Protection Circuits; Revision; Table 29. Over-Current Protection (Ocp) - Intel SC5650HCBRP Product Specification

Power Sub-system
While in standby mode, at no load condition, the residual voltage on the 12-V output does not
exceed 100 mV.
4.1.3.16 Soft Starting
The power supply contains control circuits that provide monotonic soft start of its outputs without
overstressing the AC line or any power supply components at any specified AC line or load
conditions. There is no requirement for rise time on the 5VSB but the turn on/off is monotonic.
4.1.3.17 Zero Load Stability Requirements
When the power subsystem operates in a no-load condition in a 1+0 or 1+1 configuration, it
does not need to meet the output regulation specification, but it must operate without any
tripping of over-voltage or other fault circuitry. When the power subsystem is subsequently
loaded, it must begin to regulate and source current without fault.
4.1.4

Protection Circuits

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, an AC cycle OFF for 15
seconds and a PSON# cycle HIGH for 1 second will reset the power supply.
4.1.4.1 Over-current Protection (OCP)
The power supply has a current limit to prevent the +5 VSB and +12 V outputs from exceeding
the values shown in the following table. If the current limits are exceeded, the power supply
shuts down and latches off. The latch is cleared by toggling the PSON
power interruption. The power supply is not damaged from repeated power cycling in this
condition. 5 VSB is protected under over-current or shorted conditions so no damage can occur
to the power supply.
Output
Voltage
+12V
+5VSB
4.1.4.2 Over-voltage Protection (OVP)
The power supply's over-voltage protection is locally sensed. The power supply will shut down
and latch off after an over-voltage condition occurs. You can clear this latch by toggling the
#
PSON signal or by an AC power interruption. The following table contains the over-voltage
limits. The values are measured at the output of the power supply's connectors. The voltage
never exceeds the maximum levels when measured at the power pins of the power supply
70

Table 29. Over-current Protection (OCP)

Over-current Protection Limits
120% min (= 58.8 A min); 140% max (= 68.6 A max)
120% min (= 3.6 A min); 200% max (= 6.0 A max)
Intel order number E81443-002
Intel® Server System SC5650HCBRP TPS
#
signal or by an AC

Revision 1.2