Cartft M3-ATX User manual

GND
+ Switch Logic 6-24V DC-DC
ATX PSU
PC ATX
power
Mother Board
ON/OFF
switch
M1-
Battery
Ig itio SW
-
+
6
Serial ctlr 4
2
8bit MCU
Amplifier
E able
8
Reverse nd
forw rd protection
Status LED
M3-ATX
6-24V Intelligent ATX Power Supply
I stallatio Guide
Version 1.0b
P/N M3-ATX-01
Before you start…
Ple se t ke moment nd re d this m nu l before you inst ll the M3-ATX in your
vehicle. Often times, rushing into inst lling the unit c n result in serious d m ge
to your M3-ATX bo rd, computer nd prob bly your c r’s electric l system. Always
double check the polarity of your wires with voltmeter.
Avoid using the cig rette plug s power source, often times the cont cts re not
c p ble of delivering high current to your PC.
I troductio
Th nk you for purch sing the M3-ATX power sequencer / vehicle ATX power supply.
The M3-ATX w s designed to work with wide v riety of m in bo rds such s the VIA
mini-ITX motherbo rds s well s Pentium-M / Celeron or full power Pentium systems.
M3-ATX Logic Diagram

http://www.cartft.com, Embedded PC Solutions
1.2 M3-ATX Co ectio diagram
Power I put Co ectors (right side)
Red Battery + (positeive, un-switched b ttery)
Black Battery - (neg tive)
White Ig itio (switched b ttery, positive. C n test by connecting it to B ttery +)
Power Output Co ectors (left side)
H rd drive wire h rness (HDD, SATA-HDD, Floppy)
ON/OFF a d THUMP wire har ess (co ects to M3-ATX pi header)
-ON/OFF wire h rness (red/b ck) to connect to motherbo rd’s ON/OFF pin he ders.
-THUMP (white) to connect to mplifier remote ON/OFF connector.
Wire h rness for motherbo rd ON/OFF
switch nd Thump control (option l)
Wire h rness for seri l connection.
IMPORTANT: Alw ys use the “Hibern te” fe ture on your PC, never use “St ndby”.
P0: In this mode, the M3-ATX beh ves like regul r ATX power supply.
P1: Sends ON pulse to motherbo rd when ignition is ON for more th n 2 seconds,
sends OFF pulse to motherbo rd 5 seco ds fter ignition is turned off. W its nother 1
M3-ATX User Guide P ge 2
P Off-delay Hard-off
P0 St nd rd PSU mode
P1 5sec 1 min
P2 1 min 5 min
P3 30 min 2 hour
P4 custom custom

http://www.cartft.com, Embedded PC Solutions
mi ute nd then shuts down 5VSB to conserve b ttery. In this mode, the M3-ATX
consumes less th n 0.5mA. This is our recomme ded setti g.
P2: Sends ON pulse to motherbo rd when ignition is ON for more th n 2 seconds,
sends OFF pulse to motherbo rd 60 seco ds fter ignition is turned off. W its nother 5
mi utes nd then shuts down 5VSB to conserve b ttery.
P3: Sends ON pulse to motherbo rd when ignition is ON for more th n 2 seconds,
sends OFF pulse to motherbo rd 30 mi utes fter ignition is turned off. W its nother 2
hours nd then shuts down 5VSB to conserve b ttery.
P4: C n be set to ny v lue. Setting c n be done vi n option l seri l c ble.
(Def ult v lues for P4 re Off-del y=30sec, H rd-off=30sec)
NOTE: To reset to the M3-ATX settings to the f ctory def ults (in c se ch nges were
m de vi the seri l uplink), simply power off the unit, connect jumper s shown nd
then power b ck up. The LED light will st rt to fl sh r pidly indic ting th t the f ctory
def ults were lo ded. Do ’t forget to Remove jumper whe do e!.
Power challe ges i a Vehicle PC: One of most difficult t sks of oper ting PC in
vehicle is power consumption while the computer is OFF. Even when your computer is
OFF, it will still consume bout 100mA on the 5V r il. When the computer is in the
suspend mode, it will consume even more power, bec use the RAM needs to be
powered t ll times.
No matter how big your battery is, you will eventually drain it if proper actions are not
taken.
The M3-ATX is ddressing these issues by cutting off the 5VSB r il fter pre-defined
mount of time (see jumper ch rt, HARDOFF). During the HARDOFF if the b ttery level
drops below 11.2V for more th n one minute, M3-ATX will shut down nd re- ctiv te only
when the input volt ge is > 12V.
E gi e Cra ks, u der-voltage a d over-voltage situatio s. Another difficult t sk is
m int ining st ble power to your PC. While c r b tteries re r ted t 12V, they ctu lly
provide volt ges in between 7-11V (engine cr nks) or s high s 80 volts (lo d dump).
Most of the times, your b ttery will st y t 13.5V (while c r is running) but extr
prec utions need to t ke pl ce in order to prevent such situ tions. M3-ATX c n oper te
s low s 6V nd s high s 24V while providing strict regul tion on ll r ils long with
input volt ge cl mping nd reverse protection.
Loud amplifier pops whe PC starts. If your PC is connected to your c r mplifier, you
will he r loud pop when the computer is first st rted. The M3-ATX h s n ‘ nti-thump’
control th t will keep your mp OFF while the PC st rts. Simply connect the white wire
from your M3-ATX c ble h rness to your mplifier remote control pin.
Mode of operatio
1) Ignition=OFF. Nothing h ppens. M3-ATX is w iting for ignition sign ls.
M3-ATX User Guide P ge 3

http://www.cartft.com, Embedded PC Solutions
2) Ignition=ON. M3-ATX w its for 2-3 seconds then turns on the 5Vsb r il. After nother second M3-ATX sends n
“ON” sign l to the motherbo rd vi the 2 wires connected to the motherbo rd’s ON/OFF pins. The motherbo rd
will turn ON nd your system should st rt booting.
3) Ignition=ON. Your computer will rem in ON.
4) Ignition=OFF. M3-ATX w its for “OFFDELAY” in seconds (see jumper ch rt) nd then it turns the motherbo rd
OFF by sending sign l to the motherbo rd’s ON/OFF switch. Your computer should turn off gr cefully
(shutdown procedure). After shutdown,
5) 5VSB will still be provided for nother “HARDOFF” seconds. In the event where the shutdown process is longer
th n “HARDOFF” (Oper ting System gets frozen, etc), power will be shut down h rd, turning off ll power r ils.
During the HARDOFF procedure, the b ttery levels will be const ntly monitored to prevent deep disch rge
situ tions.
6) M3-ATX will go to step 1, if ignition is tuned ON g in.
NOTE. When ll config. jumpers re removed, M3-ATX cts s regul r power supply, no ignition timing, no
HARDOFF. M3-ATX will send gr tuitous “ON” pulse to the M/B when power is pplied for the first time. Do not
connect the on/off switch if you don’t w nt your PC to be st rted utom tic lly.
Troubleshooti g
) Motherboard is ot tur i g ON: Check input c bles.M ke sure you h ve well
tighten wire h rness. Me sure the un-switched pin (red). You should see 12V (c r on) or
0V (c r off). NOTE: In P1, P2, P3 modes if V(In) is < 12V, the M3-ATX will not st rt.
b) Motherboard is ot tur i g ON (co t): Ensure tot l system power consumption
does not exceed the M3-ATX specific tions.
c) Motherboard is ot tur i g ON (co t). M ke sure th t the ON/OFF wire h rness
from the M3-ATX is connected to the ON/OFF switch of your M/B.
M3-ATX Characteristics
Minimum Input Oper ting. volt ge 6V
M ximum input Oper ting volt ge 24V (cl mping will occur t 25-27V)
Deep-Disch rge shutdown threshold 11.2V
Input current limit (fuse protected) 15A
M x Output Power 125 W tts (8-16V, see ch rt below)
Deep Sleep Current Consumption. < 0.5mA
Stor ge nd oper ting temper ture -55 to +125 degrees Celsius (stor ge), -40 – 65C (oper ting)
MTBF 150,000 hrs @ 50C, 96,000 hrs @65C
Efficiency (Input 9-16V) >94%, ll r ils combined, 50% lo d.
Input connectors F ston 0.25” termin l
Output Connector ATX Power 20 pin (Molex P/N 39-01-2200)
*Units st rts f iling t >125 Celsius. Oper ting t temper tures bove 85C / 185F will dr stic lly reduce the MTBF.
Maximum Power Characteristics
Output R il Current (M x) Current Pe k
(<30 seconds)
Regul tion
5V 6A 8A 1.5%
3.3V 6A 8A 1.5%
M3-ATX User Guide P ge 4

http://www.cartft.com, Embedded PC Solutions
5VSB 1.5A 2A 1.5%
-12V 0.15A 0.2A 10%
12V 4-6A (see below) 8A (see below) 2%
When oper ting t <8V or >16V or extreme temper tures, de-r te by 25-50%, ventil tion will be required.
12V Rail Output Curre t (buck/boost co verter)
Input (V) 12V out current Input (V) 12V out current
6-8V 4A (6A pe k) 11-16V 6A (8A pe k)
8-11V 5A (7A pe k) 16-24V 4A (7A pe k)
Support a d warra ty: St nd rd H rdw re W rr nty 1Ye r / US, 2 Ye r EU
Inst ll tion support: 30d ys vi em il, [e-mail]
M3-ATX User Guide P ge 5