US 12,149,232 B2
Multi-voltage bootstrapping drivers
Edward Lee, Fullerton, CA (US); Michael Chapman, Long Beach, CA (US); and Ravi Ananth, Laguna Niguel, CA (US)
Assigned to Efficient Power Conversion Corporation, El Segundo, CA (US)
Filed by Efficient Power Conversion Corporation, El Segundo, CA (US)
Filed on Dec. 7, 2022, as Appl. No. 18/062,698.
Claims priority of provisional application 63/287,213, filed on Dec. 8, 2021.
Prior Publication US 2023/0179195 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 17/06 (2006.01)
CPC H03K 17/063 (2013.01) [H03K 2217/0063 (2013.01); H03K 2217/0072 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A bootstrapping gate driver for a high side FET having a drain terminal connected to a supply voltage, a source terminal connected to an output, and a gate terminal, the bootstrapping gate driver comprising:
an input for receiving a control signal; and
a plurality of bootstrap capacitors electrically connected in parallel between the supply voltage and ground when the control signal corresponds to a charging phase, thereby charging the capacitors, the plurality of bootstrap capacitors being electrically connected in series between the gate and the source of the high side FET when the control signal corresponds to a driving stage;
whereby the voltage between the gate and the drain of the high side FET is equal to or greater than the supply voltage when the control signal corresponds to the driving stage.