Question

Can we use two 24V power supplies connecting in series instead of one 48V power supply?

Answer

YES, however care should be used to make sure the required output current not exceed maximum current rating on the smallest power supply in the circuit.
For example:
(PS1 = 24vdc @ 10amps) + (PS2 = 24vdc @ 12amps) = 48vdc @ 10amps
It is also recommended that decoupling diodes with power ratings suitable for the application be used on the outputs of both supplies in the event the power supplies fail to power up at the same time or the load is shorted to protect against reverse voltage being applied to the output terminals.
The Vishay V20100S-E3/4W is good example of a decoupling diode and can be sourced from many online electronic component suppliers.

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FAQ Subcategory: None

This item was last updated on 2014-02-19
Document ID: 1505

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