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8-28V 150W dc-dc atx auto car pc power supply with itps
8-28V 150W DC-DC ATX Auto Car PC Power Supply With ITPS
This power supply widely used with Pentium-M Celeron, P4 and VIA mini-ITX main board
2.Low consumption and high effeciency
3.Advanced ITPS automotive ignition control
4.Input over voltage or low voltage safeguard
5.Output over or low voltage safeguard
7.Support P4, ATX power supply mode
Output Rail Current (Max) Current Peak(<60 seconds) Regulation
What is wide range automotive DC to DC power supply?
Standard automotive voltage is 12V. Wide range automotive voltage is 8V-28V or 6V-36V. They are all suitable for standard requirement. The moment when ignition, the voltage will fall to around 8V, so we should control the input voltage below 8V to avoid CARPC restart, to crash, main board burnt and so on. So please attention if it is 7-24V, and output is ATX, of course wider then this range the cost will be high)
What is automotive ITPS function mode power supply?
This is car ignition control system. This mode can control PC start or exit by ignition system. Put it briefly, when get on and screw key, DC power supply will sent a signal to main machine, and PC will start after 5-10s( avoid engine start electrical peak) by ACC switch control. After get off and draw key, you can go. After 10-30s, ITPS will send a signal to PC to let it turn off. Delay 30s is to avoid accident when drive (e.g. car flameout when drive) to lead to PC turn off. Then after 60s, it will shut off gradually. ITPS function achieve turning on / off power supply automatically to avoid storage battery running off.
NOTE: If HARDOFF is set to never , PPL-I-150 will automatically shut down when battery voltage is below 11.2V for more than 1 minute in order to prevent deep
Mode 0 is regular ATX power supply mode, no power sequencing provided, can be used for non vehicle applications.
Avoid using HARDOFF = Never, can severely discharge your battery if PC. Suggested modes are: 1, 2, and 4.
1.2 Power challenges in a Vehicle PC
The 5V Standby Problem: One of most difficult tasks of operating a PC in a vehicle is power consumption while the computer is OFF. Even when your computer is OFF, it will still consume about 100mA on the 5V rail. All power supplies provide 5VSB (5V standby) so that the motherboard can issue at least a PSON signal. When the computer is in the suspend mode, it will consume even more power, because the RAM needs to be powered at all times.
No matter how big your battery is, it will eventually drain your battery in a matter of days.
The PPL-I-150 is addressing these issues by cutting off the 5VSB rail after a pre-defined amount of time (see jumper chart, HARDOFF). When 5VSB is always active (HARDOFF=Never), PPL-I-150 constantly monitors the battery levels. When battery level drops below 11V for more than one minute, PPL-I-150 will shut down and re-activate. only when the input voltage is > 11V
Engine Cranks, under-voltage and over-voltage situations. Another difficult task is maintaining stable 3.3V, 5V, 12V and -12V power to your PC. While car batteries are rated at 12V, they actually provide voltages in between 7-11V (engine cranks) or as high as 80 volts (load dump). Most of the times, your battery will stay at 13.5V (while car is running) but extra
precautions need to take place in order to prevent such situations. PPL-I-150 can operate as low as 8V and as high as 28V while providing strict regulation on all rails along with
input voltage clamping and reverse protection. 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 PPL-I-150 has an anti-thump 1.2 Power challenges in a Vehicle PC
The 5V Standby Problem: One of most difficult tasks of operating a PC in a vehicle is power consumption while the computer is OFF. Even when your computer is OFF, it will still
consume about 100mA on the 5V rail. All power supplies provide 5VSB (5V standby) so that the motherboard can issue at least a PSON signal. When the computer is in the suspend
mode, it will consume even more power, because the RAM
needs to be powered at all times.
The PPL-I-150 is addressing these issues by cutting off the 5VSB rail after a pre-defined amount of time (see jumper chart, HARDOFF). When 5VSB is always active (HARDOFF=Never), PPL-I-150 constantly monitors the battery levels. When battery level drops below 11V for more than one minute, PPL-I-150 will shut down and re-activate.
only when the input voltage is > 11V
precautions need to take place in order to prevent such situations. PPL-I-150 can operate as low as 8V and as high as 28V while providing strict regulation on all rails along with input voltage clamping and reverse protection. 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 PPL-I-150 has an anti-thump control that will keep your amp OFF while the PC starts.
Simply connect J6 to your amplifier remote control pins to activate the anti-thump feature.
The PPL-I-150 performs several timing routines and takes actions as follows:(NOTE: When all config jumpers are removed, PPL-I-150 will be in the dumb PSU mode ,no ignition timing, no HARDOFF. PPL-I-150 will send a gratuitous ON pulse to the M/Bwhen power is applied for the first time. Do not connect J8/J9 to the M/B on/off switch if you don t want your PC to be started automatically.
1) Ignition=OFF. Nothing happens. PPL-I-150 is waiting for ignition signals.
2) Ignition=ON. PPL-I-150 waits for 2-3 seconds then turns on the 5Vsb rail. After another second PPL-I-150 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 during driving. Your computer will remain ON.
4) Ignition=OFF. PPL-I-150 waits for OFFDELAY in seconds (see jumper chart on Page 2) 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). During this time, power will still be available for your PC to perform shutdown.
5) 5VSB will still be provided for another HARDOFF seconds (see jumper chart). In the event where the shutdown process is longer than OFFDELAY (windows gets frozen, etc), power will be shut down hard, turning off all power rails. If HARDOFF is set to NEVER , the PSU will always provide 5VSB, therefore the PC can also be used in the SLEEP mode.
During the HARDOFF procedure, the battery levels will be constantly monitored to prevent deep discharge situations.
6) PPL-I-150 will go to step 1, if ignition is tuned ON again. 3.0 Troubleshooting
a) Motherboard is not turning ON.
Check input cables. Measure voltage on the un-switched 12V. You should get about 12V. Measure the un-switched pin(red) while turning the car ON/OFF. You should see 12V (car on) or 0V (car off)..
b) Motherboard is not turning ON (cont).
Check your output cables. Ensure total system power consumption does not exceed the PPL-I-150
Motherboard is not turning ON (cont).
Make sure that either J8 or J9 is properly connected to the ON/OFF switch of your M/B.
