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Effects of Fast vs. Slow Diodes in Clamp Circuit A slow reverse recovery diode (>1 us) reduces the feedback voltage ringing and improve output regulation. Using a fast diode(500 ns) increases the amplitude of ringing which can result in increased output ripple. In Figure 15 the (larger) ring amplitude when using a FR104 diode represents up to an 8% error in the sampled voltage over the time period 2.5 us to 3.1 us.
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发表于 2019-7-20 09:00
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