| 摘要 |
A pulse-width modulated (PWM) DC-DC converter has a multitude of redundant channels supplying PWM signals to a voter whose output voltage controls the regulated DC output voltage. To ensure that single transient events, single permanent faults, or mismatches in the electrical characteristics of the various components disposed in the redundant channels do not adversely affect the regulated DC output voltage, transitions of the PWM signal in each channel are compared to the corresponding transitions of the voter's output signal. If a PWM signal transition of a redundant channel is detected as occurring relatively earlier/later than the corresponding transition of the voter's output signal, the width of the PWM signal is increased/decreased. If a PWM signal transition of a redundant channel is detected as occurring within a predefined window of the corresponding transition of the voter's output signal, the width of the PWM signal is not changed. |
