| 摘要 |
DC-to-DC switching power converter (11) coupled between a higher-voltage bus (13) and lower-voltage bus (18) that can be operated as an up or/and down converter comprises a first switching element (14), a second switching element (15), a sensing means (17) connected in series between an end of an inductor (16) and an end of a capacitor (17-2), a third element (14-1) connected in series between the first element (14) and the higher-voltage bus (13), a fourth element (17-1) connected in series between the sensing means (17) and the lower-voltage bus (18) such that both the third and fourth (14-1,17-1) switches are controlled, open or closed, as a function of a comparison between a predetermined current threshold value and a current level signal provided from the sensing means (17) when the DC/DC switching power converter (11) operates under anomalous condition. <IMAGE>
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