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Multiphase DC/DC Converters And Control Circuits For Controlling Converters Using Fixed And/Or Variable Frequencies
Multiphase DC/DC Converters And Control Circuits For Controlling Converters Using Fixed And/Or Variable Frequencies
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机译:多相DC / DC转换器和使用固定和/或可变频率控制转换器的控制电路
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摘要
A multiphase DC/DC power converter includes an input, an output, at least a first converter and a second converter coupled in parallel between the input and the output, an inductor coupled to the first and second converters, an output capacitor coupled between the first and second converters and the output, and a control circuit coupled to the first converter and the second converter. The first and second converters each include a power switch. The control circuit is configured to switch the power switches at a frequency with a phase shift therebetween, and to vary the frequency to regulate a voltage at the output. Additionally, the control circuit may be configured to switch power switches at a fixed frequency with substantially no phase shift therebetween during startup of a multiphase DC/DC power converter, and at a variable frequency with a defined phase shift therebetween after startup.
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