US Patent No. 9,992,916

THERMAL CONTROL PROCESS FOR A MULTI-JUNCTION ELECTRONIC POWER DEVICE AND CORRESPONDING ELECTRONIC POWER DEVICE


Patent No. 9,992,916
Issue Date June 05, 2018
Title Thermal Control Process For A Multi-junction Electronic Power Device And Corresponding Electronic Power Device
Inventorship Domenico Massimo Porto, Catania (IT)
Sergio Lecce, Pavia (IT)
Manuel Gaertner, Feldkirchen (DE)
Assignee STMICROELECTRONICS S.R.L., Agrate Brianza (MB) (IT) STMICROELECTRONICS APP...

Claim of US Patent No. 9,992,916

1. A thermal control method for an electronic device comprising an integrated circuit having a plurality of junction groups, with each junction group comprising a plurality of junctions, and each junction group having a respective thermal detector associated therewith to detect a respective group temperature associated with the respective junction group, the method comprising:comparing the detected group temperatures with a critical thermal group threshold to identify a critical thermal group from among the plurality of junction groups, wherein the junction group having a group temperature exceeding the critical thermal group threshold is identified as the critical thermal group;
deactivating all junctions of the critical thermal group while maintaining the remaining junction groups active;
subsequent to deactivating all junctions of the critical thermal group in response to the group temperature exceeding the critical thermal group threshold, activating one given junction from among the plurality of junctions of the critical thermal group as an active junction while keeping deactivated all other junctions from among the plurality of junctions of the critical thermal group;
detecting the group temperature of the critical thermal group having the active junction and the all other deactivated junctions;
comparing the detected group temperature of the critical thermal group having the active junction and the all other deactivated junctions to a junction thermal critical threshold; and
deactivating the active junction in response to the detected group temperature exceeding the junction thermal critical threshold while activating all other junctions of the critical thermal group.