manual

ST65F-G / ST55F-G
ST55F-G
Voltage
+12V
+5V
+3.3V
Over Current Limit (Iout limit)
50A minimum; 65A maximum
25A minimum; 40A maximum
27A minimum; 45A maximum
ST65F-G
Voltage
+12V
+5V
+3.3V
Over Current Limit (Iout limit)
58A minimum; 70A maximum
25A minimum; 40A maximum
27A minimum; 45A maximum
3.2 Over Temperature Protection
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
shutdown. When the power supply temperature drops to within specifide limits, the power
supply shall restore power automatically. The OTP circuit must have built in hysteresis
such that the power supply will not oscillate on and off due to temperature recovering
condition.
3.3 Over-power protection
The power supply will be shutdown and latch off when output power within 105~150%
of rated DC output.
Note: Assurance machine can work at low voltage,full load won't damage machine.
3.4 Under voltage protection
In an under voltage fault occurs, the supply will latch all DC outputs into a shutdown
state when +12V,+5V & +3.3V outputs under 85% of it's maximum value.
3.5 Over voltage protection
The over voltage sense circuitry and reference shall reside in packages that are separate
and distinct from the regulator control circuity and reference. No single point fault shall
be able to cause a sustained over voltage condition on any or all outputs. The supply
shall provide latch-mode over voltage protection as defined in Table.
output
+12 VDC
+5 VDC
+3.3 VDC
Minimum
13.3
Nominal
15.6
6.30
4.3
Maximum
16.5
7.00
4.50
Unit
Volts
Volts
Volts
3.6 Short circuit
An output short circuit is defined as any output impedance of less than 0.1 ohms.
The power supply shall shut down and latch off for shorting the +3.3 VDC, +5 VDC,
or+12 VDC rails to return or any other rail. Shorts between main output rails and +5VSB
shall not cause any damage to the power supply. The power supply shall either shut
down and latch off or fold back for shorting the negative rails.+5VSB must be capable
of being shorted indefinitely, but when the short is removed, the power supply shall
recover automatically or by cycling PS_ON#. The power supply shall be capable of
withstanding a continuous short-circuit to the output without damage or overstress to the unit.
3.7 No load operation
No damage or hazardous condition should occur with all the DC output connectors
disconnected from the load.The power supply may latch into the shutdown state.
Figure 2. PS-OK Timing Sequence
(1)T3: Power good signal turn on delay time (100ms~500ms)
(2)T4: Power good signal turn off delay time (1ms min)
(3)T2: Rise time (0.1~20ms)
(4)T6: Hold up time (16ms min) Tested at full load and over 100-240VAC input.
4.1 Signal timing drawing
4. TIMING