SilverStone ST85EF [5/16] St75zf manual 05
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SilverStone ST85EF [5/16] St75zf manual 05

SilverStone ST85EF [5/16] St75zf manual 05
ZEUS ST75ZF
04
3.3 Dynamic Loading
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.
Output
+5V
+12V Combine
+3.3V
ΔStep Load Size
30% of Max. Load
30% of Max. Load
Load Slew Rate
0.5 A/uS
0.5 A/uS
Capacitive Load
1,000 uF
1,000 uF
+5VSB
65% of Max. Load 0.5 A/uS 2,200 uF
25% of Max. Load 0.5 A/uS 1 uF
Table 8 - Transient Load requirements
Output
+5V
+12V
+3.3V
MIN
10
10
MAX
12,000
12,000
Units
uF
uF
-12V
10 11,000 uF
1 350 uF
+5VSB
1 350
uF
Table 9 - Capacitive Loading Conditions
3.4 Capacitive Loading
The power supply shall be stable and meet all requirements, except dynamic loading
requirements, with the following capacitive loading ranges.
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

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