US 12,456,917 B2
Protection device
Florin-Silviu Dumitru, Bucharest (RO); Niranjan Reddy Suravarapu, Villach (AT); and Alexandra-Oana Petroianu, Bucharest (RO)
Assigned to INFINEON TECHNOLOGIES AUSTRIA AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Mar. 23, 2023, as Appl. No. 18/125,566.
Prior Publication US 2024/0322670 A1, Sep. 26, 2024
Int. Cl. H02M 1/32 (2007.01); H02M 3/158 (2006.01)
CPC H02M 1/32 (2013.01) [H02M 3/158 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A protection device, comprising:
a first protection stage comprising:
a first p-type transistor comprising a first terminal, a second terminal, and a first gate terminal;
a first voltage regulating device connected between the first terminal and the second terminal;
a second voltage regulating device connected between the first terminal and the first gate terminal;
a third voltage regulating device connected to the first gate terminal; and
a first current source connected to the first gate terminal, wherein:
the first voltage regulating device comprises a reverse biased device distinct from the first p-type transistor.