Switch power converter and frequency response characteristic testing and adjusting method thereof

摘要

A switch power converter and method of testing and adjusting is provided. A switch power unit comprises at least a power switch for transform of the power. A controller is configured to generate a control signal for the power switch. A detector is configured to detect an output voltage signal and/or an output current signal of the switch power unit and output a sampling signal. A testing and adjusting unit is configured to receive the sampling signal and output a testing signal to the controller. The testing and adjusting unit comprises a compensator. The compensator attends the testing and adjusting of the switch power converter. An AC disturbing signal various in frequency causes the difference in the sampling signal and the testing signal so as to test open-loop transfer function of the switch power converter, the compensator compensates frequency response characteristic of the switch power converter, when the frequency response characteristic of the switch power converter doesn't match a target frequency response characteristic.

主权项

1. A switch power converter comprising:
a switch power unit comprising at least a power switch; a controller configured to generate a control signal for the power switch; a detector configured to detect an output voltage signal and/or an output current signal of the switch power unit and output a sampling signal; and a testing and adjusting unit configured to receive the sampling signal and output a testing signal to the controller, the testing and adjusting unit comprising:
a generator for generating an AC disturbing signal;a test part for receiving the AC disturbing signal and the sampling signal so as to measure an open-loop transfer function of the switch power converter, the test part comprising:
a compensator configured for receiving the sampling signal and for outputting a compensation signal; anda signal combiner configured for receiving the compensation signal and the AC disturbing signal and for outputting a mix signal to the controller; andan adjusting part for adjusting the compensator to compensate the switch power converter when a frequency response characteristic of the switch power converter does not match a target frequency response characteristic based on data tested by the test part, wherein
the AC disturbing signal has a frequency that varies with time and causes a difference in the sampling signal and the testing signal so as to test the open-loop transfer function of the switch power converter, andthe compensator compensates the frequency response characteristic of the switch power converter when the frequency response characteristic of the switch power converter does not match the target frequency response characteristic.