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同步整流的死区时间最佳为多少?RC滤波又该怎么样选取?
通常在调试初期将死区设置为100ns左右,基本可以保证整流管不会直通。在调试的中后期,需要根据整机效率和副边管的应力微调该死区参数。
副边整流管的RC电路作为有损吸收电路,不建议选取太大,防止降低效率,通常将电容的值选取为1nF.
一般芯片的datasheet上都会有RC滤波的设计指导,可以参看