uln2803a.pdf
步进电机驱动芯片，3DescriptionTheULN2803Adeviceisa50V,500mADarlingtontransistorarray.ThedeviceconsistsofeightNPNDarlingtonpairsthatfeaturehigh-voltageoutputswithcommon-cathodeclampdiodesforswitchinginductiveloads.Thecollector-currentratingofeachDarlingtonpairis500mA
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