I have an electronic computer server room device which is old and has a failing wall-wart power supply. It appears to be a switching power supply as it is very tiny but the wall wart is rated to provide 9 volts DC @ 1 amp. A voltmeter on a good one of these shows an actual output of about 9.5 volts.
I have a collection of older linear wall-wart power supplies, some of which also say they are rated for 9 volts DC output, but when I measure it with a voltmeter the output is definitely not 9 volts, but anywhere from 12 v to 15 v DC.
If I understand this correctly there is a relationship of volts to amps, and if the linear supply can't provide the amperage then the voltage will drop. So perhaps the 12 to 15 v DC will drop to about 9v when it is required to produce the rated 1 amp.
Is there a potential risk of blowing up a modern device designed for a modern switching power supply, due to the proper switching supply holding the output voltage to a much tighter tolerance than the old style linear DC power supplies?
I have a collection of older linear wall-wart power supplies, some of which also say they are rated for 9 volts DC output, but when I measure it with a voltmeter the output is definitely not 9 volts, but anywhere from 12 v to 15 v DC.
If I understand this correctly there is a relationship of volts to amps, and if the linear supply can't provide the amperage then the voltage will drop. So perhaps the 12 to 15 v DC will drop to about 9v when it is required to produce the rated 1 amp.
Is there a potential risk of blowing up a modern device designed for a modern switching power supply, due to the proper switching supply holding the output voltage to a much tighter tolerance than the old style linear DC power supplies?