HI Sir,
"Could you please check the following switching frequency waveform images?
The setup is: 24V input, 12V output (max load ~1.8A), R-FSW = 68kΩ, inductor = 15μH, and COMP configured as 680Ω + 33nF (parallel with 1nF) — see the images below.
This 12V output powers both a mini PC and a 200Hz PWM backlight circuit.
Which value should we use for R15: 680Ω, 10kΩ, or another resistance?"




