恒压转恒流一个关于TVS的问题

现手头上有一款恒压转恒流的产品.
输入24VDC 带15颗1W白光大功率灯.四路输出.
选用(瞬态)抑制二极管的型号为SMAJ10CA
但是一上电源(瞬态)抑制二极管就炸掉
请哪位高手指点一二
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