LLC Resonant Half Bridge Converter
LLC Resonant Half Bridge Converter
LLC Resonant Half Bridge Converter
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Design Consideration -1: Primary RMS Current at Normal<br />
Operation<br />
I<br />
P,<br />
RMS<br />
= I<br />
FHA →<br />
r<br />
=<br />
I<br />
2<br />
m<br />
+ I<br />
⎛<br />
⎜ 2 2 nV<br />
⎜<br />
⎝<br />
π ωL<br />
O<br />
2<br />
Re<br />
m<br />
⎞<br />
⎟<br />
⎟<br />
⎠<br />
2<br />
=<br />
⎛<br />
⎜<br />
π<br />
+<br />
⎜<br />
⎝ 2 2<br />
2<br />
I ⎞ o ⎟<br />
n ⎟<br />
⎠<br />
• Primary current can be easily calculated<br />
from the phasor circuit<br />
• Primary side RMS current is summation<br />
of magnetizing current and load current<br />
• Larger Lm is better for less conduction<br />
losses
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