I am high school student making portable speaker with RC toy battery - 4 cell lithium polymer ( 14.8v ) with balance charging connector, and as I am looking for some type of integrated balance charger and battery protection i came across BQ29330 - and by specs it seems amazingBut i have few questions
Thank you in advance!
1. The bq29330 measures voltage directly and then converts that into a digital signal that the gas gauge (bq20z90 for example) can interpret. It was designed to be used in conjunctin with a TI gas gauge.
2. No, you will need a separate charging chip for this.
3. There is no functional difference. The T is and TR indicate what the chips are shipped in, tube or tape and reel. The G4 is just the green version of the device.
4. Voltage no, current yes. It can detect overcurrent in charge and discharge as well as short circuits.
Thank you very much!4. is a bummer because the batteries don't have internal protectionbut theoretically I could send the voltage signal to an separate IC and than configure that IC to show low battery warning and to disable the the battery?
The gauge is actually responsible for voltage protection and will take care of low battery warnings. You may want to check out the following product folder (bq20z90). You can find datasheets and other documentation there. You can also order an EVM kit, which includes bq20z90 and a bq29330 device.
Thank you! This is quite useful!evaluation board is a bit overshoot for my projectbut I can use that bq20z90Does any of your battery charging chips work directly with those two? Can you recommend one?for capacities from about 4Ah to 8Ah, 4 cells
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