首先，老调重谈：这个价格只是参考报价，具体价格得跟代理商协商。 其次，有个便宜些的型号： PTB78560C，参考报价是$30。 The PTB78560x is a series of 30–W rated isolated dc/dc converters, designed to operate from a standard 24–V or 48–V telecom central office (CO) supply. Housed in a 1×2 package, each model has a wide-adjust output voltage that can be set to one of the common intermediate bus voltages of 3.3 V, 5 V, or 12 V.
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