Protection Circuits; Control And Indicator Functions - Intel SC5300BRP Technical Product Specification

Chassis Power Subsystem
Converter Output
5VSB
3.3.3.10 Fan-less Operation in Stand-by Mode
The power supply will work indefinitely in standby mode with power on, power supply plus
power distribution board off, and the 5VSB at full load under environmental conditions
(temperature, humidity, altitude) as specified.
3.3.4

Protection Circuits

Protection circuits inside the power distribution board (and the power supply) shall cause either
the power supply's main +12V output to shutdown, which in turn shuts down the other 3 outputs
on the power distribution board or first shut down any of the 3 outputs on the power distribution
board, which in turn also shuts down the entire power supply combo. If the power supply latches
off due to a protection circuit tripping, an AC cycle OFF for 15 sec min and a PSON# cycle
HIGH for 1sec shall be able to reset the power supply and the power distribution board.
3.3.4.1 Over Current Protection (OCP) / 240VA Current Limit
Each DC/DC converter output on the power distribution board has individual OCP protection
circuits. The power supply will shutdown and latch off after an over current condition occurs.
This latch is cleared by toggling the PSON
+12V output from the power supply is divided on the power distribution board into four channels
and each is limited to 240 VA of power. Current sensors and limit circuits shut down the entire
power supply if the limit is exceeded.
3.3.4.2 Over Voltage Protection (OVP)
Each DC/DC converter output on the power distribution board shall have individual OVP
protection circuits built in and shall be locally sensed. The power supply shall shutdown and
latch off after an over voltage condition occurs. This latch shall be cleared by toggling the
PSON# signal or by an AC power interruption. The values are measured at the power
distribution board harness connectors. The voltage shall never exceed the maximum levels
when measured at the power pins of the output harness 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 distribution board connector.
3.3.5

Control and Indicator Functions

The following sections define the input and output signals from the power distribution board.
Signals that can be defined as low true use the following convention:
signal# = low true
46
Intel® Server Chassis SC5300 5U Kit TPS
Tolerance MIN
-4% / +5% +4.80
#
signal or by an AC power interruption. Also, the
NOM MAX
+5.00 +5.25
Units
VDC
Revision 1.31