Please give me some advice.
The LM5032 is operating with external synchronization.
Free run frequency is about 180kHz, RT=100kohm.
I want Dutymax≧70%, so RDCL = RT = 100kohm.
External clock is about 200kHz.
UVLO = 1.3V
It operates normally without any problems up to Duty = about 62%,
but the duty does not rise above about 62%.
why?
What is the problem?
When operating at the free-run frequency instead of external synchronization,
the maximum duty can be obtained as shown in the data sheet.
Duty = Works up to about 75%.
Thanking you in advance.