Bp and Bm of transformer
Posted by: park young gil
on
Hello there!
LINK SWITCH - PH series (LNK417EG ~ 420EG) is used.
LED driver topology is a flyback and buck type.
transformer for the two kinds of questions.
1. In flyback type Bp (peak flux density) and Bm (max flux density) and how to calculate.
2. In buck type in Bp (peak flux density) and Bm (max flux density) and how to calculate.
Thank you.
Whether it's flyback or buck, you can calculate Bp and Bm using the formula:
Bp = (Lp * Ip)/ (np *Ae)
Bm = (Lp * Ilimitmax) / (np * Ae)
where:
Lp = primary inductance
Ip = peak primary current
np= number of primary turns
Ae = Effective core area