MP2760 IC Doubts / Clarifications

Battery Management
1

Hi,

1.Let us consider for 1-4 cell CC mode operation, Opportunity to increase charging current rating of 5 A from 2A .Is it possible to increase current rating by using I2C (On the go) right?

  1. we want to select IC for 1- 4 cell operation with the register setting option device, MP2760GVT-0000 - Is this part is suitable for our application, correct? If not, need your suggestion on the same.

3.Since I am not using USB 3.1 Or Type C options, Can I change the charger current without using PD Controller? If yes, please explain the same.

Regards,
Sendhil Kumar

2

Hi Sendhil,

  1. Yes, this is doable, you can verify by utilizing the GUI and with an evaluation board.
  2. I advise caution for 4S w/ 5A charge current, ensure you size components appropriately for safety and set the registers configuration with close attention to protections. UV/OVP/OCP/OTP and input threshold.
  3. This device is capable of operating standalone (without HOST or PD Controller), however please ensure that you test the range of operation for your unique application.

Best,
Nouman

3

Hi Nouman,

Thanks for your clarifications…

  1. we want to select IC for 4 cell operation with the register setting option device, MP2760GVT-0000 - Is this part is suitable for our application, correct? If not, need your suggestion on the same.

  2. In the Narrow VDC PPM setting, System OVP is mentioned as 00-125%,01-120%,10-115% & 11-110% ranges, I understand that 125%- means max allowable OVP voltage beyond that it will be limited but 00-Means, I didn’t understand the working concept so, please explain the same for us.

Regards,
Sendhil Kumar

4

image
image1907×958 171 KB

Screen short is for your reference.

5

Hi Sendhil,

  1. For 4 cell, you will need to order the -040A suffix, not the -0000 suffix. Refer to pg 3 for ordering information.
  2. Regarding your second question, the OVP setting is the threshold limit you chose for your application, there are 4 options. Say our output is 16V, your OVP would be is 16V+10%, if you go with default option. This is similar for a UV condition, so if your design reaches 75% of your Vsys threshold. The IC will indicate UV fault.

image
image1165×495 45.6 KB

Best,
Nouman

6

Hi Nouman,
I got it. Thanks for your clarifications.
1.During charging mode, IBATT_DIS is consuming current of 162.5mA. As per my understanding IBATT_DIS current consumption should be to 0mA but its consuming current at discharge mode why? Need your clarification on the same.

  1. As per GUI monitor 25.97 % but NTC _FAULT says that 011-NTC Warm - Why it showing like that? Need your suggestions on the same .
    3.-040A Suffix part can be register settable option right? -40A Part is suitable for 4 cell operation that I understood but my doubt is it support for register settable availabe or not. That is what im keep on asking this question.

  2. MP2760GVT-040A-Z this part is non-stock item in Digikey and Mouser distributor. How we can manage the components order -Need your support on the same.
    Attached screen shot for your reference.

    image
    image1889×953 176 KB

Regards,
Sendhil Kumar

7

Hi Nouman,
Any update on my doubts?

Regards,
Sendhil Kumar

8

Hi Sendhil

  1. This is not a real IBATT_DIS current consumption, and it is caused by IBAT_DIS ADC conversion error. There is no real IBAT_DIS until charge current decreases to 0, so you may ignore the IBAT_DIS ADC indication while charge current doesn’t decrease to 0.
    IBAT_DIS ADC indication will increase while charge current decreases, when charge current (IBATT) decrease to 0A then IBATT_DIS ADC may indicate about 900mA, this is the IBAT_DIS ADC channel offset. Customer should cancel this offset if battery enter discharge mdoe.

  2. This should be correct. The warm threshold setting is 25.9%, consider ADC conversation error and data distribution it is possible that 25.975% may trigger NTC warm.

  3. The register for 4 cell configuration is settable via OTP.

  4. For ordering support, please contact here - Online Order Support - Contact (monolithicpower.com)

Regards,
Nouman