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公开(公告)号:US4967138A
公开(公告)日:1990-10-30
申请号:US442362
申请日:1989-10-20
IPC分类号: H02M3/158
CPC分类号: H02M3/1582
摘要: A circuit for the conversion of an unregulated input voltage (UE) into a regulated DC output voltage (UA) is specified, with which the input voltage (UE) can assume both a higher and a lower value than the desired output voltage (UA). In addition to a set/actual value comparator (SIV), a current simulation (SNB) is provided, which simulates the current (JL) in the storage choke (L2) during charging as capacitor voltage, a common driver circuit (TRS), designed as switched constant current source, for both semiconductor switches (V1, V2), an input voltage monitoring (ESU), which switches off the switched-mode regulator when there is too low an input voltage (UE) and an output monitoring circuit (ASU), which reduces the set value of the regulating circuit on crossing in the downward direction of a selectable threshold.
摘要翻译: PCT No.PCT / DE88 / 00/56 Sec。 371日期1989年10月20日第 102(e)日期1989年10月20日PCT 1988年3月15日PCT公布。 公开号WO88 / 08638 规定用于将未调节输入电压(UE)转换成稳压的直流输出电压(UA)的电路,输入电压(UE)可以采用高于和低于 所需的输出电压(UA)。 除了设定/实际值比较器(SIV)之外,还提供了一个电流模拟(SNB),它模拟充电期间的存储扼流圈(L2)中的电流(JL)作为电容器电压,公共驱动电路(TRS) 设计为用于两个半导体开关(V1,V2)的开关恒流源,输入电压监视(ESÜ),当输入电压(UE)和输出监视电路(UE)输入电压过低时,切换开关稳压器 ASÜ),其在可选阈值的向下方向上减小了调节电路的交叉设定值。