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TPS61500上电瞬间有输出如何解决?

Other Parts Discussed in Thread: TPS61500

我现在用ARM7--LPC2103向TPS61500(5v供电/模拟调光模式)提供PWM波,我的LPC2103引脚必须外接上拉电阻,所以TPS61500的EN引脚上电瞬间有高电平电压,即TPS61500有输出电流。怎么解决上电瞬间有电流输出问题?