POWER TRANSISTOR ARRANGEMENT HAVING A CURRENT MEASURING CIRCUIT

A description is given of a power transistor arrangement (11) comprising a power transistor (12) and a current measuring circuit (13) which is connected to the power transistor (12) and is intended to determine a through-current through the power transistor (12). The through-current is guided from t...

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Bibliographic Details
Main Authors STRACHE, Sebastian, BARNER, Alexander, ROSAHL, Thoralf, ERCKERT, Ricardo
Format Patent
LanguageEnglish
French
German
Published 26.01.2022
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
BASIC ELECTRONIC CIRCUITRY
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PULSE TECHNIQUE
TESTING
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Summary:A description is given of a power transistor arrangement (11) comprising a power transistor (12) and a current measuring circuit (13) which is connected to the power transistor (12) and is intended to determine a through-current through the power transistor (12). The through-current is guided from the source connection (14) of the power transistor (12) via at least one source bonding wire (15). A first measuring bonding wire (16) is connected between a first end (17) of the source bonding wire (15) facing the source connection (14) and the source connection (14). A second measuring bonding wire (18) is connected downstream of a second end (19) of the source bonding wire (15) facing away from the source connection (14). Both measuring bonding wires (16, 18) are connected to the current measuring circuit (13). Known power transistor arrangements have only limited reliable overcurrent protection. According to the invention, in addition to the first and second measuring bonding wires (16, 18), a third measuring bonding wire (21) is connected downstream of the second end (19) of the source bonding wire (15), wherein the third measuring bonding wire (21) is also connected to the current measuring circuit (13). As a result, the gate charge can be determined independently of the current through the source bonding wire (15), thus improving the overcurrent protection for the power transistor (12).
Bibliography:Application Number: EP20200712489