Other Parts Discussed in Thread: BQ40Z60, BQ24800, BQ25720, BQ24610, BQ24800EVM
Hello fellow engineers,
We're currently working on a redesign of a product which contains a BQ40Z60. The charge controller will be replaced by the BQ40Z50 and an SMBUS controlled charge IC. The application has a charge voltage of 24VDC +/- 5%. The battery is a 4 cell lithium pack. The charger voltage will never drop below the maximum battery voltage, so a buck controller would be fine.
The preferred option will be the BQ24800, but the datasheet lists a recommended maximum input voltage of 24V with an absolute max of 30V. Can this IC safely be used with the previously mentioned charge input voltage?
Another option will be the BQ25720, but this is a buck-boost converter, meaning that it contains two more MOSFET than a buck converter. Those MOSFETs will never be utilized since the input voltage is always higher than the battery voltage.
Is there any charge IC that can replace the BQ40Z60s built in charger without needing two extra MOSFETs and works up to 26V like the BQ40Z60?
Kind regards,
Svenn