SE7500CW2 Server Board Technical Product Specification
General Specifications
99
Revision 1.40
9.5 Power Supply Specifications
This section provides power supply design guidelines for an Intel
®
Server Board SE7500CW2-
based system, including voltage and current specifications, and power supply on/off sequencing
characteristics.
Table 64. SE7500CW2 Static Power Supply Voltage Specification
Parameter
Min
Nom
Max
Units
Tolerance
+3.3 V
+3.25
+3.30
+3.35
V
rms
+1.5/-1.5%
+5 V
+4.90
+5.00
+5.10
V
rms
+2/-2%
+12 V
+11.76
+12.00
+12.24
V
rms
+2/-2%
-12 V
-11.40
-12.20
-13.08
V
rms
+9/-5%
+5 VSB
+4.85
+5.00
+5.20
V
rms
+4/-3%
Table 65. SE7500CW2 Dynamic Power Supply Voltage Specification
Output
Min
Max
Tolerance
+3.3 V
3.20 V
3.46 V
+5 / -3 %
+5 V
4.80 V
5.25 V
+5 / -4 %
+12 V
11.52 V
12.6 V
+5 / -4 %
+5 V SB
4.80 V
5.25 V
+5/ -4%
9.5.1
Power Timing
This section discusses the timing requirements for operation with a single power supply. The
output voltages must rise from 10% to within regulation limits (T
vout_rise
) within 5 ms to 70 ms.
The +3.3 V, +5 V and +12 V output voltages start to rise approximately at the same time. All
outputs must rise monotonically. The +5 V output must be greater than the +3.3 V output during
any point of the voltage rise, however, never by more than 2.25 V. Each output voltage shall
reach regulation within 50 ms (T
vout_on
) of each other and begin to turn off within 400 ms
(T
vout_off
) of each other. The following figure shows the output voltage timing parameters.
