage: Depends on total stack voltage (example 2500V AC, 1000V DC for an 400V system) .