BQ40Z80: BQ40Z80 is Register 0x0A reads the charging/discharging current, right?

When the battery is charging, the bit 6 of the battery status 0x16 is not 0, which means that the charging status has not taken effect.

Hello,

Can you please confirm the connection of the sense resistor to the SRP/SRN pins? This reading is much greater than the maximum value that can be reported to this register. Is FET_EN set at this time as well?

Regards,

Anthony

How can the connection of the pins be confirmed, and are they embedded in the battery box?

FET EN is configured what function how to confirm

Hello,

liu billy said:

How can the connection of the pins be confirmed, and are they embedded in the battery box?

Please check what the current being passed across the two points below going directly into the SRP/SRN pins are compared to what is being passed across the sense resistor:

liu billy said:

FET EN is configured what function how to confirm

Please confirm whether this bit is set in the Manufacturer Status register of the device.

Regards,

Anthony

Hello:

      Anthony,  I should write the reg 0xcc and set value is 0x22 , then make the bit FET_EN enable,right?

modify this: reg: 0x00,and set 0x22

Hello,

Please use the FET Control command below, which is 0x0022.

Instructions on how to send a command can be found here:

Regards,

Anthony

OK , Thanks, I will set the reg is 0x44 and send command 0x0022 to try.

Hello,

Understood, please let us know the results of this when available.

Regards,

Anthony

hello:

      No battery charging . when init start ,set 0x44 and sent 0x0022, It still seen the current ma is 65401, please to analyse,

and battery charging , current ma is normal. 

 thank you. 

otherside, get the manufacturer status result , the log show here:

Hello,

fuzhi jiang said:

  No battery charging . when init start ,set 0x44 and sent 0x0022, It still seen the current ma is 65401, please to analyse,

and battery charging , current ma is normal. 

Thank you for confirming this, since when the battery is charging the reading is normal, we know the SRP/SRN functionality is sufficient. Can you please tell us if current calibration has been completed on this device?

Regards,

Anthony

Hello,

Can you please confirm what is meant by "it does not turn successfully"?

If a discharging load is applied, is the current measurement being read back accurate?

Regards,

Anthony

For example：
when read 0xff7d, that is a negative, right, you should convert the data to a negative number and return signed short, but not return unsigned short.

now, I can read back  discharge current. 

Accuracy in verification.

Hello,

Understood, please let us know the results of the accuracy testing when received.

Regards,

Anthony