Other Parts Discussed in Thread: LM3429
I'm designing a LED driver with the LM3429 as a boost:
Vo = 15 to 35V (typical: 29,5V).
Io = 0.4 - 1A. (analog dim with i2c digital potentiometer)
I don't quite understant when Is works:
Rlim = 0,08 ohm, so it limites at 3.06A.
FET current It max = ( Iled Dmax / (1-Dmax) ) + 10% = 2,86 A.
There would be a difference with and without (Is connected to PGND) Rlim in normal operation? Or during startup?
What about EMI? Is it better to limit the current or then it would lose efficiency so would be a worse case?
Is there a rule for max current limiting?
Thanks in advance,