Correct power supply for a 19V 200w DC to DC converter (for ITX motherboard)

[wepee]

Hi All,

Recently, I bought this product:

https://www.amazon.com/Mumusuki-LD-200W-Computer-Internal-Components/dp/B07QSVXPHC#HLCXComparisonWidget_feature_div

I bought this product for my ITX motherboard.
It has 24pin ATX connector + 4pin CPU connector.

Here is the product description:

Specifications:
Module Size: Approx. 155 * 35 * 20 mm / 6.1 * 1.3 * 0.7 in
Input Characteristics:
Input Voltage Range: 16VDC - 24VDC
Input Current Range: 12.0A Max @19VDC
Input Surge Current: 12.0AMax @19VDC
Work Efficiency: 85% or more

Output Requirement: Output (Vin=19VDC)

Item Output Voltage
Output Current
Minimum(V) Typical Value(V) Maximum(V) Ripple wave(mV) Standby current Typical value Peak value +3.30V
+3.14 +3.30 +3.47 50 0 8.0 10.0 +5.00VSB
+4.75 +5.00 +5.25 50 0.1 2 2.5 +5.00V
+4.75 +5.00 +5.25 50 0 6.0 10.0 +12.00V
+11.40 12.00 +12.6 120 0 6.0 8.0 -12.00V
-11.40 -12.00 -12.6 120 0 0.1 0.15 Protection Function:
(For +3.3v, +19V, +5.00v and +5.00VSB Power Output)
Overvoltage Protection: when the output voltage reaches 1.5 times the rated voltage, the output is closed.
Short Circuit Protection: when a short circuit occurs in the output, the output is closed.
Environment Description:
Working Temperature/Humidity:  0°C to 40°C / 45% - 75%
Storage Temperature/Humidity: - 40°C to +70°C / 10% - 90%
Atmospheric Pressure: 86Kpa -- 106Kpa

Package Included:
1 x Power Module
1 x 24pin ATX to 12V AUX
1 x 4 pin Molex Power Supply
1 x SATA Power
1 x 4 pin Floppy Drive Power Connection
1 x 4 pin Wire
1 x DC Input Wire

Question:
What is the correct power source- which option below is the best solution that
 I need to buy in order to drive this product and turn on my ITX motherboard?

Below are my options:
a) Meanwell LRS-150-24 https://www.meanwell.com/productPdf.aspx?i=420
b) Meanwell LRS-200-24https://www.meanwell.com/Upload/PDF/LRS-200/LRS-200-SPEC.PDF
c) Huiyuan Fit for 19.5V 10.3A 200W Laptop Slim Power Charger https://www.aliexpress.com/i/4000423720070.html

Your advice and suggestion will be most appreciated. 

Thank you.

[ace1903]

I used to have one small motherboard based PC. Mine was fan less with processor soldered on PCB (AMD C60 i think).
Top power consumption was something in range 40-50w.
200w is power consumption for entry  level gamer PC. Calculate power consumption of the components you have on the motherboard.
If you don't have some super duper graphic card, you can use something like 90W power adapter for laptop.
Even if you make configuration with powerful processor and graphic card main problem will be cooling not power supply unit.
My experience is that ITX format is too much thermal limited that is only useful for kiosk like applications and limited internet surfing.

[madires]

Meanwell would be a good choice, but instead of the industrial style PSUs I'd recommend something like GSM90A or GSM120A (up to GSM220A) with 20V output based on the power requirements of your mini PC.

[wepee]

Hi

@madires @ace1903

Thank you for your reply.

I have consulted a online seller and he said that the only way to power up:

https://www.amazon.com/Mumusuki-LD-200W-Computer-Internal-Components/dp/B07QSVXPHC#HLCXComparisonWidget_feature_div

Is to have a higher power rating than 200w, as it is shown above the link.

So I went and bought the Meanwell  LRS-200-24 switch power supply.

After more than a week, it has been running fine @24/7 operation.

My application is used on a pfSense firewall router for home use.

The LRS-200-24 has got 24 v 
and it is able to pump out 8.8A
Power = 24 v x 8.8 a = 211.2 Watt

Thank you.

[JoanTheSpark]

Just want to leave that here, in case somebody is looking for a 'datasheet' for that DC-DC converter

Totally forgot, this seems the original source of my unit, as far as I can tell (their details had been on the box the dc-dc converter shipped in): https://www.rgeek.com/portfolio-item/rgeek-pico-psu-rg-200wl-24pin-dc-19v-power-supply-module/