Power Subsystem
Intel® Server System R2000LH2/T2 Product Family TPS
Revision 1.0
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Practically a blackout of any duration does not damage the power supply in any way and
not cause a latch off condition.
<= 5.0ms
5.0ms
<= 5.0ms
0V
- 48VDC
Rise Time
Fall Time
Figure 19. 0VDC Test
The power supply can also withstand the following transients.
Table 19. Line Voltage Transient Limits
Duration
Slope/Rate
Output
Performance Criteria
200µs max
-48V
→
-30V w/
+2V/µs
Rated DC Voltages
No loss of function
or performance
-30V
→
-48V w/ -
2V/µs
Rated DC Voltages
No loss of function
or performance
3.6.8
Residual Voltage Immunity in Standby Mode
The power supply is immune to any residual voltage placed on its outputs (typically a leakage
voltage through the system from standby output) up to 500mV. There is neither additional heat
generated, nor stressing of any internal components with this voltage applied to any individual
or all outputs simultaneously. It also does not trip the protection circuits during turn on. The
residual voltage at the power supply outputs for no load condition will not exceed 100mV when
AC voltage is applied and the PSON# signal is de-asserted.
3.6.9
Protection Circuits
The protection circuits inside the power supply cause only the power supply’s main outputs to
shut down. If the power supply latches off due to a protection circuit tripping, a DC cycle OFF for
15sec and a PSON# cycle HIGH for 1sec will be able to reset the power supply.
3.6.9.1
Current Limit (OCP)
The power supply has current limit to prevent the outputs from exceeding the values shown in
table below. If the current limits are exceeded, the power supply will shut down and latch off.
The latch will be cleared by toggling the PSON# signal or by a DC power interruption. The
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