04
3.4 Remote On/Off Control: PSON#
The PSON# signal is required to remotely turn on/off the power supply. PSON# is an active low signal that turns
on the +5V, +3.3V, +12V,-5V and –12V power rails. When this signal is not pulled low by the system, or left open,
the outputs (except the +5VSB and V bias) turn off. This signal is pulled to a standby voltage by a pull-up resistor
internal to the power supply.
Table 5 – Turn On/Off Timing
Item
Tsb_on-delay
Tac_on-delay
Tvout_holdup
Tpwok_holdup
Tpson_on_delay
Tpson_pwok
Tpwok_on
Tpwok_off
Tpwok_low
Tsb_vout
MIN
N/A
N/A
18
17
5
N/A
100
1
100
50
MAX
1500
2500
N/A
N/A
400
50
500
N/A
N/A
1000
Units
mS
mS
mS
mS
mS
mS
mS
mS
mS
mS
Description
Delay from AC being applied to +5VSB is being
within regulation.
Delay from AC being applied to all output voltages
being Within regulation.
All main output voltage stay within regulation after
loss of AC
Delay from loss of AC deassertion of PWOK.
Delay from PSON# active to output voltage within
regulation limits.
Delay from PSON# deactive to PWOK being
deasserted.
Delay from output voltage within regulation limits to
PWOK asserted at turn on.
Delay from PWOK deasserted to output voltages
(+5V, +3.3V, +12V) dropping out of regulation limits.
Duration of PWOK being in the deasserted state
during an off/on cycle using AC or the PSON# signal.
Delay from +5VSB being in regulation to O/Ps being
in regulation at AC turn on.
Table 6 – PWOK Signal Characteristic
Signal Type
PSON# = Low
PSON# = High
Accepts an open collector/drain input from the system.
Pull-up to VSB located in power supply.
Power ON
Power OFF
Содержание Gemini GM500-G
Страница 15: ...NO G11223830...