Hello,
In our design we use the bq24050 with a 10K NTC.
In order to check the correct functionality of the NTC protection circuit, we simulate the temperature rising by changing the value of a resistor instead of the NTC.
We change the resistor from 10Kohm to 1Kohm (which simulates a temperature of more than 80 C).
When changing this resistor value, we expect to see a reduction in the charging current from the IN pin of the bq24050.
In our test, when we set the NTC simulator resistor to 10K, we see a charging current of 1A (as expected).
When we set the NTC simulator resistor to 1K, we see a not consistent value: the charging current is reduced to 30mA or to 5mA, depending on the board under test.
The boards are from the same design, only produced in different batches.
I need help to understand this expected current in this second case, when the resistor is 1K Ohm.
What should be the current in this case ?
Thanks !
Leonardo Sandler
