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250W DC-DC Boost Module Test & Reverse Engineering

250W DC-DC Boost Module Test & Reverse Engineering

nqtronixnqtronix
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  • nqtronixnqtronix
  • romainRomain

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module reverse engineering boost dc-dc

This project was created on 01/01/2021 and last updated 4 years ago.

Description

This DC-DC boost module seems to be fairly popular due to its wide operational range, high power and low cost (about 3-5€ on aliexpress). It's build with an aluminium core PCB, to cool it can be attached to a heat sink with thermal adhesive tape.

It converts 9-48V to a maximum of 48V, the output power is rated at 250W but effectively limited by the max input current of 6A. The efficiency is about 90-95%.

I was curious on how it works, so I desoldered the inductor and reverese engineered the PCB. It was almost imposible to see the traces, the schematic was derived from a bunch of continuity tests, so there might not be 100% correct. Afterwards I did a quick performance test where I placed it on a small metal case. At 100W output the transistor temperature was only 45°C, at lower loads you propably won't need any extra heatsink at all. Not that this does not have over temperature protection build in, you must verify your application!

Files

20220531_version_2018_by_OneOfEleven.jpg

JPEG Image - 734.66 kB - 05/31/2022 at 17:38

Preview

20220602_full_schematic_by_OneOfEleven.png

latest revision

Portable Network Graphics (PNG) - 162.34 kB - 06/02/2022 at 16:04

Preview

1.JPG

JPEG Image - 11.03 MB - 01/01/2021 at 13:08

Preview

2.JPG

JPEG Image - 11.11 MB - 01/01/2021 at 13:08

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3.JPG

JPEG Image - 8.06 MB - 01/01/2021 at 13:08

Preview

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Project Logs
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  • Update 3: This should be the final one...™

    nqtronix • 06/02/2022 at 16:10 • 0 comments

    One more update by OneOfEleven, he send me me this:

    Found some errors in the schematic nqtronix and added the component values as well. This should now be the final and correct schematic ..

  • Update 2: New PCB revision

    nqtronix • 05/31/2022 at 17:43 • 0 comments

    Another helpful update by OneOfEleven:

    Your PCB looks to be a 2014 version, mine appears to be a 2018 version (only difference is R1 & R20 I think). Here's a piccy of mine you could add if you wanted to help others.

  • Update: Complete Schematic by @OneOfEleven

    nqtronix • 05/31/2022 at 14:56 • 0 comments

    OneOfEleven has created a correct and complete schematic of this module, you can find it in the project files or below. Thank you for sharing this!

  • Additional Information

    nqtronix • 12/11/2021 at 15:49 • 0 comments

    By chance I found another post about this dcdc converter with in-depth measurements. Check it out here: https://lygte-info.dk/review/Converter DC-DC 10A 8.5-48V to 10-50V 250W UK.html

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