Pico Communications PSU-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
The PICOPSU-90 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 form factor.
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.
PicoPSu-90 shown with the D201GLY Intel Motherboard.
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 motherboard
switch
Typical configuration
The picoPSU-90 has been tested with all mini-ITX board (VIA C3,
VIA C7, low power AMD, Celeron, Core Solo and Atom) under
virtually any disk / floppy / CDROM / PCI configuration. Additionally,
the PICOPSU-90 can power P4 boards equipped with an 12VATX
4 pin connector. NOTE: The hard drive cable harness can be
picoPSU-90 Quick Installation Guide Page 2

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) Max Load (A) Peak Load (A) Regulation %
5V 6A 7A +/- 1.5%
5VSB 1.5A 2A +/- 1.5%
3.3V 5A 7A +/- 1.5%
-12V 0.05A 0.1A +/- 5%
12V 5A 7A 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 Efficiency (%) CH2=3.3V Efficiency (%)
1A 86% 1A 85%
3A 95% 3A 94%
5A 93% 5A 92%
7A 85% 7A 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
be found at: http://www.jst-mfg.com/product/pdf/eEH.pdf
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
Email: [email protected]
Web Site: http://www.mini-box.com
picoPSU-90 Quick Installation Guide Page 4