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Author Topic: Tips and Tricks for the latest LM2596 Adjustable CC/CV With current monitor LED  (Read 269 times)

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Online Kiriakos GR

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New generation of  LM2596 Adjustable CC/CV With current monitor LED, this is truly an improvement to the right direction.

I did got one an tested it as battery charger for my NI-Cd pack this requiring 21V to be charged.
Specific LM2596 Adjustable CC/CV, it does serve well my application by this be adjusted at CC of 600mA  and current monitor LED I adjust this at 100mA.

First in row LED this is monitor of current activity, theoretical minimum this is 5% of max adjusted value up to max setting. 
In reality somewhere at below 90mA this LED turn-off.

One product design issue which I faced was current adjusting by following the instruction of using a digital multimeter as short of the output (10A input). 
Shunt resistance lower than 0.05 Ohm this activates short circuit protection !!!   :P
I was had to use my analogue multimeter which this has higher shunt resistance than my modern digital ones at 2.5A & 7.5A range.

First tip that you may use, this is to connect  0.100 Ohm resistance in series with your digital multimeter shunt (10A input).

Second tip DO NOT use 400mA range for such settings, Fuse is five times more expensive that this LM2596.

Third tip, use a blocking diode in the output, when input voltage this is disrupted, there is 23mA load caused by output LED indicators ( Energy supplied by the charged battery).   

In my project I am planning to add and a small digital volt meter ( is on the way) and a small project box.
When I will come down in to a finalized plan, I will also post pictures from this upcoming project. 
Specific module price this is as low as 1.30 Euro at eBay, which is somewhat reasonable.
I did select carefully specific PCB revision, because there is pads for soldering external LED for use in a project box.  ;)       
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