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ERP2U Power Supply Design Guide, V1.0
- 17 -
6.4.1 Standby Outputs
STATUS
Required
The 5 VSB output shall be present when an AC input greater than the power supply turn on voltage is applied.
6.5 Voltage Regulation
STATUS
Required
The power assembly output voltages must stay within the following voltage limits when operating at steady state
and dynamic loading conditions. These limits include the peak-peak ripple/noise specified in Section 5.9. All
outputs are measured with reference to the return remote sense (ReturnS) signal. The 5 V, 12V1, 12V2, 12V3, –
12 V and 5 VSB outputs are measured at the power assembly connectors referenced to ReturnS. The +3.3 V is
measured at its remote sense signal (3.3VS) located at the signal connector.
Table 13: Voltage Regulation Limits
Parameter MIN NOM MAX Units Tolerance
+3.3 V (optional) +3.20 +3.30 +3.46 V
rms
+5/-3%
+5 V (optional) +4.80 +5.00 +5.25 V
rms
+5/-4%
+12V1 +11.52 +12.00 +12.60 V
rms
+5/-4%
+12V2 +11.52 +12.00 +12.60 V
rms
+5/-4%
+12V3 (optional) +11.52 +12.00 +12.60 V
rms
+5/-4%
-12 V -11.40 -12.20 -13.08 V
rms
+9/-5%
+5 VSB +4.85 +5.00 +5.25 V
rms
+5/-3%
STATUS
Optional
Some system applications may require tighter regulation limits on the +5 V output. The optional regulation limits
are shown below.
Table 14: Optional +5V Regulation Limits
Parameter MIN NOM MAX Units Tolerance
+5 V +4.85 +5.00 +5.25 V
rms
+5/-3%