Silverstone ST85ZF SST-ST85ZF User Manual

     

 

Description: 

   Electrical Specification

SilverStone Technology Co., Ltd. 

 

Subject: 

SilverStone Technology 

Model: ST85ZF 

Switching Power Supply 

 

 

Document No.: 

   ES-850-ZEUS-01 

File Name: ST85ZF.doc                                           Page :  4    

  

 

Ripple and noise shall be measured using the following methods: 
a) Measurements made differentially to eliminate common-mode noise 
b) Ground lead length of oscilloscope probe shall be 

≤ 0.25 inch. 

c) Measurements made where the cable connectors attach to the load. 
d) Outputs bypassed at the point of measurement with a parallel combination of 

10uF tantalum capacitor in parallel with a 0.1uF ceramic capacitors. 

e) Oscilloscope bandwidth of 0 Hz to 20MHz. 
f) Measurements measured at locations where remote sense wires are connected. 
g) Regulation tolerance shall include temperature change, warm up drift and dynamic load 

The output voltages shall remain within the limits specified in Table 7 for the step loading and within the limits 
specified in Table 8 for the capacitive loading. The load transient repetition rate shall be tested between 50Hz 
and 5kHz at duty cycle ranging from 10%-90%. The load transient repetition rate    is only a test specification. 
The  Δstep load may occur anywhere within the MIN load to the MAX load shown in Table 5.   

ΔStep Load Size 

+5V 

30% of Max. Load

0.5 A/uS 

1,000 uF 

+3.3V 

30% of Max. Load

0.5 A/uS 

1,000 uF 

+12V Combine 

65% of Max. Load

0.5 A/uS 

2,200 uF 

+5VSB 

25% of Max. Load

0.5 A/uS 

1 uF 

3.4 Capacitive Loading   

The power supply shall be stable and meet all requirements, except dynamic loading requirements, with the 
following capacitive loading ranges. 

+5V 10 

12,000 

uF 

+3.3V 10 12,000 uF 

+12V 10 11,000 uF 

-12V 1  350 uF 

+5VSB 1  350  uF