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Intel® Server Board SE7520AF2 TPS
General Specifications
Revision 1.2
245
Intel order number C77866-003
T pson_pwok
Delay from PSON# deactive to PWOK being de-asserted.
50
msec
Tpwok_on
Delay from output voltages within regulation limits to PWOK asserted at
turn on.
100 1000 msec
T pwok_off
Delay from PWOK de-asserted to output voltages (3.3V, 5V, 12V, -12V)
dropping out of regulation limits.
1 200 msec
Tpwok_low
Duration of PWOK being in the de-asserted state during an off/on cycle
using AC or the PSON signal.
100
msec
Tsb_vout
Delay from 5 V SB being in regulation to O/Ps being in regulation at AC
turn on.
50 1000 msec
T5vsb_holdup
Time the 5 VSB output voltage stays within regulation after AC lost.
70
msec
Figure 45. Turn on / off Timing
10.5.2 Voltage
Recovery
Timing Specifications
The power supply must conform to the following specifications for voltage recovery timing under
load changes:
AC Input
Vout
PWOK
5VSB
PSON
T
sb_on_delay
T
AC_on_delay
T
pwok_on
T
vout_holdup
T
pwok_holdup
T
pson_on_delay
T
sb_on_delay
T
pwok_on
T
pwok_off
T
pwok_off
T
pson_pwok
T
pwok_low
T
sb_vout
AC turn on/off cycle
PSON turn on/off cycle