US 12,255,554 B2
Bootstrap start-up circuit for microinverter
Michael J. Harrison, Petaluma, CA (US)
Assigned to Enphase Energy, Inc., Petaluma, CA (US)
Filed by Enphase Energy, Inc., Petaluma, CA (US)
Filed on Nov. 2, 2022, as Appl. No. 17/979,210.
Claims priority of provisional application 63/279,435, filed on Nov. 15, 2021.
Prior Publication US 2023/0155521 A1, May 18, 2023
Int. Cl. H02M 7/797 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/36 (2007.01)
CPC H02M 7/797 (2013.01) [H02M 1/0006 (2021.05); H02M 1/08 (2013.01); H02M 1/36 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A microinverter, comprising:
DC side MOSFETs connected to an input side of the microinverter;
AC side MOSFETs connected to an output of the microinverter; and
a plurality of gate drivers connected to the AC side MOSFETs and configured to automatically drive the microinverter without a DC voltage being applied to the input side of the microinverter;
wherein each of the AC side MOSFETs is connected to one of the plurality of gate drivers, and each of the plurality of gate drivers comprises circuitry and logic to provide a bootstrap start up function.