LTC4063 Anyone Have Experience

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I have been working a project where I am using an esp32-S3 for a wearable. It will run off a 3.7V LiPo battery. For the charging circuit I copied the following off a dev board:

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at the top is the usb interface, in the middle is the charging circuit with the voltage divider for reading the battery voltage, and the bottom is the LDO voltage regulator supplying the +3.3V to the rest of the circuit.

I recently can across the LTC4063

This chip seems to be able to combine both the charging and voltage regulation in one chip. Anyone have experience with using this chip?

Thanks!

Fish

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  • Have not worked with that chip. Have worked with the TP4056.

  • When it comes to LiPo batteries suggest you look at a different technology; life is to precious.

  • Maybe look at the 14430 Rechargeable Battery LiFePO4 3.2V

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A 3xNiMH battery pack would be extremely robust, can be overdrawn without destroying the battery, doesn't require a special charger and can be trickle-charged indefinitely.

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I'd second the LiFePO4 recommendation - these cells can directly power 3.3V systems without need for regulation, and they don't catch fire as readily as LiPo...

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Appreciate the feedback. I did a bit of reading on LiFePO4 and don't believe it is an option. This is a wrist wearable so am looking at a specific form factor. I want about 350 mAh with a geometry of 20mm x 35mm x <6 mm
Also do not want a custom made because cost is an issue. Right now I believe LiPo is my only option.

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Are you using WiFi or BLE?

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