| US 9,812,977 B2 | ||
| Resonant converters with an improved voltage regulation range | ||
| Liming Ye, Frisco, TX (US); Heping Dai, Plano, TX (US); Dianbo Fu, Plano, TX (US); and Daoshen Chen, Allen, TX (US) | ||
| Assigned to Futurewei Technologies, Inc., Plano, TX (US) | ||
| Filed by Futurewei Technologies, Inc., Plano, TX (US) | ||
| Filed on Apr. 1, 2015, as Appl. No. 14/676,515. | ||
| Prior Publication US 2016/0294294 A1, Oct. 6, 2016 | ||
| Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01) | ||
| CPC H02M 3/33592 (2013.01) [H02M 2001/0058 (2013.01); Y02B 70/1433 (2013.01); Y02B 70/1475 (2013.01); Y02B 70/1491 (2013.01)] | 19 Claims |
| 1. A method comprising:
determining an operating mode based upon an input voltage and an output voltage of a resonant converter comprising:
a switch network coupled to an input dc power source and a resonant tank, wherein a transformer is coupled between the resonant
tank and a full-bridge secondary rectifier;
configuring the switch network to operate at a buck converter mode by controlling on and off of switches of the switch network;
configuring the full-bridge secondary rectifier to operate at a boost converter mode by shorting a secondary side winding
of the transformer;
configuring the switch network to operate at the buck converter mode in response to a first input voltage from the input dc
power source; and
configuring the full-bridge secondary rectifier to operate at the boost converter mode in response to a second input voltage
from the input dc power source, wherein:
the first input voltage is higher than the output voltage of the resonant converter; and
the second input voltage is lower than the output voltage of the resonant converter.
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