Power semiconductor system

A power semiconductor system, comprising:

• a first power semiconductor element configured to control current flowing between a first electrode and a second electrode with a control electrode;
• a driver IC configured to supply a drive signal turning the first power semiconductor element on and off;
• a first temperature detection element configured to detect a temperature of the driver IC;
• a control circuit configured to supply a control signal for controlling operation of the driver IC to the driver IC;
• and
• an overheat protection control section configured to supply an overheat protection signal to the control circuit based on an output of the first temperature detection element,
• the control circuit receiving the overheat protection signal to perform overheat protection operation for protecting the first power semiconductor element, and
• the overheat protection control section determining whether a temperature detection mode of the driver IC is a steady mode or a transient mode,
• in the steady mode, supplying the overheat protection signal to the control circuit when a temperature measured by the first temperature detection element reaches a steady mode temperature detection level, and
• in the transient mode, supplying the overheat protection signal to the control circuit when a temperature measured by the first temperature detection element reaches a transient mode temperature detection level.