US 12,244,231 B2
Power converter with overdrive switch control
Sujan K. Manohar, Austin, TX (US); and Jay B. Fletcher, Saratoga, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 12, 2024, as Appl. No. 18/634,182.
Application 18/634,182 is a continuation of application No. 17/651,173, filed on Feb. 15, 2022, granted, now 12,034,370.
Prior Publication US 2024/0258924 A1, Aug. 1, 2024
Int. Cl. H02M 3/158 (2006.01); H02M 1/088 (2006.01); H02M 3/07 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/088 (2013.01); H02M 3/07 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a switch circuit that includes a first switch coupled between an input power supply node and a switch node, wherein the first switch is configured to couple the switch node to the input power supply node during an active time period; and
a control circuit configured to:
decrease, during the active time period, an on-resistance of the first switch in response to a determination that a first voltage level of the input power supply node fails to satisfy a threshold value, wherein:
to decrease the on-resistance of the first switch, the control circuit is further configured to change a gate-source voltage of the first switch, and
to change the gate-source voltage of the first switch, the control circuit is further configured to adjust, during the active time period, an active level of a control signal generated by the control circuit.