Power ManagementのトピックRe: MC33774ASP1AE Cell Balancing

MC33774ASP1AE Cell Balancing

mohanagv — Wed, 28 Aug 2024 07:43:54 GMT

As per the NDA MC33774AESP1AE datasheet

1.Is it possible to combine constant current mode with other balancing modes? If yes, does BAL_STAT0.CHx (the bit reflecting that the channel is under balancing mode) affect constant current balancing? If no, what is the stop condition for constant current balancing?
2. What is the value of VCellmin, VCell in PWMDUTYCYCLE=VCellmin/ VCell.?

Re: MC33774ASP1AE Cell Balancing

JozefKozon — Wed, 28 Aug 2024 10:55:04 GMT

Dear Mohana,

[A] Please refer to the AN14084. The balancing modes are very well described there. The balancing modes can be combined. E.g. the Voltage-controlled balancing and Temperature-controlled balancing. Please download the AN14084 from the MC33774A product page, under the secure files.

2. What is the value of VCellmin, VCell in PWMDUTYCYCLE=VCellmin/ VCell.?

Could you please direct me to the formula you are referring to? So far I couldn't find it in available documents.

With Best Regards,

Jozef

Re: MC33774ASP1AE Cell Balancing

mohanagv — Wed, 28 Aug 2024 11:37:51 GMT

1.In the product path below, I am able to find only 5 secure files, and the AN14084 document is not there.
https://www.nxp.com/products/power-management/battery-management/battery-cell-controllers/18-channel-li-ion-battery-cell-controller-ic-asil-d:MC33774

2.Regarding the formula, it is in the constant current balancing section of the MC33774A datasheet.

Regards

Mohana G V

Re: MC33774ASP1AE Cell Balancing

JozefKozon — Thu, 29 Aug 2024 07:12:51 GMT

Dear Mohana,

you need to ask for a higher access. My colleague supported your colleague via chat.

The minimum Cell voltage for the MC33774A is 2.0V. Below this, the UV is triggered.

With Best Regards,

Jozef