Patent ID: 9337719
Filing Date: 2016-05-10
CPC Classification: H02M,H03K

Claim Text:
1. A power converter control device, comprising: a drive circuit configured to drive a semiconductor element; a plurality of protection circuits, each of the plurality of protection circuits being configured to detect information corresponding to a protection operation of the semiconductor element, to generate a protection signal, and, in accordance with the protection signal, stop the drive of the semiconductor element by the drive circuit; an alarm signal generation circuit configured to, in response to an output of each of the plurality of protection circuits, generate an alarm signal with a pulse width corresponding to a protection factor of the semiconductor element, and to output the alarm signal; a temperature signal generation circuit configured to detect a temperature of the semiconductor element, and to generate a pulse width modulated (PWM) signal, correlated with the temperature, the cycle of the PWM signal being different from the pulse width of the alarm signal; and an output control circuit configured to select and output the alarm signal instead of the PWM signal when the alarm signal is generated.