Hello all,
I am building my own set of bluetooth headphones, and I am a little overwhelmed on what fuel gauge would be best for my application. Could someone offer some advice on what could be my best option?
Inside each headphone pod(part that hold the speaker), there is going to be a TPA2013D1 amplifier with its own battery(300mA to 1000mA). Both the left and right side batteries would be hooked in parallel, with a pair of wires going from the left pod, across my head, to the right pod. That way both batteries would balance each other out, but most of the current draw would be done locally within the pod. I hope that makes sense.
For a starter, the batteries could be changed. I want to try different size batteries to find the best ballance between run time and weight. But after I find the batteries I want to use, they will not be removed until they go bad.
I was thinking of putting 2 fuel gauges in the set. One in each pod, after the battery, and before the amplifier. The pair of wires i will be using to balance the batteries, would be after the fuel gauge. Then my micro would just take the information from each pod, and determine what the remaining capacity would be.
My thoughts for doing it that way, would allow me to know what the health of each battery is, and to allow me to know how each pod is performing.
I am wondering if anyone would have an idea on what fuel gauge I should use? and/or a better idea. I'm open to any ideas I get. Only requirement I have is what packages I can use. One, I am pick & placing the parts by hand, and using a toaster oven to reflow the parts. Two, my board house has limits of 5mil/5mil trace and spacing, with 10mil holes. So most BGA packages will not work (0.5mm pitch)
Thanks for any, and all advice I get
Anthony