- Thu Apr 20, 2017 5:34 am
#194448
Hi, I added a 0.07ohm resistor to increase the charging current to the battery on my sparkfun sunny buddy.
According to the formula, charge current = 0.1/(R1||R_SEN) = 0.1/(0.22||0.07) = 0.1/(0.0531) = 1.88A
During testing on my work bench with a power supply input of 19v and current limited to 1.2A I see the board is drawing 0.4A from the power supply.
At the above level however the inductor, 683C, becomes too hot to touch with my finger.
Is this a concern or normal behavior?
What do you suggest?
Thanks,
Paul
According to the formula, charge current = 0.1/(R1||R_SEN) = 0.1/(0.22||0.07) = 0.1/(0.0531) = 1.88A
During testing on my work bench with a power supply input of 19v and current limited to 1.2A I see the board is drawing 0.4A from the power supply.
At the above level however the inductor, 683C, becomes too hot to touch with my finger.
Is this a concern or normal behavior?
What do you suggest?
Thanks,
Paul