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View Full Version : Heads up on AT smps



Swarf&Sparks
05-09-2007, 08:29 AM
looking for a high current supply for stepper drivers, wotever?
http://www.antennex.com/preview/archive3/powers.htm

Evan
05-09-2007, 08:46 AM
There is some incorrect information there. The Power Good line is white, not orange. Orange is +3.3 volts and connecting it to +5 would create a short circuit. The Power Good line is not an input, it is an output indicating the supply voltages are stable. Tieing the real power good line to +5 will not turn on the supply either. To do that the green Power On line (pin 14) must be grounded.

Swarf&Sparks
05-09-2007, 08:58 AM
cheers Evan. Didn't really check it.
Just saw the note re floating the negative and thought it might be useful here.