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5V booster and battery protection

5V booster and battery protection

5V booster and battery protection

(OP)
Hello,

I created a project that is using a 328P to drive 24 LEDs (WS2812) which can draw 2A.
I used a guy to make a PCB layout (attached) and ordered an assembled version but something with the boost circuit is not working right. He used a LTC3872 to boost 3.7 to 5 but the circuit runs the battery down to 2.6 and then I get execution errors on the 328P. The LEDs are a very dynamic load so I think the LTC3872 was a bad choice.
Is there a combined chip that boost to 5V and disconnects at 2.75 and only reconnects if the voltage is back to 3.7 (or some other threshold)?
I looked around but the closest designs I found was basically a 5V battery bank controller.

Any suggestions?
Markus

RE: 5V booster and battery protection

Make sure you have enough input/output capacitance, too... large swings in current draw as a bunch of LEDs turn on can brown out the line if you don't take that instantaneous power draw into account.

Dan - Owner
http://www.Hi-TecDesigns.com

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