Hello,
We have used TIDA-01505 reference design and fabricated a board for testing. Below are our queries:-
1. What is the purpose of jumper J14? Is it to externally supply +20V & -5V to the level shifter? In the application note "TI Designs: TIDA-01505 Automotive 40-V to 1-kV Input Flyback Reference Design Supporting Regenerative Braking Safety Test", this jumper is not present. In the reference design the transformer used is Coilcraft "WA8759-AL" which will provide auxiliary supplies of +20v & 5V. In such case, whether J14 is required?
2. The application note shows transformer "WA8537-BL", while the Reference design uses "WA8759-AL". Please confirm the difference