Filter
Top Products
SSI
EPS1U Power Supply Design Guide, V1.1
Table 16: Turn On/Off Timing
Item Description MIN MAX Units
Tsb_on_delay Delay from AC being applied to 5 VSB being
within regulation.
1500 ms
T ac_on_delay Delay from AC being applied to all output
voltages being within regulation.
2500 ms
Tvout_holdup Time all output voltages stay within regulation
after loss of AC.
18 ms
Tpwok_holdup Delay from loss of AC to deassertion of PWOK 17 ms
Tpson_on_delay Delay from PSON# active to output voltages
within regulation limits.
5 400 ms
T pson_pwok Delay from PSON# deactive to PWOK being
deasserted.
50 ms
Tpwok_on Delay from output voltages within regulation
limits to PWOK asserted at turn on.
100 1000 ms
T pwok_off Delay from PWOK deasserted to output
voltages (3.3 V, 5 V, 12 V, -12 V) dropping out
of regulation limits.
1 ms
Tpwok_low Duration of PWOK being in the deasserted state
during an off/on cycle using AC or the PSON#
signal.
100 ms
Tsb_vout Delay from 5 VSB being in regulation to O/Ps
being in regulation at AC turn on.
50 1000 ms
STATUS
Recommended
Item Description MIN MAX UNITS
T
vout_holdup
Time all output voltages stay within regulation
after loss of AC.
21 ms
T
pwok_holdup
Delay from loss of AC to deassertion of PWOK. 20 ms
T
sb_holdup
Time 5VSB output voltage stays within regulation
after loss of AC.
70 ms