US 12,316,210 B2
Switch controller circuit and method for controlling switching
Leonard Dobos, Ilfracombe (GB); and Anthony New, Ilfracombe (GB)
Assigned to TDK-Lambda UK Limited, Ilfracombe (GB)
Filed by TDK-Lambda UK Limited, Ilfracombe (GB)
Filed on May 3, 2023, as Appl. No. 18/311,400.
Claims priority of application No. 2206590 (GB), filed on May 5, 2022.
Prior Publication US 2023/0361670 A1, Nov. 9, 2023
Int. Cl. H02M 1/08 (2006.01); G01R 15/06 (2006.01); H02M 1/38 (2007.01); H03K 17/687 (2006.01)
CPC H02M 1/08 (2013.01) [G01R 15/06 (2013.01); H02M 1/38 (2013.01); H03K 17/6871 (2013.01); H03K 2217/0063 (2013.01); H03K 2217/0072 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A switch controller circuit for controlling switching in a topology having a first switch, a second switch, and a switching node coupled therebetween, wherein the controller circuit comprises:
a driver arrangement for controlling the first and second switches to alternately open and close, wherein a deadtime period is applied between the opening of one switch and the closing of the other switch in use;
a voltage sensor for connection to the switching node for providing feedback based on a sensed voltage as it transitions between high and low voltage states during the deadtime period; and
wherein the controller is configured to set a length of the deadtime period based on a measured first time period and a multiplier coefficient, wherein the first time period is measured from a time of opening of one of the switches to a time when the sensed voltage transitions through a threshold set between the high and low voltage states;
wherein the first time period has an algorithmic relationship with a second time period, the second time period being a time between the sensed voltage transitioning through the threshold and the time of closing of the other switch; and
wherein the multiplier coefficient is selected such that the deadtime period is the sum of the first time period and the second time period.