SilverStone ST50F-ES, ST40F-ES, Essential Plus ST50F-ES, Essential Plus ST40F-ES Specifications

High efficiency with 80Plus certification

24hour continuous power output with 40 C operating temperature

Class-leading single +12V rail

Multiple protection circuitry

Silent running 120mm fan with 18dBA

PCI-E 8pin and PCI-E 6pin connector support

ATX 12V 2.3 support

Active PFC circuitry

Power for everything you need

November, 2009

NO.G1121

ST50F-ES / ST40F-ES

Strider Essential Series

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SPECIFICATION

SilverStone Essential Plus
ST50F-ES
ST40F-ES

ATX12V 2.3 Switching Power Supply
With Active PFC
PS/2

01

This specification defines the performance characteristics of a single phase 500
and 400 watts, 5 output power supply. This specification also defines worldwide
safety and electromagnetic compatibility requirements for the power supply which
is intended for use in computer products.

Nominal Voltage

115-230 Vrms

2.1. Input Voltage

2.1.1 ST50F-ES

2.1.1 ST40F-ES

1.GENERSAL

2.INPUT CHARACTERISTICS

1.1. Scope

Voltage Variation Range

103.5 - 253 Vrms

Nominal Voltage

115-230 Vrms

Voltage Variation Range

103.5 - 253 Vrms

02

2.2 Input Frequency

2.3 Max. Input AC Current

2.4 Inrush Current

2.2.1 ST50F-ES

2.2.2 ST40F-ES

Strider Essential Series

Nominal Frequency

50-60 Hz

Frequency Variation Range

47 Hz to 63 Hz

Nominal Frequency

50-60 Hz

* The power supply must operate at above frequency with 103.5 - 253V ACrms
input voltage range.

The power supply must meet inrush requirements for any rated AC voltage,
during turn on at any phase of AC voltage, during a single cycle AC dropout
condition, during repetitive ON/OFF cycling of AC, and over the specified
temperature range. The peak inrush current shall be less than the ratings of its
critical components (including input fuse, bulk rectifiers, and surge limiting device).

Frequency Variation Range

47 Hz to 63 Hz

2.3.1 ST50F-ES

Max. Input Current

6.5A

Measuring Range

103.5 - 253 Vrms

2.3.2 ST40F-ES

Max. Input Current

5.5A

Measuring Range

103.5 - 253 Vrms

03

ST50F-ES, ST40F-ES provides an efficiency of >80% when measured at full load
under 115V/60Hz and 230V/50Hz condition.

Maximum continuous total DC output power should not exceed 500W.
Maximum continuous combined load on +3.3VDC and +5VDC outputs shall not

exceed 120W.
Maximum combined load on +12V outputs shall not exceed 400W.
When the 12V output is maximum rating, 5V must reach 3A, the output voltage

can be within the specification.
When the 5V output is maximum rating, 12V output rating must reach 11A, the

output voltage can be within the specification.

Output
Voltage

1. +5V 0.2A

2. +3.3V 0.1A

4. +12V

5. -12V

6. +5Vs

0.6A

0.0A

0.0A

20.0A

24.0A

34.0A

0.3A

2.5A

--

--

--

--

--

±5%
±5%
±5%

±10%

±5%

100mV
100mV
150mV
150mV
100mV

Load
MIN

Peak Regulation

Range
MAX

Ripple
P-P Max

2.5 Efficiency

3.1 Normal Operation Output

3.1.1 ST50F-ES

3. OUTPUT CHARACTERISTICS

04

STRIDER ST1000STRIDER ST1000-NV

Strider Essential Series

Maximum continuous total DC output power should not exceed 400W.
Maximum continuous combined load on +3.3VDC and +5VDC outputs shall not

exceed 120W.
Maximum combined load on +12V outputs shall not exceed 300W.
When the 12V output is maximum rating, 5V must reach 3A, the output voltage

can be within the specification.
When the 5V output is maximum rating, 12V output rating must reach 9A, the

output voltage can be within the specification.

NOTE:
Noise test should be measured with 20 MHz bandwidth frequency oscilloscope.
The output terminal shall add a tantalum capacitor of 10uF in parallel with a
ceramic capacitor of 0.1uF.

The PSON# signal is required to remotely turn on/off the power supply, PSON# is
an active low signal that turns on the output power rails. When this is not pulled low
by the system, or left open, the outputs (except the +5VSB) turn off. This signal is
pulled to a standby voltage by a pull-up resistor internal to the power supply.

TTL level "H" 2.0 V - 5.25 V
"L" 0.0 V – 1.0 V

Output
Voltage

1. +5V 0.2A

2. +3.3V 0.1A

4. +12V

5. -12V

6. +5Vs

0.6A

0.0A

0.0A

20.0A

24.0A
25A

0.3A

2.5A

--

--

--

--

--

±5%
±5%
±5%

±10%

±5%

100mV
100mV
150mV
150mV
100mV

Load
MIN

Peak Regulation

Range
MAX

Ripple
P-P Max

3.1.2 ST40F-ES

3.2 Remote On/Off Controlled mode