Hello,
I am searching for a battery protection chip capable of UVP, UVP . Overcurrent is not really necessary, because charging current is limited and supervised by the battery charging IC.
Using TI's product search tool I found the bq297xy chip as a soltuion. After reading the datasheet I am a bit confused on how to chose the right chip. As pointed out on the example on page 19 and following, the datasheet suggests a chip with a charge-overcurrent trigger of 70mV (OCC) because of the RDSON of about 14,5m Ohm.
The problem is, that the available devices, suitable for my parameters only have an OCC of 0,155A as stated out in the "released device configurations" table (bq29702) but this isn't working with specs for the thresholds of the bq297xy, right? So how can I realize an OVP of about 4,35V and an UVP of 2,8V with this product, and the roght power FETs?
As i mentioned in my introdoction i would also be fine just with an OVP and UVP that protects the battery from damage, so if there is a more suitable product, i would love to hear about it.
thanks for your help and best regards
Benjamin