cmv@ihlpm.ATT.COM (C M Votava) (02/06/88)
I've seen a bunch of questions about the technical specifications for the unix-pc power supply, and thought I could offer some help. Below is some preliminary specifications on the power supply that I've come across. I can't tell if these actually became part of the end product or not, so take them with that in mind. PRIMARY MODULATION: The power supply is a switching regulator supply that uses primary pulse width modulation to control the output voltages, independent of line voltage and DC load variation. The modulating frequency is 20KHz or higher. PRIMARY PROTECTION: To protect the primary section of the supply against abnormal overloads from any of the DC outputs, the supply should have a constant current or current recycling circuit to allow for the safe power up of large capacitive loads. The primary in rush current during power up (from cold start) should be limited to 34 AMPS peak (for 110V). OPERATING ENVIRONMENT: operating temperature range: 10C to 60C non-operating temperature range: below 40C and above 75C humidity 5-95% operating altitude: 15,000 Ft. ASI non-operating altitude: 25,000 Ft. ASI POWER TO FANS: There shall be a +12v supply to two 3" fans, with a temperature switch which allows full voltage to the fans at 45C. PARAMETER CONDITIONS MIN TYP MAX ======================================================================== V1 Output Voltage Min.<=I1<=Max. 4.95V 5.00V 5.05V 0<=I2, I3<=Max. V2 Output Voltage Min.<=I1, I2, I3<=MAX. 11.76V 12.00V 12.24V V3 Output Voltage Min.<=I1, I2, I3<=Max. -11.40V -12.00V -12.60V I1 Output Current(V1) V1=5.00V 5A 20A I2 Output Current(V2) V2=12.00V .75A 3.0A I3 Output Current(V3) V3=-12.00V .05A .3A Output Power V1, V2, V3=Max 163W for 10sec from power on 139.6W Hope this helps...