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1. 发明公开

EP3182544A1 DIGITAL POWER SUPPLY PROTECTION CIRCUIT AND DEVICE 审中-公开
标题翻译：数字电源保护电路和设备
公开(公告)号：EP3182544A1
公开(公告)日：2017-06-21
申请号：EP15890591.9
申请日：2015-10-19
申请人： Huawei Technologies Co. Ltd.
发明人： XIANG, Li , FAN, Xiaodong
IPC分类号： H02H7/12
CPC分类号： H02H7/0858 , H02H7/0838 , H02H7/12 , H02M1/32 , H02M1/40 , H02M3/337
摘要： A digital power supply protection circuit and an apparatus are used to improve reliability of a bridge circuit. The digital power supply protection circuit includes: a signal preprocessing circuit, configured to receive an overcurrent signal and a first inceptive impulse clock timing, and perform preprocessing on the overcurrent signal according to the first inceptive impulse clock timing so as to obtain a first reference signal, where the first inceptive impulse clock timing is an inceptive impulse clock timing that controls a power switch that is switched on at the first time in a current period; a signal generation circuit, configured to receive the first inceptive impulse clock timing, count time duration between a rising edge of the first inceptive impulse clock timing and a rising edge of the first reference signal so as to obtain a first time duration, and upon the first time duration is greater than a second time duration, generate a first disabling signal by delaying the rising edge of the first inceptive impulse clock timing for the second time duration, where the second time duration is time duration between a switching-on moment of a power switch that is switched on at the second time in a previous period and a moment when an overcurrent occurs; and a clock timing adjustment circuit, configured to adjust the first inceptive impulse clock timing according to the first disabling signal.
摘要翻译：使用数字电源保护电路和装置来提高电桥电路的可靠性。所述数字电源保护电路包括：信号预处理电路，用于接收过流信号和第一触发脉冲时钟定时，并根据所述第一触发脉冲时钟定时对所述过电流信号进行预处理，得到第一参考信号，其中第一触发脉冲时钟定时是控制在当前时段中第一时间接通的功率开关的触发脉冲时钟定时; 信号发生电路，用于接收所述第一触发脉冲时钟定时，对所述第一触发脉冲时钟定时的上升沿与所述第一参考信号的上升沿之间的持续时间进行计数，以获得第一持续时间，第一持续时间大于第二持续时间，通过将第一触发脉冲时钟定时的上升沿延迟第二持续时间来产生第一禁用信号，其中第二持续时间是在第一持续时间和第二持续时间之间的持续时间，在前一时间段和过电流发生时刻第二次接通的电源开关; 时钟定时调整电路，用于根据所述第一禁用信号调整所述第一触发脉冲时钟定时。

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