AN-32
• Series resistor: 6.8 Ω, 1/4 W (Not needed if KP ≥ 1, i.e.
discontinuous mode).
Step 36. Select feedback circuit components according to
applicable reference feedback circuits shown in Figures 3,
4, 5 and 6
• Applicable reference circuit: Identified in Step 2.
Step 37. Select input bridge rectifier
2
• VR ≥ 1.25 x
x VACMAX; where VACMAX is from Step 1.
• ID ≥ 2 x IAVE; where ID is the bridge rectifier rated current
and IAVE is average input current.
P
OUT
I
=
Note:
;
AVE
VMIN × η
where VMIN is from Step 3 and η from Step 1.
B
12/02
14