| US 9,812,968 B2 | ||
| Zero voltage switching detection apparatus and method | ||
| Jinbo Huang, Shenzhen (CN); Xujun Liu, Shenzhen (CN); Dianbo Fu, Plano, TX (US); Liming Ye, Frisco, TX (US); Heping Dai, 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 Nov. 19, 2014, as Appl. No. 14/548,106. | ||
| Prior Publication US 2016/0141960 A1, May 19, 2016 | ||
| Int. Cl. H02M 3/158 (2006.01); H02M 3/335 (2006.01); H02M 1/00 (2006.01) | ||
| CPC H02M 3/33507 (2013.01) [H02M 3/158 (2013.01); H02M 3/1582 (2013.01); H02M 2001/0009 (2013.01); H02M 2001/0058 (2013.01); Y02B 70/1433 (2013.01)] | 20 Claims |
| 1. A converter comprising:
a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches;
a magnetic device coupled to the switch network;
a detector coupled to the magnetic device through a magnetic coupling, wherein a continuous current flowing through a primary
side of the magnetic coupling is proportional to a current flowing through a power inductor of the converter, and wherein
the detector comprises a dc blocking capacitor having a first terminal connected to a secondary side of the magnetic coupling,
a diode and a resistor connected in series and further coupled to a second terminal of the dc blocking capacitor, and a voltage
divider coupled to the second terminal of the dc blocking capacitor; and
a control circuit configured to receive a zero voltage switching signal from the detector and adjust gate drive signals of
the power switches based upon the zero voltage switching signal.
|