Driver circuit for switching edge modulation of a circuit breaker

摘要

The invention relates to a driver circuit (1) for switching edge modulation of a circuit breaker (2). The driver circuit according to the invention comprises a first driver circuit input (3) with a downstream input node (4) and a power switch (2) with an upstream first gate node (6). A charging path (7) comprising a charging resistor (11) is arranged between the input node (4) and the first gate node (6). A discharge path (8) comprising a discharge resistor (16) is also arranged between the input node (4) and the first gate node (6). In addition, a gate path (9) is arranged between the input node (4) and the first gate node (6). A power switch transistor, the gate of which is connected to the first gate node (6), is also provided. A gate path (9) comprises a gate resistor (18). The driver circuit (1, 20) is set up in such a way that the gate path (9) is temporarily short-circuited during the switching operation of the circuit breaker (2) either via the charging path (7) or the discharging path (8), by which the steepness of the switching behavior of the circuit breaker (2) increase.