Monitoring safe operating area (SOA) of power switch

• Main Authors: KR ¨ 1 GER, MARCO, NUEBLING MARCUS, BACIGALUPO, TOMMASO
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

Embodiments of the present disclosure generally relate to monitoring a safe operating area (SOA) of a power switch. The disclosure relates to circuits and techniques for protecting a power switch when the power switch is on. A driver circuit may detect whether a power switch is in a desaturation mode or an overcurrent state based on a signal at a detection pin, and disable the power switch in response to detecting that the power switch is in the desaturation mode or the overcurrent state. Further, the driver circuit may detect whether the power switch tends to a safe operating area (SOA) limit of the power switch based on the rate of change of the signal, and disable the power switch in response to detecting that the power switch tends to the SOA limit. 本公开的各实施例总体上涉及监测电源开关的安全操作区(SOA)。本公开涉及用于在电源开关接通时保护电源开关的电路和技术。一种驱动器电路可以基于检测引脚处的信号来检测电源开关是否处于去饱和模式或过电流状态，并且响应于检测到电源开关处于去饱和模式或过电流状态而禁用电源开关。此外，驱动器电路可以基于信号的变化速率来检测电源开关是否趋向于电源开关的安全操作区(SOA)限制，并且响应于检测到电源开关趋向于SOA限制而禁用电源开关。