US 12,237,834 B1
Electronic device and method for overcurrent detection
Isaac Y. Chen, Hsinchu (TW); and Chih-Sheng Chang, Hsinchu (TW)
Assigned to Elite Semiconductor Microelectronics Technology Inc., Hsinchu (TW)
Filed by Elite Semiconductor Microelectronics Technology Inc., Hsinchu (TW)
Filed on Oct. 6, 2023, as Appl. No. 18/377,372.
Int. Cl. H03K 17/08 (2006.01); G01R 19/165 (2006.01); G05F 3/26 (2006.01); H03K 3/023 (2006.01); H03K 5/22 (2006.01); H03K 17/567 (2006.01); H03K 19/0175 (2006.01); H03K 19/20 (2006.01)
CPC H03K 3/023 (2013.01) [G01R 19/16566 (2013.01); G05F 3/267 (2013.01); H03K 5/22 (2013.01); H03K 17/567 (2013.01); H03K 19/017509 (2013.01); H03K 19/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electronic device for overcurrent detection, comprising a high-side voltage-to-current (V2I) converter, a high-side voltage offsetting component, a first high-side comparator, and a high-side overcurrent protection (OCP) signal generator, wherein:
the high-side voltage offsetting component is coupled with the high-side V2I converter and the first high-side comparator and is configured to cause a high-side offsetting voltage drop;
the high-side V2I converter is configured to:
convert a voltage difference between a sum of the high-side offsetting voltage drop and a first balancing voltage drop caused by the high-side OCP signal generator and a first voltage at an input terminal of an upper-bridge power component of a power stage into a first current; and
convert a voltage difference between a second voltage of an output terminal of the upper-bridge power component and a second balancing voltage drop caused by the first high-side comparator into a second current;
the first high-side comparator is coupled with the high-side V2I converter and is configured to compare the first current and the second current; and
the high-side OCP signal generator is coupled with the first high-side comparator and is configured to generate, when the first current is stronger than the second current, a high-side OCP signal with logic high for a driver of the power stage to turn off the upper-bridge power component accordingly.