主题中讨论的其他器件: UC1526
1) 1)使用外部 SYNC 时、需要哪种类型的信号? 5V 振幅和300kHz 的方波是否足够?
2) 2)如果外部同步不可用、则在启动期间会发生什么情况? UC1846-SP 默认的频率是多少?
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