SilverStone ST45SF User Manual
SFX Form Factor
SPECIFICATION
SFX Form Factor
SST-ST45SF
450W Switching Power Supply
Active PFC Circuit
Full Range Input
1.GENERAL DESCRIPTION AND SCOPE
This is the specification of Model SST-ST45SF; AC-line powered switching power
supply with active PFC (Power Factor Correction) circuit, meet EN61000-3-2 and
with Full Range Input features.
The specification below is intended to describe as detailedly as possible the functions
and performance of the subject power supply . Any comment or additional requirements
to this specification from our customers will be highly appreciated and treated as a new
target for us to approach.
2. REFERENCE DOCUMENTS
The subject power supply will meet the EMI requirements and obtain main safety
approvals
3. INPUT ELECTRICAL SPECIFICATIONS
3.1. AC INPUT
ParameterParameter
Vin (115VAC) 90 115 135 VAC rms
Vin (230VAC) 180 230 265 VAC rms
Vin Frequency 47 -- 63 HZ
Nominal voltages for test purposes are considered to be within ±1.0V of nominal.
3.2. INRUSH CURRENT
Maximum inrush current from power-on (with power on at any point on the AC sine)
and including, but not limited to, three line cycles, shall be limited to a level below the
surge rating of the input line cord, AC switch if present, bridge rectifier, fuse, and EMI
filter components. Repetitive ON/OFF cycling of the AC input voltage should not
damage the power supply or cause the input fuse to blow.
3.3. INPUT LINE CURRENT & POWER FACTOR (P.F.)
(At Full load)
AC input
115V < 5.5Amps – rms > 0.95 > 0.8
230V
3.4. EFFICIENCY
Min.
Input line current
< 3Amps – rms
(1)
Nom.
P.F.@ Full Load
> 0.9
Max
P.F.@ Pin=75W
Unit
> 0.65
as following:
2.1. EMI REGULATORY
- FCC Part 15 Subpart J, Class ‘B’ 115 Vac operation.
- CISPR 22 Class ‘B’ 230 Vac operation.
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Required Minimum Efficiency
Required Minimum Efficiency
Minimum Efficiency for test purposes are considered to be within ±1.0% of nominal.
Voltage
115V
230V
Full load
>82%
>84%
Typical load
>85%
>87%
Light load
>82%
>84%
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