Manufactured, assembled, tested
Li-Ion battery charger, based on BQ24060 IC, this simple PCB takes 5V as input and charges
a 3.7V Li-Ion battery.
The charger has output short circuit protection and optional thermal protection.
It can charge a battery with current up to 1A (the charging current is set by a resistor), the PCB works without a problem at charging current up to ~0.7A, at higher current without heatsink or cooling the IC heats up and enters thermal protection, cycling the charging on and off.
There are 2 indication LEDs for status, green and red LEDs -
| LED color | Charger state |
|---|---|
| Green + Red | Precharge in progress |
| Red | Fast charge in progress |
| Green | Fully charged |
| None | Power off / suspended / fault |
The dimension of the PCB are 33mm X 10mm, it is a 2 layers PCB with compoenents assembled only on the TOP layer
Top view -
Bottom view -
I've created a short time lapse video of the design process, you can click the link below to check it out on my YouTube channel
