Lp = n2 Ls = 62 * 12.76 = 459.4 uH ≈ 460 uH
此电感值为临界电感,若需电路工作于CCM,则可增大此值,若需工作于DCM则可适当调小此值.
Step7. 求CCM时副边峰值电流ΔIsp.
Io(max) = (2ΔIs + ΔISB) * (1- Dmax) / 2
∴ΔIs = Io(max) / (1-Dmax) - (ΔISB / 2 )
∴ΔIsp = ΔISB +ΔIs = Io(max) / (1-Dmax) + (ΔISB / 2 )
= 3.16 / (1-0.52) + 10.533 / 2