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I want to ask you. I have a circuit powered by a 3.7V lithium battery. When the lithium battery is d

By.Johns 2024-08-03 14:54:01 Share on facebook Share on Google Share on Instagram Share on Pinterest Share on Twitter Share on Tumblr Share on WhatsApp Share on Telegram Share on Reddit Visit our Instagram

Introduction I want to ask you. I have a circuit powered by a 3.7V lithium battery. When the lithium battery is discharged, can I use USB to power the circuit and charge the lithium battery at the same time? Simply connect the two USB power terminals

I want to ask you. I have a circuit powered by a 3.7V lithium battery. When the lithium battery is d

All you need to do is connect a 0.5V diode in series to the two power terminals of the USB. At this point, the voltage supplied by the USB to the battery is 4.5V, so the battery can be charged. The saturation voltage of the battery is 4.2 V, but there is no problem in supplying 4.5 V (if you are afraid of damaging the battery, connect a 10 ohm resistor in series), so to be able to charge the battery and power other loads at the same time. at the same time.

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