| 摘要 |
A power converter (300) includes multiple phase circuits (302a-302c), each phase circuit include a power switch (Q3) for delivering power to an output of the power converter, a current sensor (T1) connected to the power switch for sensing a current in the power switch, a duty cycle controller (IC1 ) having an output connected to the current sensor, and a low pass filter (304) connected to the current sensor. The low pass filter is configured to produce a substantially direct current signal proportional t the average current in the power switch. The duty cycle controller is configured to receive the direct current signal and controls a duty cycle of the power switch in response to the direct current signal thereby balancing the currents in the phase circuits. |
