Have anyone made a good soloution for putting dual batteries in parallell on a BR2?
I looked at SeaviewSystems, but they don’t sell this anymore…
I’m happy to point you to a part that works well, the LM5050MK
The Seaview Systems board was pretty good, but we actually had the board get so hot once that the soldered melted and the part came off.
We use the LM5050MK in a power supply we’re still keeping “top secret” but it is just an “OR-ing Controller”. The difficulty is that you will need to make your own PCB to use 2 of these parts and also the required N-channel MOSFETs. However, it’s not as hard as it appears. When we make our next version of our power supply, we might just upload a simple battery selector design and make it open hardware. If you’re interested, please let me know.
If you do design your own board, please be sure to take into account the following criteria:
-PCB trace current carrying capacity (these days, we mostly design with 3oz copper).
-Select a MOSFET with continuous current capacity well beyond what you need.
-Pay attention to the RDS-ON value on the MOSFET and calculate heat dissipation and be sure to get the heat out of the part. You don’t need to know Thermodynamics, but you will need to keep power dissipation to only a few Watts or use a heatsink.
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