Resonant LLC Converter: Operation and Design
16
Application Note AN 2012-09
V1.0 September 2012
Table 6 Efficency data
Input Voltage
Output Power (% of 250W)
20% 40% 60% 80% 100%
36V
97.1% ** 97.1%** 97.1% 97.1% 97.1%
33V
96.0% 97.2% 97.6% 97.6% 97.4%
24V
94.5% 96.8% 97.1% 97.0%
18V
94.0% 96.3% 96.2%
** Missing cycle mode / Burst mode operation
Figure 5.7 Efficency curves
96.0%
96.9%
97.4%
97.6%
97.6%
97.4%
93.5%
94.0%
94.5%
95.0%
95.5%
96.0%
96.5%
97.0%
97.5%
98.0%
0 50 100 150 200 250 300
Efficiency %
Output Power (W)
Vin= 33V
Vin= 24V
Vin= 36V
Vin= 18V