UP610 Battery Charger Broken: Teardown

rbutl61

100 µW
Joined
Feb 25, 2019
Messages
7
I bought this hobbyking UP610 200w smart battery charger around three months ago. It has been working very well, up until this morning. Overnight, I had been charging a homemade lifepo4 pack at 10 amps, (4S pack). In the morning, I disconnected the charger, and when I reconnected it to power, the screen was visibly duller, and it is unable to charge. I am curious as to what chinesium magic is in this thing that makes it so powerful in such a small form factor.
 
there is no chinesum magic. its a simple buck-boost converter with a fancy lcd screen.

the real power is in the power supply you use to power the thing. that takes up the bulk of the power. this thing only has to change the voltage down (or up) to the desired level and then its just a matter of pushing amps wich is done with a simple mosfet. as th voltage difference is quite small between the input and output it can put a lot of power in a small box.
 
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