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EPS2U Power Supply Design Guide, V2.1
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
Tsb_holdup
PSON turn on/off cycle
A
C turn on/off cycle
T
sb_vout
T
pwok_low
T
pson_pwok
T
pwok_off
T
pwok_off
T
pwok_on
T
sb o
n
de
l
ay
T
pson_on_delay
T
pwok_holdup
T
vout_holdup
T
pwok_on
T
AC_on_delay
PSON#
5VSB
PWOK
T
sb_on_delay
Vout
AC Input
Figure 3: Turn On/Off Timing (Single Power Supply)
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