DIY LiPo Charge/Protect/5V Boost Circuit





Introduction: DIY LiPo Charge/Protect/5V Boost Circuit

In this video I will show you how I combined a couple of ICs in order to create a charge/protect/5V boost circuit for a single cell LiPo battery. Along the way I will show you how I designed the PCB, how I ordered it and what kind of problems occured while soldering the components and testing the circuit. Let's get started!

Step 1: Watch the Video!

The video gives you all the information you need to create your own Charge/Protect/Boost circuit. In the next steps though I will present you some additional, helpful information.

Step 2: Order the Components!

Step 3: Create the Circuit/Order the PCB

Here you can find the schematic of the circuit and the Gerber files. You can use them to order the PCBs with JLCPCB:

Or you can simply open my EasyEDA project with my board design and click the fabrication output button:

Once you receive the PCBs, all you have to do is solder the components to it with the help of the schematic.

Step 4: Success!

You did it! You just created your own LiPo Charge/Protect/5V Boost circuit

Feel free to check out my YouTube channel for more awesome projects:

You can also follow me on Facebook, Twitter and Google+ for news about upcoming projects and behind the scenes information:

2 People Made This Project!


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Regarding ordering components from LCSC - I see on their website a "BOM TOOL" which can import a spreadsheet listing all the components. So, why not include a parts spreadsheet?

Awesome...always love your designs and things!
Shared this at OSHPark for another way to order the boards...

why did you choose 603 parts.

Awesome! What should I change if I want the exact same characteristics but with an output of 3.3V?

Try creating a voltage divider on the output of the circuit.

but it s a boost converter ic , i don.t think you can get lower than the 4v or input voltage of i.c

voltage divider maded by 2 resistort and midle to fb of boost ic .

Would more than one amp (about two) be possible with some small changes?

I've tested out boards from Amazon, and milled out my own version of Great Scott's, you can get 1amp easy with the MT3608. However, due to the current limiting factor of my lab bench power supply I could get it to only get to about 1.3amps or so. The power supply reaches the 3 amp current limit. Keep in mind if you are planning to pull 1amp or more from the MT3608, while possible, the chips get very warm, and the voltage drops to about 4.8vdc.

I would make sure the coil and schottky diode can handle the extra current. The diode that GS uses should be more than adequate. BTW, according to the MT3606 data sheet, the schottky diode recommendation formula is SQRT(Iout×Ipeak).