Technical Product Specification

Chassis Power Sub-system Intel
®
Server Chassis P4000S Family TPS
Intel order number G22850-006 Revision 1.5
42
2.2.6.1 Current Limit (OCP)
Below are over current protection limits for each output. If the current limits exceed, the power
supply shuts down and latches-off. The latch will be cleared by toggling the PSON
#
signal or by
an AC power interruption. The power supply is not damaged from repeated power cycling in this
condition. -12V and 5VSB is protected under over current or shorted conditions so that no
damage can occur to the power supply. 5Vsb will be auto-recovered after removing OCP limit.
Table 46. Over Current Limits
Output
Min OCP
Max OCP
+3.3V
22 A
Meet 240VA
+5V
16 A
30 A
+12V1,2
29 A
36 A
+12V3 (240VA limited)
18.5 A
20 A
-12V
No damage
5Vstby
No damage
2.2.6.2 Over Voltage Protection (OVP)
The power supply over voltage protection is locally sensed. The power supply shuts down and
latches-off after an over voltage condition occurs. This latch is cleared by toggling the PSON
#
signal or by an AC power interruption. The table below contains the over voltage limits. The
values are measured at the output of the power supply’s pins. The voltage shall never exceed
the maximum levels when measured at the power pins of the power supply connector during
any single point of fail. The voltage shall never trip any lower than the minimum levels when
measured at the power pins of the power supply connector. 5VSB will be auto-recovered after
removing OVP limit.
Table 24. Over Voltage Protection (OVP) Limits
Output Voltage
MAX (V)
+3.3V
4.5
+5V
6.5
+12V1,2,3
14.5
+5VSB
6.5
2.2.6.3 Over Temperature Protection (OTP)
The power supply will be protected against over temperature conditions caused by loss of fan
cooling or excessive ambient temperature. In an OTP condition the PSU will shut down.
2.2.7 Control and Indicator Functions
The following sections define the input and output signals from the power supply.
Signals that can be defined as low true use the following convention: Signal# = low true
2.2.7.1 PSON# Input Signal
The PSON
#
signal is required to remotely turn on/off the power supply. PSON
#
is an active low
signal that turns on the +3.3V, +5V, +12V1, +12V2, +12V3, and -12V power rails. When this
signal is not pulled low by the system, or left open, the outputs (except the +5VSB) turn off. This