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DRV103使用问题 驱动线性气缸

Other Parts Discussed in Thread: DRV103

用DRV103时,参考DRV103应用手册搭建电路

连接stm32L100单片机,22uf电容替换为100uf,8脚置高,电压约3.2v 7脚悬空 3脚串205k到gnd,供电电压24V

肖特基二极管用的是ss14 耐压40v,电流1A

单片机dac输出端连接到1脚,1脚有电压输入,输入范围0-3.3v

但是肖特基二极管两端电压一直在23.9-24.2之间变动

求解答