Multiple power supplies in series: Negative voltage on one of them possible?
It is common practice to connect multiple power supplies in series to obtain a higher voltage; examples: 1, 2, 3, 4. Many power supplies are designed to handle this application well. However, users are cautioned to check the manual of a power supply if it is really recommended to use it in series with another one.
One issue that might arise is called polarity reversal, i.e. a negative voltage being forced on the output of the "weakest" supply in the chain of series-connected devices. How is this possible?
Note: Same story for batteries. One should make sure that the same type of battery is used together with another, and that multiple series-connected batteries are in equally good (or mediocre) shape.
It is common practice to connect multiple power supplies in series to obtain a higher voltage; examples: 1, 2, 3, 4. Many power supplies are designed to handle this application well. However, users are cautioned to check the manual of a power supply if it is really recommended to use it in series with another one.
One issue that might arise is called polarity reversal, i.e. a negative voltage being forced on the output of the "weakest" supply in the chain of series-connected devices. How is this possible?
Note: Same story for batteries. One should make sure that the same type of battery is used together with another, and that multiple series-connected batteries are in equally good (or mediocre) shape.
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