| 摘要 |
A multiphase sliding-mode switching power supply ( 24 ) and a method of operating the power supply ( 24 ) are provided. A switch ( 30 ) for each phase ( 28 ) is coupled to a bipolar power source ( 22 ), with each switch ( 30 ) effecting one phase ( 28 ). An inductance ( 32 ) is coupled to each switch ( 30 ), and a capacitance ( 36 ) is coupled to the inductances ( 32 ). A load ( 26 ) is coupled across the capacitance ( 36 ). A sliding-surface generator ( 78 ) is coupled to the monitor circuit ( 38 ) and generates a single sliding surface (sigma) for all phases ( 28 ). A translation circuit ( 102 ) is coupled to the sliding-surface generator ( 78 ) and configured to translate the sliding surface (sigma) into a stream of switching pulses ( 86 ). A transient control ( 52 ) is coupled to the translation circuit ( 102 ) and configured to adjust said stream of switching pulses upon detection of an out-of-range transient. A switching circuit ( 138 ) is coupled to the switches ( 30 ) and the transient control ( 52 ), and switches the switches ( 30 ) in response to the stream of switching pulses ( 86 ).
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