SilverStone SST-ST75EF [8/12] Harmonics

8.3 Insulation Resistance

The insulation resistance should be not less than 30M ohm after applying

of 500VDC for 1 minute.

8.4 Dielectric Voltage Withstand

The power supply shall withstand for 1 minute without breakdown the

application of a 60Hz 1500V AC voltage applied between both input line

and chassis (20mA DC cut-off current). Main transformer shall similarly

withstand 3000Vac applied between both primary and secondary windings

for a minimum of one minute.

9.Power Good Signal

A TTL compatible signal for the purpose of initiating an orderly start-up procedure

under normal input operating conditions. During power up, this signal is asserted

( low ) until +5V is under regulation and AC reaches min. line specification range.

After all voltage are going appropriate level, the system may have a turn on delay

of 100mS, but no greater than 500mS. During power off the signal should go to low

level before +5V is out of regulation. The low level is 0 to 0.8V and high level is

4.75 to 5.25V. The " Power Good "signal can drive up to 6 standard TTL loads.

Time Diagram Figure 1

* T1 : Turn on time ( 2 sec. Max.)

* T2 : Rise time ( ≦ 20mS Max.)

* T3 : Power good turn on delay time ( 100 < T3 < 500 mS )

* T4 : Switch on time (0.5 sec. Max.)

* T5 : Power good turn off delay time ( 1.0 mS Min.) PS-ON/OFF

* T6 : Power hold-up time ( 16 mS Min.)

* Power on-off cycle :

When the power supply is turned off for a minimum of 2.0 sec. and turn on again,

the power good signal will be asserted.

10.MTBF

The MTBF of the power should be 100,000 hours min.

11.Harmonics

The product shall meet requirement for EN61000-3-2 & EN61000-3-3 :2003

standard of class D, test at 230Vac 50Hz.