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光通信应用中用LED电源给电路供电有没有问题?

Other Parts Discussed in Thread: LM2675, LM3409

手上有LM2675,原先是用一个24V恒压源,用LM2675转换成7V,再换成5V、3.3V给电路供电,然后控制一个6W的LED进行光通信。

现在是换了一个大功率48W的照明LED,其自带的电源是27~36V,1.25A的恒流源。考虑效率与LED寿命,LED驱动还是用恒流源好。

请问能直接用这个恒流电源给原电路供电吗?

LM2675手册上最大是输入是40V,但是没有最大输入电流?1.25A它能受得了吗?