User Manual

Table Of Contents

2.4 Overshoot

2.5 Efficiency

Any overshoot at turn on or turn off shall be less 10% of the norminal voltage value, all outputs shall be

within the regulation limit of section 2.0 before issuing the power good signal of section 5.0.

Power supply efficiency typical 90% / 20% Load, 92% / 50% Load, 89% / 100% Load at normal AC main

voltage.

2.6 Remote ON/OFF control

When the logic level "PS-ON" is low, the DC outputs are to be enabled.

When the logic level is high or open collector, the DC outputs are to be disabled.

3.1 Over current protection

ST1000-PT

ST1200-PT

The power supply shall have current limit to prevent the +3.3V,+5V,and +12V

outputs from exceeding the values shown in the following Table. If the current limits are exceeded the

power supply shall shutdown and latch off.

3.2 Over Temperature Protection

3.3 Over-power 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 specified 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.

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. PROTECTION

Voltage

+12V

+5V

+3.3V

Over Current Limit (Iout limit)

90A minimum; 130A maximum

25A minimum; 50A maximum

Voltage

+12V

+5V

+3.3V

Over Current Limit (Iout limit)

120A minimum; 150A maximum

25A minimum; 50A maximum