BQ24160 - single cell Li-ion charger minimum dropout voltage specification ??
Hey TI Tech Support Team, we're trying to launch a new product which uses the BQ24160 and have run into kind of a a show-stopping issue in reaching an understanding of what the expected behavior is as Vusb or Vin is above the specified min, but approaches the programmed Vbatreg value and even drops below Vbatreg while still remaining above the 4.2V min.
Basically, a datasheet description seems to be missing to specify and explain how much greater Vin or Vusb must be above the battery charge termination voltage in order to be able to initiate and/or complete a charge. Vusb min is specified at 4.2V, but Vbatreg may be up to 4.44V; Obviously, the battery may not be charged above Vin or Vusb, but no specification is given for the minimum difference between Vbatreg and Vin or Vusb. We need to understand how the device will behave under these conditions.
...I'm concerned that if Vin or Vusb is below Vbatreg or drops below Vbatreg, then a charging cycle may still be initiated and continue, but may never terminate...or will it terminate based only on the charge current below the threshold?
PS: the team at Support@ti.com merely passed-the-buck to E2E...very annoying.