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Hifonics XX-Colossus-II power supply
Hifonics XX-Colossus-II power supply
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Old 18th November 2011, 04:44 PM   #1
WoutRam is offline WoutRam  Netherlands
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Join Date: Nov 2010
Default Hifonics XX-Colossus-II power supply

I have a broken Hifonics XX-Colossus-II.
I noticed that the PWM of the power supply runs at an (audible) 16 KHz which cannot be correct.
Does anyone know at what frequency it should run?
Does anyone have schematics?

Wout Ram
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Old 18th November 2011, 08:53 PM   #2
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
You can calculate the oscillator frequency (pin 5) with the values of the timing resistor and capacitor (connected to pins 5 and 6). The formula is in the datasheet for whatever IC they're using.
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