Part Number:BQ24070
Hi,
We are designing a battery charger for our application device and we are planing to use BQ24070 part
Let me put forward you the requirement that I have
- Input adapter voltage is 5V to 12V.
- I want to charge the 3.7V Li-Poly battery as well as Power the system. The OUT pin is connected to the wide range regulator that requires 1.25A at he input side(system Load)
But there are some concerns/doubts regarding the design aspects of this IC
- Its specified that output voltage is regulated 4.4V Vout. My doubt is whether this IC produce regulated output(4.4) for all the adapter input voltage(in my case its 12V adapter) and what will be the output current that is supported by this pin (OUT pin) at when Regulated voltage is generated Please suggest.
- Will this IC provide the same 4.4v regulated output voltage when there is no external adapter, i.e; what will be the voltage at OUT pin when there is only 3.7V battery?Is it the battery voltage will be appearing at the OUT pin or else even the battery voltage will be regulated to 4.4V? Please clarify
- what is the purpose of the DPPM voltage? how to set it for my application? Please suggest
- Initial case there will be only battery connected to the system and its powered by the battery itself, now suddenly if I connect the external 12V adapter will there be any switch over delay?
- I am not using USB input in my application So what should I connect to The ISET2 pin?
- What will happen if the CE pin is kept floating?
Request you to address this concerns ASAP
Regards,
Ashok