US 11,949,328 B2
Bootstrap pre-charge circuit in totem-pole power factor correction converter
Rubinic Jaksa, Markham (CA); Anil Yaramasu, Markham (CA); and Bing Gong, Markham (CA)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Appl. No. 17/425,387
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
PCT Filed Dec. 19, 2019, PCT No. PCT/US2019/067310
§ 371(c)(1), (2) Date Jul. 23, 2021,
PCT Pub. No. WO2020/159640, PCT Pub. Date Aug. 6, 2020.
Claims priority of provisional application 62/704,051, filed on Jan. 28, 2019.
Prior Publication US 2022/0094262 A1, Mar. 24, 2022
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01)
CPC H02M 1/4233 (2013.01) [H02M 1/0006 (2021.05)] 9 Claims
OG exemplary drawing
 
1. A power factor correction converter that outputs a DC output voltage from an AC input voltage, the power factor correction converter comprising:
a first high-side switch and a first low-side switch connected in cascade between a positive output terminal and a negative output terminal of the power factor correction converter and with a first node between the first high-side switch and the first low-side switch;
a second high-side switch and a second low-side switch connected in cascade between the positive output terminal and the negative output terminal and with a second node between the second high-side switch and the second low-side switch;
an inductor connected to a first terminal of the AC input voltage and the first node;
a gate driver connected to the second high-side switch and the second low-side switch;
a bootstrap circuit connected to the second node and the gate driver; wherein
the second node is connected to a second terminal of the AC input voltage; and
the bootstrap circuit is pre-charged at beginnings of negative half-cycles of the AC input voltage.