| 摘要 |
<p>A multi-phase DC-to-DC converter (1,2,3) is configured to achieve fast transient response and to optimize efficiency over the load range. Phase shedding changes the active number of phases according to output currents. Each phase of the converter has an inductor (12, 13, 14) configured to optimize the efficiency for a range of load currents in which that phase is used. A converter may have 3 phases, the first phase (1) is used mainly in sleep mode and has a large inductance, the second phase (2) is used in a normal operation mode at low currents and having a relatively lower inductance than the first phase, an optional third phase is used in normal operation mode at higher currents and has a relatively smaller inductance with low DC losses. The number of phases is ‰¥2.</p> |
