ALARM OUTPUT CIRCUIT

摘要

An alarm output circuit can cope with simultaneous generations of a plurality of alarm factors based on alarm signals output from one output terminal. The alarm output circuit notifies externally of generations of alarm factors in an intelligent power module. A digital/analog converter, into which digital data indicating the presences and absences of generations of the alarm factors is input, outputs corresponding voltages. A voltage control oscillator outputs a signal of a frequency corresponding to an output voltage of the digital/analog converter.

主权项

1. An alarm output circuit into which presences and absences of generations of a plurality of alarm factors in an intelligent power module are input as logical values, and which, based on the logical values, notifies externally of the generations of the alarm factors, the alarm output circuit comprising:
a digital/analog converter into which an item of digital data configured of a logical value relating to one or more of each of the alarm factors is input, and which outputs a voltage corresponding to the item of digital data; and a voltage control oscillator which outputs a signal of a frequency corresponding to the output voltage of the digital/analog converter.