High Power PP-750 Pro HPC-750-B14S 사용자 설명서

        Switching Power Supply Specifications

 

 
 

6 

 
 
 
 

5VSB is requierd for the implementation of PS-ON described above. 5VSB is a standby 
voltage that may be used to power circuits that require power input during the powered-
down state of all power rails. The 5 VSB pin should  deliver 5V ± 5% at a minimum of  3.0 
A for PC board circuits to operate. Conversely, PC board should draw no more than 3.0A 
maximum form this pin. This power may  be used to operate circuits such  as soft  power 
control. 

 

PG-OK is a power  good signal and should be asserted high by power supply to indicate 
that the +5 VDC and +3.3 VDC outputs are above the under-voltage thresholds of the 
power supply. When this signal is asserted high, there should be sufficient mains energy 
stored by the converter to guarantee continuous power operation within specification. 
Conversely, when either the +5VDC or the +3.3VDC output voltage falls below the under-
voltage threshold, or when  mains power has been removed for a time sufficiently long so 
that power supply operation is no longer guaranteed, PG-OK should be deasserted to a low 
state. See Figure 1 for a representation of the timing characteristics of the PG-OK,PS-ON, 
and germane power rail signals. 

 

A default 3.3V sense line should be implemented pin 13 of the connector. 

 
 

The power supply should be able to power up and operate normally with the following  
capacitances simultaneously present on the DC outputs. 
 

Output 

Capacitive load (uF) 

+5V 6,000 

+12V1 5,000 

+12V2 3,000 

+3.3V 6,000 

-12V 350 

+5VS 350 

 

In primary circuit of the power supply , a protected fuse is inserted. Only internal fault of 
the power supply will cause the fuse blown. Any overload or short circuit at DC output will 
keep from fuse brown or fire hazard