Hi, I am recently assigned to a project which is highly related to power management. The problem is simply like this: There is a circuit that already works but it is wanted to work on some areas constantly have power line down issues. So, I need to design a power management circuit that will always work with or without power line. When power goes down, management system must switch automatically to battery mode, and when it comes back it should automatically start to charge battery. So bottom line, microcontroller must always work without any data loses.
Since I got the project, I have been researching for power management chips on digikey, so far I found lots of chips however I am not sure they are what I am looking for.
http://www.digikey.com/product-search/en/integrated-circuits-ics/pmic-supervisors/2556197
http://www.digikey.com/product-search/en/inte...s-ics/pmic-battery-management/2556336?stock=1
The main circuit works on 3.3 V standart VDD and current consumption is max 33 mA.
For instance, this is what I am inspecting most: http://www.freescale.com/files/analog/doc/data_sheet/MC34673.pdf
What I am not clear about is this can drive both main circuit and charge the battery at the same time. And also when power line is down, can it companse instant voltage peak and do not cause to data lose. If anyone can help me I would be very appreciated. Thanks.
Since I got the project, I have been researching for power management chips on digikey, so far I found lots of chips however I am not sure they are what I am looking for.
http://www.digikey.com/product-search/en/integrated-circuits-ics/pmic-supervisors/2556197
http://www.digikey.com/product-search/en/inte...s-ics/pmic-battery-management/2556336?stock=1
The main circuit works on 3.3 V standart VDD and current consumption is max 33 mA.
For instance, this is what I am inspecting most: http://www.freescale.com/files/analog/doc/data_sheet/MC34673.pdf
What I am not clear about is this can drive both main circuit and charge the battery at the same time. And also when power line is down, can it companse instant voltage peak and do not cause to data lose. If anyone can help me I would be very appreciated. Thanks.
