http://mini-box.com, Embedded PC Solutions
Loud amplifier pops when PC starts. If your PC is connected to your car amplifier, you
will hear a loud pop when the computer is first started. The M4-ATX has an ‘anti-thump’
control that will keep your amp OFF while the PC starts. Simply connect the white wire
from your M4-ATX cable harness to your amplifier remote control pin.
Mode of operation
1) Ignition=OFF. Nothing happens. M4-ATX is waiting for ignition signals.
2) Ignition=ON. M4-ATX waits for 2-3 seconds then turns on the 5VSB rail. After another second M4-ATX sends
an “ON” signal to the motherboard via the 2 wires connected to the motherboard’s ON/OFF pins. The
motherboard will turn ON and your system should start booting.
3) Ignition=ON. Your computer will remain ON.
4) Ignition=OFF. M4-ATX waits for “OFFDELAY” in seconds (see jumper chart) and then it turns the motherboard
OFF by sending a signal to the motherboard’s ON/OFF switch. Your computer should turn off gracefully
(shutdown procedure). After shutdown, 5VSB will still be provided for another “HARDOFF” seconds. In the
event where the shutdown process is longer than “HARDOFF” (Operating System gets frozen, etc), power will
be shut down hard, turning off all power rails. During the HARDOFF procedure, the battery levels will be
constantly monitored to prevent deep discharge situations.
5) M4-ATX will go to step 1, if ignition is tuned ON again.
NOTE. When all dip switches are off, M4-ATX acts as a regular power supply, no ignition timing, no HARDOFF. M4-
ATX will send a gratuitous “ON” pulse to the M/B when power is applied for the first time. Do not connect the on/off
switch if you don’t want your PC to be started automatically.
M4-ATX Characteristics
Minimum Input Operating. voltage 6V
Maximum input Operating voltage 30V (hard clamping will occur at 34V)
Deep-Discharge shutdown threshold 11.2V
Input current limit (fuse protected) Mini-blade 25A
Max Output Power 250 Watts / 300 watts peak
Deep Sleep Current Consumption. < 1.6mA
Storage and operating temperature -40 to +125 degrees Celsius (storage), -40 – 65C (operating)
MTBF 200,000 Hrs
Efficiency (Input 9-16V) >95%, all rails combined, 50% load.
Input connectors M4 screw terminal
Output Connector ATX Power 24 pin (Molex P/N 39-01-2200)
*Unit shuts down when internal temperature sensor indicates > 85C. This value can be changed with software.
Maximum Power Characteristics
Output Rail Current (Max) Current Peak
(<30 seconds)
Regulation
5V 15A 20A 1.5%
3.3V 15A 20A 1.5%
5VSB 1.5A 2A 1.5%
-12V 0.15A 0.2A 10%
12V 10A (see below) 16A (see below) 2%
When operating at <8V or >28V or extreme temperatures, de-rate by 25%, ventilation might be required.
When operating at constant 160watts or more forced ventilation might be required.
12V Rail Output Current (12V buck/boost converter)
Input (V) 12V out current Input (V) 12V out current
6-8V 8A (10A peak) 11-16V 12A (16A peak)
8-11V 10A (12A peak) 16-30V 12A (14A peak)
Support and warranty: Standard Hardware Warranty 1Year / US, 2 Year EU
M4-ATX User Guide Page 4
To Next Page
Loading...