Silverstone SST-DA750 Manual Do Utilizador

 

 

6

  

 

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 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.   
 

  PSON# = Low 

Power ON 

  PSON# = High 

Power OFF 

The efficiency is specified at 50% and 20% loading conditions to help reduce system power 
consumption at typical system loading conditions.   
. 

Loading 100% 

of 

maximum 

50% of maximum 20% of maximum 

Minimum 77% 

80% 

75% 

 

The +5VSB output is always on (+5V Standby) when AC power is applied and power switch is turned 
on.  
The +5VSB line is capable of delivering at a maximum of 3A for PC board circuit to operate. 

Protection circuits inside the power supply shall cause only the power supply’s main outputs to 
shutdown. If the power supply latches off due to a protection circuit tripping, either a AC cycle OFF for 
15 sec, or PSON# cycle HIGH for 1 sec must be able to restart the power supply. 

This power supply shall have current limit to prevent the +5V, +3.3V, and +12V outputs from 
exceeding the values shown in table 14. The current limit shall not trip under maximum continuous 
load or peak loading as described in Table 5. The power supply shall latch off if the current exceeds 
the limit. The latch shall be cleared by toggling the PSON# signal or by cycling the AC power. The 
power supply shall not be damaged from repeated power cycling in this condition. The -12V and 
+5VSB outputs shall be shorted circuit protected so that no damage can occur to the power supply. 

 Voltage 

 Minimum 

Maximum 

 Shutdown Mode 

+5V 110% 160% 

Latch 

Off 

+3.3V 110% 160% 

Latch 

Off 

+12V 110% 160% 

Latch 

Off