Other Parts Discussed in Thread: LM5181
There is something wrong with the circuit but I cannot figure out what.
- The expected output voltage is 15V but the output i have is unregulated and changes based on the input voltage. (When the input voltage is 12V the output voltage is 10V)
- The switching frequency is stuck at 10-12 kHz. (It causes an audible high pitch)
- When i add a load of 220 ohm the output stops working .
I have the same behaviour with all 3 of the modules I made.
Can somebody help me?
Below is my schematic:
Below is the wave measured on the SW pin.