LLC Resonant Half Bridge Converter
LLC Resonant Half Bridge Converter
LLC Resonant Half Bridge Converter
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Gain Characteristics with Ln and Qe<br />
Q<br />
e<br />
=<br />
Gain<br />
Lr<br />
/ C<br />
R<br />
2<br />
1.8<br />
1.6<br />
1.4<br />
1.2<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
e<br />
r<br />
Q e is related to output load<br />
Q e Increasing with Load Current<br />
Qe=0.0<br />
Qe=0.2<br />
Qe=0.8<br />
Qe=1<br />
Qe=2<br />
Qe=10<br />
ZCS/ZVS<br />
0<br />
0.1 1<br />
fn, (Ln =1)<br />
10<br />
Qe increase with Ln constant (designed Lr, Cr, and operational RL),<br />
- Peak-gain becomes lower<br />
- Frequency at peak-gain moving to right<br />
- Better “frequency-selective<br />
R<br />
f<br />
f<br />
e<br />
0 =<br />
p<br />
f n =<br />
8<br />
= n 2<br />
π<br />
=<br />
2π<br />
f<br />
f0<br />
2<br />
R<br />
L<br />
1<br />
2π<br />
LrCr<br />
1<br />
( Lr<br />
+ Lm<br />
) Cr
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