INA219 issue check

David,

Let us look into this and we'll follow up with you shortly.

Carolus

Hi David,

It is Vbus the only register with wrong values? What are the pull up resistors values in the communication lines?

Regards,

Hi David,

Another note. Please double check with the customer to make sure they have shifted the bus register to the right by three bits to get a right justified value.

Regards,

Hi Mayrim
As the bus voltage can be tested easily, so now we only verify vbus register. Yes, confirmed that customer already shift bus voltage register by 3 bits. I have one question here, VBUS reg value is 0Xe251. i notice bit1 is 0 and bit0 is 1. Then it means CNVR is 0 and OVF is 1. Any comment here?
regards
david

Hi Mayrim

Pull up resistor is 10kohm. Now i just test vbus register. Please ignore (02 reg)e251 value I mentioned above. Something is wrong with that test board. I ask customer to test another 4 boards. IN-/GND are all 10.9V. But the vbus voltage reads 12.5V, 13.6V, 14.6V, 14.6V for each board. For 00 and 05, customer just use default value now. What is your insight of this? Thanks!

regards

david

Hi David,

Can you please share customer schematic so I can try to recreate the application? Also please share with me the values of all registers so I can compare with my testing.

Regards

Hi Mayrim

Schematic attached, also I2C pull up resistor is 10kohm. Calib = 0xF00. Configur Reg=399F(default). Get: Shunt Voltage=380ah, VBUS Voltage=7a53h, Current Reg=0900h, Power Reg=0500h. Now I notice that the reg read value even cant meet the equation(power reg, current reg) in datasheet. Please help comment. Thanks!

8078.ina219 schematic.pdf

regards

david

Hi Mayrim

Any feedback about this case? Thanks!

regards

david