Other Parts Discussed in Thread: BQ24610, BQ25713
Hi,
we are evaluating BQ24650 on the evaluation board, modified it for a 5 cell application ny changing the feedback resistors R1 and R2 ans some questions came up:
1: We realized if the part comes to full of charge it disables charging but then after 5s it switches on charging again for ~10s, switching off and then on again. This happens several times till it stops charging.
What is the reason for this ?
2: what is the reason for D1 in the typical Application on the first page of the DS ?
- we want to switch off the part completely when no charging is need - that meen Vdd switching off. Can therefore a transistor be used instead of D1 ?
- is a second transistor recommend on the output of the BQ24650 to prevent some "backcurren" from the battery ?
Do we have a alternative part like BQ24610 where the battery can be disconnect from the input and system but like BQ24650 for solar panel application ?
3: is there a more detailed description of the topics 8.3.2 and 8.3.5 available ?
- for the MPPSET is this only happen with solar panels that if they reach their max power level the voltage drops ?
- is there a more detailed description when the part has stopped charging how long it takes till new charging starts again ?
What exact is the voltage of the battery when recharge will start againg. What does it mean with respect to Vreg ?
Many Thanks
Best wishes,
Olrik