SLUUCE8A February 2021 – October 2021 UCC25800-Q1
When using UCC25800EVM-037 with its on-board pre-regulator, connect J1 to J3 and J2 to J4. The pre-regulator input voltage at terminal P2 is DC voltage between 6 V and 26 V, and its output voltage at J3 and J4 is 15.6 V. The Bias board has two DC outputs, 18 V and -5 V at terminal P3.
Note: if resistor R23 exists, then the connection between J1 and J3 is already made through R23.