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The bq24725a schematic

A project log for Smart Battery, Smarter Power Pack

Fast Charging. Charge your portable devices. Use it as a UPS for your BeagleBone/Pi/Home WiFi Network. Or an emergency laptop power source.

Kumar, AbhishekKumar, Abhishek 06/30/2015 at 03:372 Comments

The TI bq24725a is a SMBus Smart Battery Charger, with integrated synchronous buck controller. It can be used to charge upto 4-cell Li batteries. It also has dynamic power path management, which dynamically switches the load between AC and battery power. It can also monitor current drawn from the AC source as well as the battery which can be measured by an ADC on the host side.

For this design I am using the BQ24725a evaluation board schematics, but that'd be redrawn in KiCAD. Almost done, and this is how it looks as of now.

[Fix schematic]

Now to design the MCU side of things.

Discussions

Andre Moehl wrote 07/01/2015 at 06:16 point

Hello Kumar, 

it seems, there is a small mistake in your schematic. C15 is not correct. It should be connected parallel to R9 and not connected with the wire to the resistor R5/Q2 Gate. Check the Datasheet again.

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Kumar, Abhishek wrote 07/01/2015 at 06:23 point

My bad, caused by having those two wires closeby. I'll fix it. Thanks for pointing out!

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