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Motherboard Description
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1.16.1 Power Supply Considerations
The AP440FX motherboard is designed to operate with a switching power supply in the PS/2
form-factor with dual line input capability, remote ON/OFF, forced air cooling, standby voltage
(VSB), and the following electrical characteristics:
• Power - 200 W maximum peak, 160 W maximum continuous
• Rise time for power supply - 2 ms to 20 ms
• Minimum delay from reset to Powergood - 100ms
• Minimum Powerdown warning - 1 ms
Table 27. DC Voltage
Current Range (amps)
DC Voltage Acceptable Tolerance Maximum Minimum
+3.3 V +5/-3% 14.0 0.3
+5 V ± 5% 18.0 1.0
+5 V SB (standby) ± 5% 0.1 0
-5 V ± 10% 0.3 0
+12 V ± 5% 6.0 0
-12 V ± 10% 0.8 0
1.17 Regulatory Compliance
This printed circuit assembly complies with the following safety and EMI regulations when
correctly installed in a compatible host system.
1.17.1 Safety
1.17.1.1 UL 1950 - CSA 950-95, 3rd edition, Dated 07-28-95
The Standard for Safety of Information Technology Equipment including Electrical Business
Equipment. (USA & Canada)
1.17.1.2 CSA C22.2 No. 950-93, 3rd Edition
The Standard for Safety of Information Technology Equipment including Electrical Business
Equipment. (Canada)
1.17.1.3 EN 60 950, 2nd Edition, 1992 (with Amendments 1, 2 & 3)
The Standard for Safety of Information Technology Equipment including Electrical Business
Equipment. (European Union)
1.17.1.4 IEC 950, 2nd edition, 1991 (with Amendments 1, 2 & 3)
The Standard for Safety of Information Technology Equipment including Electrical Business
Equipment. (International)