Patent ID: 11955953
Assignee: ROBERT BOSCH GMBH
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A protection device (1) for a semiconductor switch (3) comprising:
a capacitive component (11, 11a, 11b);
an integrator (12, 12b) configured to integrate a charging current into the capacitive component (11, 11a, 11b) in order to determine a quantity of charge (Q) in the capacitive component (11, 11a, 11b) from the integrated charging current;
a comparison device (13) configured to control the semiconductor switch (3) when the determined quantity of charge (Q) in the capacitive component (11, 11a, 11b) exceeds a preset limit value (S); and
a logic gate (14) for linking the result of the comparison device (13) and a control signal (D),
wherein the capacitive component (11, 11a, 11b) is arranged between an input terminal (31) of the semiconductor switch (3) and the integrator (12, 12b), and
wherein the integrator (12, 12b) is configured to synchronize the integration of the charging current with the control signal (D) for the semiconductor switch (3).