-->> ATX power supply board 12VDC
Input 60W DC to ATX Convertor <<--
12VDC Input 60W DC-ATX Convertor
This specification defines the performances and characteristics of a
60 watts, 5 output level DC to DC converter for use in ITX computer system
Ripple & Noise: 200 mVp-p
The converter efficiency should not be less than 90% at the maximum load
with nominal DC input voltage.
3,Output Power Distribution:
Load Current (A),
Maximum Combined Power (W): 63, At max combined power 110W, a fan is required.
4,Output Voltage Regulation:
+12V,+5V,+3.3V and +5VSB: 5%
5,Output Ripple and Noise:
Ripple and noise are defined as periodic or random signals over frequency
band of 10Hz to 20MHz. Measurement shall be made with an oscilloscope
with 20MHz bandwidth. Output should be bypass at the connector with a
0.1uF ceramic capacitor and a 10uF electrolytic capacitor to simulate
Maximum Ripple & Noise ( mVp-p)
The +5VSB is a standby supply output is active whenever the DC input is
This DC output +5VSB is controlled by the DC input, but the other DC output
is controlled by the "PS-ON#" signal and DC input.
8,Overshoot and Undershoot:
Any overshoot at turn on or undershoot at turn off shall be less than
0% of the nominal output voltage values.
The Power-on time is defined as the time from when PS-ON# is pulled low
to when the +12VDC, +5VDC, and +3.3VDC output are within the regulation
range specified in section 3.2. The power-on time shall be less than 500ms
The output voltage shall rise from 10% of nominal to within the regulation
ranges specified in section 3.1 within 0.2ms to 20ms (0.2ms QT2 Q20ms).
11,Power Good Signal:
PS-ON# is an active-low, TTL-compatible signal. When PS-ON# is pulled
to TTL low, the converter should turn on the four main DC output rails:
+12VDC, +5VDC, +3.3VDC, and C12VDC. When PS-ON# is pulled to TTL high
or open-circuit, the DC output rails should not deliver current. PS-ON#
has no effect on +5VSB output, which is always enable whenever the DC
input is present.
"High" is 2.0V ~ 5.25V
"Low" is 0.0V ~ 0.8V
12,Over Voltage Protection:
When the +12VDC, +5Vdc, and +3.3VDC output have over voltage condition,
the converter shall provide latch mode over voltage protection.
13,Short Circuit Protection:
An output short circuit is defined as any output impedance of less than
0.1 ohms. The converter shall shut down and latch off for shorting the
+3.3VDC, +5VDC, or +12VDC rails to return or any other rail. Shorts between
main output rails and +5Vsb shall not cause any damage to converter. The
converter shall either shut down and latch off or fold back for shorting
the negative rails. +5Vsb must be capable of being shorted indefinitely,
but when the short is removed, the +5Vsb output shall recovery automatically
or by cycling PS-ON#. The converter shall be capable of withstanding a
continuous short-circuit to the output without damage or overstress to
14,Over Power Protection:
The converter can use electronic circuit to limit the output power against
excess 110W of surge power or protected against excessive power delivery
at section 6.1 temperature environment due to short circuit of any output
or over total power at any input condition.
No damage or hazardous condition should occur with all the DC output connectors
disconnected from the load. The converter may latch into the shutdown
16,Reset After Shutdown:
If the converter latches into a shutdown state because of a fault condition
on its outputs, the converter shall return to normal operation only after
the fault has been removed and PS_ON# has been cycled OFF/ON with a minimum
OFF time of two seconds.
Operation Temperature: 0 to 40 Relative humidity: 10% to 90%, non-Condensing.
Shipping and storage Temperature: -40 to +70 Relative humidity: 5% to
The demonstrated MTBF shall be 100,000 hours of continuous operation at
25 full load, 80% confidence limit and nominal line. The MTBF of converter
shall be calculated in accordance with MIL-STD-217D/E. The DC Fan is not
Burn-in Test: The power supply shall be 100% burn-in tested with maximum
loading and 40 environment temperature.
Weight: The converter weight: about 45 grams.
Layout: 100mm x 35mm