Pico Communications Power Supply PICOPSU 90 User Manual

picoPSU-90  
12V, 90Watt ATX Power Supply  
Quick Installation Guide  
Version 1.0c  
P/N picoPSU-90  
Introduction  
Based on the electrical design of the picoPSU-120, the picoPSU-90  
is a small yet powerful and fully compliant ATX power supply  
designed to power a wide variety of motherboard from a single 12V  
regulated power source.  
The PICOPSU-90 is the only snap power supply solution for  
general purpose motherboards. Compatible with an entire range of  
mini-ITX, UATX or full size ATX motherboards the picoPSU-90  
provides cool, silent power for system. The PICOPSU-90 has many  
advantages over a regular power supply:  
-Smallest ATX PSU to date  
-100% silent operation  
-Low heat dissipation with efficiency over 95%  
-Plugs directly into the motherboard’s power connector, no cable  
mess  
Quick installation Instructions  
 
Mini-Box.com  
ATX DC-DC Converter Series  
disconnected in case the user does not need any peripheral.  
Additionally, the cable harness can be made to any length or output  
connector type provided that the max load does not exceed 6A for  
GND return. Please look under specifications for the mating  
connector type.  
Removing the picoPSU-90  
In order to remove the picoPSU you must release the power  
connector latch and then remove the unit. Gently lift the picoPSU  
out from the ATX connector, by grabbing from the picoPSU PCB,  
not from components or the wire harness.  
Specifications, picoPSU-90, 90Watts DC-DC ATX Power Supply  
Power Ratings  
Volts (V)  
5V  
Max Load (A)  
6A  
Peak Load (A)  
7A  
Regulation %  
+/- 1.5%  
5VSB  
3.3V  
1.5A  
5A  
2A  
7A  
+/- 1.5%  
+/- 1.5%  
-12V  
12V  
0.05A  
5A  
0.1A  
7A  
+/- 5%  
Switched input  
At max load, forced air ventilation is required. For fanless operation de-rate the output of the 3.3  
and 5V rails by ~25%. Peak load should not exceed 120 seconds. Combined power output  
should not exceed more than 90watts.  
Efficiency Ratings, 3.3 and 5V rail  
CH1=5V  
1A  
Efficiency (%)  
86%  
CH2=3.3V  
Efficiency (%)  
85%  
1A  
3A  
5A  
7A  
3A  
5A  
7A  
95%  
93%  
85%  
94%  
92%  
85%  
Input Requirements: 12V regulated, min=1A, max=10A (load  
dependent). Over-voltage shutdown will occur at ~13-13.5V.  
Size: 44.5mm(L) * 20mm(W) * 30mm (H) (1U compliant)  
Weight: 45gramms, including cable harness, 20 grams without  
cable harness.  
DC-Jack: Female, panel mount, 2.5*5.5*10 mm.  
Connectors  
Molex 39-01-2200 compatible, two 3.5” drive power connectors  
(PATA and SATA) and one P4-12V 4 connector (mini-fit JR 4p).  
picoPSU-90 Quick Installation Guide  
Page 3  
 
Mini-Box.com  
ATX DC-DC Converter Series  
Header and mating connector for the removable cable harness can  
Overload protection  
Over load protection will be effected when either of the loads (+5V  
& +3.3V) exceeds > 200% Max Load.  
Turn-on Delay  
After turning on, at least 20 ms will be needed for the rise of +5VSB  
output voltage (measured from 10% to 95%) to reach its peak.  
Remote ON/OFF control (PS_ON)  
Logic level is LOW - Output voltage is enabled (PS_ON pin)  
Logic level is HIGH - Output voltage is disabled (PS_ON pin)  
PWR_GD  
Logic level is low: PWR_GD=OK  
Logic level is high: PWR_GD=not OK (10.5V<V(in)>13.5V or other  
fault conditions)  
Operating environment: Temperature: -20 to 65 degree  
centigrade.  
NOTE: Thermal shutdown occurs at 105-115C.  
Relative Humidity: 10 to 90 percent, non-condensing.  
Efficiency, MTBF: MTBF >50K hours at 55Celsius, 60watt.  
Shipping and storage: Temperature -40 to +85 degree  
centigrade. Relative humidity 5 to 95 percent, non-condensing  
Warranty  
1 Year Limited Warranty statement. Warranty is void if  
maintenance or calibration is performed by end-user or by use in  
conjunction with power modules not provided by mini-box.com.  
Support  
picoPSU-90 Quick Installation Guide  
Page 4  
 

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