Cartft picoPSU-150-XT User manual

picoPSU-150-XT
12V, 150Watt, 24pin ATX Power Supply
Quick nstallation Guide
Version 1.0a
P/N picoPSU-150-XT
Introduction
The picoPSU-150-XT 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-150-XT 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-150-XT provides cool, silent power for
system. The PICOPSU-150-XT has many advantages over a regular power
supply:
-Smallest 24 pin 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
-Solid Capacitor design, very long life design.
-12V Aux power connector designed to support processors with TDP of 35 or
65Watts.
-2
nd
HDD power harness connector.

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picoPSU-150-XT Quick Installation Guide Page 2
Quick installation Instructions
The PICOPSU-150-XT has been specifically designed for the Mini-ITX form
factor, thus eliminating the need for ATX power cables. It is also 1U compliant –
height will not exceed 1U formfactor.
1) After the picoPSU module was ‘snapped in’, hook the hard drive power or
floppy power to your floppy/hard drives. If more hard drives or floppy connectors
are needed, use a HDD/floppy “Y” splitter cable.
Fig 1.1 picoPSU-150-XT plugged into ATX connector.
2) Connect a 12 VDC power adapter (or any 12V source) to the DC-to-DC
connector, center pin / white wire is positive (+).
3) Turn on the PC using the motherboard ON/OFF switch
Typical configuration
The picoPSU-150-XT has been tested with all mini-ITX board under virtually any
disk/floppy/CDROM/PCI configuration. Additionally, the PICOPSU-150-XT can
power boards that require 4 pin 12V aux power connector to be used with
processors with TDP ranging from 35 to 65watts.
Removing the picoPSU-150-XT
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.

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picoPSU-150-XT Quick Installation Guide Page 3
Specifications, picoPSU-150-XT, 150Watts DC-DC ATX Power Supply
Power Ratings (max load = 150watts)
Volts
(V)
Max Load
(A)
Peak
Load (A)
Regulation %
5V 6A 8A +/- 1.5%
5VSB 1.5A 2A +/- 1.5%
3.3V 6A 8A +/- 1.5%
-12V 0.05A 0.1A +/- 5%
12V 8A 10A Switched input
Precautions for operating this DC-DC converter:
-For fanless operation de-rate the output of the 3.3 and 5V rails by ~35% or
ensure PSU surface temperature should not exceed 65C, whichever comes first.
-Combined and sustained output should not exceed 65% of total power or or
ensure PSU surface temperature should not exceed 65C, whichever comes first.
-Input current should not exceed 8A. For current higher loads, we suggest using
a 2x2 mini-FIT JR as an input connector.
-Peak load for individual rails should not exceed 60 seconds.
-For long life operation, PSU surface temperature should not exceed 65C.
Efficiency Ratings, 3.3 and 5V rail
CH1=5V Efficienc
y (%)
CH2=3.3
V
Efficiency (%)
1A 86% 1A 85%
3A 94% 3A 93%
5A 96% 5A 94%
8A 93% 8A 91%
Input Requirements: 12V regulated, min=2A, max = load dependent. Over-
voltage shutdown will occur at ~13-13.5V. Do not operate this PSU from a car
battery as unit requires regulated power input !
Size: 53mm(L) * 20mm(W) * 30mm (H) (1U compliant)
Weight: 60gramms, including cable harness, 30 grams without cable harness.
DC-Jack: Female, panel mount, 2.5*5.5*10 mm.

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picoPSU-150-XT Quick Installation Guide Page 4
Connectors
Main connector: 24pin mini-FIT JR type. Two 3.5” drive power connector (one
ATA, one SATA). P4-12V wire harness.
Overload protection
Over load protection will be effected when either of the loads (+5V & +3.3V)
exceeds > 150% 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
Logic level is LOW - Output voltage is enabled (PS_ON pin)
Logic level is HIGH - Output voltage is disabled (PS_ON pin)
Operating environment: Temperature: -20 to 55 degree centigrade.
NOTE: For fanless operation, please ensure that the PSU body temperature,
T(psu) does not exceed 65C. Higher temperatures are allowed, but MTBF could
decrease. Maximum power supply body temperature T(psu) is 85C.
Relative Humidity: 10 to 90 percent, non-condensing.
Efficiency, MTBF: 95%. MTBF=100K hours at T(PSU) 55Celsius.