| 摘要 |
<p>The multiple phase DC to DC converter has several converter channels and a control circuit. Each converter channel is configured to generate a converter channel current, and for adjusting the current in response to a control signal that is electrically connected to the converter channel input. The control circuit comprises an error signal generator, which creates an error signal that represents a comparison of the output voltage to a reference voltage. There are several control circuit channels, each corresponding to one of the converter channels. Each channel comprises a channel current signal generator, in which the signal represents a corresponding converter channel current. There is also a differential channel current signal generator that creates a signal that is representative of a comparison of the channel current signal to an average current signal. The average current signal is representative of an overall average current for all the converter channels. A differential error signal generator produces a differential error signal that is representative of a comparison of the error signal to the differential channel current signal. There is also a pulse width modulator with a ramp input and a control input. The control input is electrically connected to the differential error signal. The modulator is configured to generate the control signal, which is based, at least partly, upon the differential error signal. The control signal is electrically coupled to a corresponding converter channel input. Independent claims are included for a method of balancing several channel currents.</p> |
